International Bureau of Weights and Measures, SI base unit: mole (mol), Wikipedia the free Encyclopedia Mole (Unit). WebBFIN 350 CALCULATOR INFO.docx. For example: Each unit is converted independently using the standard unit analysis method. WebSolve math problems. Notice units indicated in the table (JAVA script must be activated). WebBFIN 350 CALCULATOR INFO.docx. WebInterconverting compound SI units Convert the following measurement. Logic; English language ALEKS - Daniela Andrade-Learn = interconverting compound SI units Convert the following measurement mg 0.867 dL A hollow copper wire with an inner diameter of 0.60mm and an outer diameter of 2.0mm carries a current of 14 A. (a) 80 g and Posted by . Use of this mole calculator comes in handy when you are solving some complex problem and dont want to get involved in repetitive tasks. By 1875, two thirds of the European population, and nearly half the world's population had adopted the metric system. $$ = 2 * 56 $$ In each mode, this mol calculator takes different inputs and produces a range of results as shown below: Select Moles from the drop down menu titled Calculate. Although Congress considered Jefferson's report, it was not adopted. WebFree engineering unit converter tool featuring: Over 1,000 built-in units; 95 engineering properties; Multiple scientific notation systems; Ability to control significant digits; Choose from U.S. and metric (SI) units; Copy the Knovel Unit Converter URL to easily share conversions and custom units with colleagues or team members f. 10 -15. The Chinese also developed a means to ensure accuracy through the use of a special size of bowl used for measurements that also made a specific sound when struck if the sound was off pitch, the measurement was not accurate. To make chemistry unit conversions, first choose the chemical in the top pull-down selector. Therefore, the answer should also only have 2 significant digits:24 m/s. On similar lines, one mole of different substances would weigh differently. 1 femtometer (fm) = 10 -15 meters. And has a feature to scan the math problems. 5 g cm kg m 0x10 7.8 10-2-= Show transcribed image text $$ = 0.2 * 44 $$ $$ = 40 g $$, $$ \text{Number of Moles} = \frac{Mass}{\text{Molar Mass}}$$ Select the current unit in the left column, the desired unit in the right column, and enter a value in the left column to WebInterconverting compound SI units Convert the following measurement. Why did I do that? WebCalculators Acceleration Area Body Mass Index Date Duration Density Distance Force Mass Perimeter Surface Area Volume Planets and the Sun Distance from Earth Ellipticity (Flattening) Equatorial Radius Length of Day Mass Mean Density Mean Longitude Number of Natural Satellites Semimajor Axis Surface Area Surface Gravity Surface Pressure This online calculator also enables you to do the following conversions: A significant feature of this mole conversion calculator is that it also determines the number of particles (atoms, molecules etc.) For instance: The SI or International System of Unit of force is the derived unit newton or N A Newton (N) is equal to 1 m. kg/s2 You can use derived unit measurement calculator to get the instant and error-free measurements conversion. Mass of 1 Mole of \( HC_{2}H_{3}O_{2} \): We always struggled to serve you with the best online calculations, thus, there's a humble request to either disable the AD blocker or go with premium plans to use the AD-Free version for calculators. 1 femtometer (fm) = 10 -15 meters. WebConvertUnits.com provides an online conversion calculator for all types of measurement units. SBDR - SOCIETY FOR BIOMEDICAL DIABETES RESEARCH WebThis calculator converts a single unit or a mathematical expression with units to the base metric (SI) units. Pounds to Kilograms. While England also adopted this measure, a shortage of silver caused King Offa to reduce the measurement of the pound to 5400 grains in order to use smaller coins. 8.8 Mortgage Calculator . WebA fun, interesting, new way to use a calculator for any oof you math problems you have an issue with. Although SI is intended for global use, it has not been fully adopted, and some other systems of measurement are still used in parts of the world. In that same year, Thomas Jefferson, presented the "Plan for Establishing Uniformity in the Coinage, Weights, and Measures of the United States," which advocated for a decimal system in which units were related to each other by powers of ten. Moreover, it also executes mole conversion by providing the number of constituent particles in the material. Select the current unit in the left column, the desired unit in the right column, and enter a value in the left column to generate the resulting conversion. Everybody needs a calculator at some point, get the ease of calculating anything from the source of calculator-online.net. Question 1:The wave function for a traveling wave on a taut string is (in SI units)1. The Mole is an amount unit similar to pair, dozen etc. WebThe following formula is used to calculate a slant height. A motorcycle is traveling at 85 km/hour. Webinterconverting compound si units calculator. It is used in The Review of Diabetic Studies. WebHeight cm to in & ft. Kilograms to Pounds. Conversion Calculator. If 1 kg of pure copper contains 15.74 Moles, what is the molar mass of Copper? WebThe Mole is an amount unit similar to pair, dozen etc. Physical/Quantum I have given the wavelengths of a photon that releases an electron from the inner shell of an atom. as well as for mole (i.e. Because if (60min)/(1hr) = 1, then I can multiply any measurement by that fraction and not change its value. This online calculator also enables you to do the following conversions: significant feature of this mole conversion calculator is that it also determines the number of particles (atoms, molecules etc.) Next, select the starting unit and enter a value in the FROM input. kilogram per kilogram, which may be represented by the number 1. kg/kg = 1. If you had 60 x= 1 y, you could certainly divide both sides by 1 y.) Next, select the starting unit and enter a value in the FROM input. atoms, molecules etc. Although SI is used almost universally in science (including in the US), some countries such as the United States still use their own system of units. 8,735 satisfied customers. WebPh.D. WebFind the Units to Convert Common Conversions cm to inches kg to lbs Celsius to Fahrenheit mm to inches meters to feet km to miles cm to feet grams to ounces inches to feet liters to gallons pounds to ounces mph to kph acres to square feet radians to degrees hp to kw meters to yards mL to cups inches to cm lbs to kg Fahrenheit to Celsius The Chi and Zhang were units of length equivalent to approximately 25 centimeters (9.8 inches) and 3 meters (9.8 feet) respectively. $$ \text{Molar Mass} = \frac{Mass}{\text{Number of Moles}} $$ As such, many unit converters including this Conversion Calculator exist, and will continue to do so to ensure that people globally are able to communicate different measurements effectively. LEKS-Jose Ortega - Learn Density Calculator p m/V O MEASUREMENT Interconverting compound SI units Convert the following measurement. Length. How easy was it to use our calculator? Analyte. $$ = \frac{108}{27} = 4 Moles $$, $$ \text{Number of Moles} = \frac{Mass}{\text{Molar Mass}}$$ Welcome to use Unit Conversion Calculator for free. ALEKS - Daniela Andrade-Learn = interconverting compound SI units Convert the following measurement mg 0.867 dL A hollow copper wire with an inner diameter of 0.60mm and an outer diameter of 2.0mm carries a current of 14 A. Results of these problems can be verified using our mole calculator. Contact| Example 1: miles per hour to kilometers per hour. What-is-the-minimum-data-required-for-a-moles-to-grams-conversion-vice-versa. How to find Moles of a substance? 3.3 107-012_-D *10 mol 3.3 10 11 kg m g'cm. L = SQRT ( H^2 + (S/2)^2) Where L is the slant height; S is the length of any side (Use the diameter at the base for a WebQuestion: LEKS-Jose Ortega - Learn Density Calculator p = m/V O MEASUREMENT interconverting compound SI units Convert the following measurement. LEKS-Jose Ortega - Learn Density Calculator p m/V O MEASUREMENT Interconverting compound SI units Convert the following measurement. Calculate the mass of is object oriented programming overrated why is there a plague in thebes oedipus interconverting compound si units calculator. 8.8 Mortgage Calculator . First, we can either convert the kilometers or meters OR the hour to seconds; mathematically, it works out the same. WebUnit Conversion Calculator. While this may work on a local level, when considering trade, as well as science, having systems of units based on units that others may not be able to relate to or understand makes interaction difficult. interconverting compound si units calculator. Interconverting $$ = 132 g $$, b) mass of 0.2 mole of \(CO_{2}\): Select the current unit in the left column, the desired unit in the right column, and enter a value in the left column to generate the resulting conversion. 2. (Step by Step): When are we required to convert moles to grams? 25) bleach to one gallon To calculate LEL to ppm example Methane 100LEL. While performing a chemical reaction in a lab, we can easily determine the number of moles of a substance required for that process through some analytical approach. We Answer! ALEKS - Interconverting compound SI units(1).pdf. 8.8 Mortgage Calculator . as well as for mole (i.e. typical tower sum yours calculator shower chicken jason temporary attend. Question 1:The wave function for a traveling wave on a taut string is (in SI units)1. What are the speed and direction of travel of the wave? WebMolar Mass = 58.44 g mol. Did you face any problem, tell us! A full list of unit conversions is available at unitconverters.net. Best app I ever download, but overall it's very helpful. However, we need to physically weigh the substance in order to add it to the reaction flask. 25) bleach to one gallon To calculate LEL to ppm example Methane 100LEL. To make chemistry unit conversions, first choose the chemical in the top pull-down selector. WebThe following formula is used to calculate a slant height. WebInterconverting compound si units calculator. SI derived units with special names and symbols. Select conventional unit: Albumin g/L Aldosterone (nnmol/L) Ammonia (as NH3) mol/dL Bicarbonate mmol/L Bilirubin total mol/L BUN - mmol/L Calcitonin ng/L Calcium mmol/L Chloride mmol/L Cholesterol mmol/L Corticotropin pmol/L) Cortisol nmol/L Creatinine mol/L Ethanol mmol/L Ethylene glycol It is used in everyday life, from counting to measuring to more complex calculations. Due to their extremely small sizes, atoms, molecules and formula units are usually very difficult to work with. WebEach & every field requires more and more accurate result, therefore we developed to generate very much accurate results on this easy unit converter site. Webinterconverting compound si units calculator. Historically, many different systems of units have been used, where a system of units is defined as a collection of units of measurement with rules that relate them to each other. By 1920, the percentage of the world's population using the imperial system or the US customary system was ~22%, with 25% using mainly the metric system, and 53% using neither. WebEach & every field requires more and more accurate result, therefore we developed to generate very much accurate results on this easy unit converter site. [Download .. Chemistry Practice Problems: Names & Formulas Molecular Compounds. As a result, a pound, 16 ounces of silver, or 7200 grains, became a commonly used measure in many regions. Conversion Calculator Use this Conversion Calculator to convert between commonly used units. This calculator works in three different modes and these can be accessed from the drop down menu titled Calculate. All Rights Reserved. 1 femtometer (fm) = 10 -15 meters. math is the study of numbers, shapes, and patterns. Select the current unit in the left column, the desired unit in the right column, and enter a value in the left column to Minutes to Hours and Minutes. $$ = 0.25 * 56 $$ LEKS-Jose Ortega - Learn Density Calculator p m/V O MEASUREMENT Interconverting compound SI units Convert the following measurement. (a) 2 moles of Iron Minutes to Hours and Minutes. SI is the modern form of the metric system, which contains e.g. cd/m 2. mass fraction. It reports the standard base units of meter, kilogram, second, kelvin, ampere, mole, and candela. Webcandela per square meter. WebQuestion: LEKS-Jose Ortega - Learn Density Calculator p = m/V O MEASUREMENT interconverting compound SI units Convert the following measurement. The only difference is that we are converting more than one unit now. However, note that hours are now in the denominator (on bottom) so in order to cancel they will be in the numerator (on top) of the conversion factor: 85 km/hr x 103m/1 km x 1 hr/60 min x 1 min/60 s = 23.611 m/s. WebUse this Conversion Calculator to convert between commonly used units. Convert Now Currency Area Calculators Volume Calculators Tips of the substance along with handling a large number of measurement units for mass (i.e. $$ = \left(4 * 1\right) + \left(2 * 12\right) + \left(2 * 16\right) $$ $$ = 3 * 44 $$ Oakland middle school. Select Molecular Weight from the drop down menu titled Calculate. WebUse this Conversion Calculator to convert between commonly used units. Conventional Units. MATHEMATICS GEOMETRY. 31 Jan 2022 french bakery burlington, ma. It was established in 1960, and based on the meter-kilogram-second system. Oakland middle school. WebChemistry. WebHow to calculate the binding energy of an electron and the radius of the inner electron path in an atom? In the eighth and ninth centuries of the Common Era (CE), Arab civilization flourished in the Middle East and Spain. Logic; English language The International System of Units (SI Units) is provided by the Bureau International des Poids et Mesures (BIPM). If an experiment calls for 0.500 mol \( CaCO_3 \), how many grams of pure calcium carbonate do we need? Suppose you want to convert four and a half hours to minutes. WebIntroduction to algebra - Despite the title, Introduction to Algebra delves deep into Algebra 2 territory, especially toward the end, both in the types of concepts it covers and \(6.02214076 * 10^{23}\) but the weight of each sample would be different. Your head, so that I can show the steps excruciatingly clearly. Eliminate the old named derived unit using its compound unit definition. If you use a little algebra, they are easy to answer. Module 1D HW.pdf. SmartConversion is an online resource that primarily provides free online unit conversion and calculation tools. The measurement of weight was based on the shi, which was equivalent to approximately 132 pounds. Webinterconverting compound si units calculator. [View the accompanying Lesson on Names & Formulas of Acidshere.] $$ = 50g $$. Table 1: Convert conventional and metric measurements Table 2: Selected laboratory tests and conversion factors a WebThe following formula is used to calculate a slant height. By the mid-eighteenth century, it was clear to nations who traded and exchanged scientific ideas that standardization of weights and measures was necessary. WebQuestion: LEKS-Jose Ortega - Learn Density Calculator p = m/V O MEASUREMENT interconverting compound SI units Convert the following measurement. Conventional to SI (multiply by) SI Units. g, lbs, stone, oz, ton etc.) What are the speed and direction of travel of the wave? Please select the number of significant digits of Output Value, Select Input and New Unit, both WebSI units - Conversion The International System of Units (abbreviated SI) is the modern form of the metric system. 1 picometer (pm) = 10 -12 meters. ALEKS - Interconverting compound SI units(1).pdf. The Mole is an amount unit similar to pair, dozen etc. Measurement & calculations are fundamental part of our life. WebHeight cm to in & ft. Kilograms to Pounds. SmartConversion is an online resource that primarily provides free online unit conversion and calculation tools. Select the current unit in the left column, the desired unit in the right column, and enter a value And has a feature to scan the math problems. Mole | Definition, Number, & Facts. It is used in The Review of Diabetic Studies. how often are general elections held in jamaica; allison transmission service intervals; hays county housing authority; golden dipt breading recipe; measuring communication effectiveness ppt; kim coles child; door county cherry vodka recipes; is object oriented programming overrated why is there a plague in thebes oedipus interconverting compound si units calculator. Look no further! Conversion Calculator. WebCalculators Acceleration Area Body Mass Index Date Duration Density Distance Force Mass Perimeter Surface Area Volume Planets and the Sun Distance from Earth Ellipticity (Flattening) Equatorial Radius Length of Day Mass Mean Density Mean Longitude Number of Natural Satellites Semimajor Axis Surface Area Surface Gravity Surface Pressure There are several categories and hundreds of units for choosing. ALEKS - Interconverting compound SI units(1).pdf. It is the intrinsic property of an element and is based on its Atomic Mass that is further based on the number of protons and neutrons in that element. Certain systems, such as the SI system of units, have different units for. We Answer! 12 g of Carbon(C) = 1 Mole of Carbon (C) = \(6.02214076 * 10^{23}\) number of Atoms The avoirdupois was equivalent to 7,000 grains, 256 drams of 27.344 grains each, or 16 ounces of 437 grains each. of the substance along with handling a large number of measurement units for mass (i.e. 25) bleach to one gallon To calculate LEL to ppm example Methane 100LEL. Power and Heat Flow. You can view more details on each measurement unit: gallon or gram The SI. You can view more details on each measurement unit: gallon or gram The SI. However, no need to worry because we have got your back with our Molar Mass Calculator that does particular conversions. It reports the standard base units of meter, kilogram, second, kelvin, ampere, mole, and candela. These are termed the conventional or US units. First, we can either convert the kilometers or meters OR the hour to seconds; mathematically, it works out the same. order now Convert Units Enhance your scholarly performance GET SERVICE INSTANTLY You Request? Calculate the number of moles of aluminum present in Although they are not official base metric (SI) units, this calculator also reports radians and steradians for clarity. Although its main feature is to convert moles to grams, it also has an added benefit of determining the number of constituent particles in each sample, thus, it has a functionality of a moles to molecules calculator as well. For example, you wouldnt measure the distance from LA to New York in meters, the base unit. Chemistry questions and answers. Conversion table for chemical compounds from conventional to SI units $$ = \frac {13.5}{27} = 0.5 Moles $$, Calculate the number of moles of magnesium oxide, MgO in Q&A. $$ \text{Molar Mass} = \frac{Mass}{\text{Number of Moles}} $$ No responsibility is taken for the correctness of this information. (Opens a modal) Metric units of mass review (g and kg) (Opens a modal) Metric units of length review (mm, cm, m, & km) (Opens a modal) Metric units of volume review (L and mL) (Opens a modal) U.S. atoms, molecules etc.) Conversion Calculator. WebChemistry. How to Calculate Moles Using this Calculator? No need to be fancy, just an overview. In the past, many systems of measurement were defined on a local level, and could be based on factors as arbitrary as the length of a king's thumb. Number of constituent particles of the substance (i.e.Select Mass from the drop down menu titled Calculate. We Answer! Table 3. WebSI Unit Conversion Table. These base units can be combined with any of the prefixes to create units that are most appropriate for what is being measured. If 5 moles of NaCl weigh 292.2 g, what is the molar mass of table salt? Length. g, lbs, stone, oz, ton etc.) Pounds to Kilograms. WebHow to calculate the binding energy of an electron and the radius of the inner electron path in an atom? WebConvertUnits.com provides an online conversion calculator for all types of measurement units. In 1790, Charles Maurice de Talleyrand-Perigord, the Prince of Talleyrand, approached the British (represented by John Riggs-Miller) and the Americans (represented by Thomas Jefferson) with proposals to define a common standard of length based on the length of a pendulum. Dr. Kent McCorkle, or "Dr. Kent' to his student, has helped thousands of students be successful in chemistry. Encyclopedia Britannica. (b) 13.5 g of the element, As per the periodic table, relative atomic mass of Aluminum (Al) = 27, $$ \text{Number of Moles} = \frac{Mass}{\text{Molar Mass}}$$ Mass of 1 mole of \(CO_{2}\): Find below a chemical conversion table containing chemical compounds with factors for conversion from conventional to SI units as well as a calculator for conversions of all listed chemicals and substances. WebLooking for Interconverting compound si units calculator? As per the periodic table, relative atomic masses of Carbon (C) = 12, Oxygen (O) = 16 and Calcium (Ca) = 40. \(6.02214076 * 10^{23}\). Copyright 2014 GetChemistryHelp.com All Rights Reserved | L = SQRT ( H^2 + (S/2)^2) Where L is the slant height; S is the length of any side (Use the diameter at the base for a Interconverting compound si unit calculator. $$ \text{Number of Moles} = \frac{Mass}{\text{Molar Mass}}$$ The only difference is that we are converting more than one unit now. This number is called Avogadros Number or Avogadros Constant and is named after an Italian scientist Amedeo Avogadro. Although they are not official base metric (SI) units, this calculator also reports radians and steradians for clarity. SI units to Conventional units. 2. g, lbs, stone, oz, ton etc.) We are asked to convert km/hour into m/s. $$ \text{Molar Mass} = 58.44 \frac{g}{mol} $$. If you want to convert 60 miles to If youre in a car moving at 60 miles an hour, is that faster or Example 4: square feet to square meters. (b) 10 g of the compound, As per the periodic table, relative atomic mass of Oxygen (O) = 16 and Magnesium (Mg) = 24, Mass of 1 Mole of MgO: Ten dirhems comprised a Wukryeh, which was translated into Latin as an "uncia" the origin of the word "ounce.". For instance: The SI or International System of Unit of force is the derived unit newton or N A Newton (N) is equal to 1 m. kg/s2 You can use derived unit measurement calculator to get the instant and error-free measurements conversion. SI Unit Conversion Calculator The International System of Units (SI Units) is provided by the Bureau International des Poids et Mesures (BIPM). It was not until 1799, however, that the metric system was officially adopted in France, though it was still not universally observed across the country. Number of constituent particles of the substance i.e.Select Moles from the drop down menu titled Calculate. Select the current unit in the left column, the desired unit in the right column, and enter a value Webcandela per square meter. Question 1: The wave function for a traveling wave on a taut. Using the Arrhenius equation to calculate k at one temperature from k at another Using the Arrhenius equation to calculate Ea from k versus T data Section 18-6 (1 topic) $$ = \text{number of moles} * \text{molar mass} $$ The intent of this site is to provide a convenient means to convert between the various units of measurement within different systems, as well as to provide a basic understanding of the systems currently in use, and how they interact. WebChemistry. The collection below includes glucose, which is also described in more detail here. This mole conversion calculator also helps you calculate molar mass of a substance using a similar mathematical approach but in less time. Obvious, right? After dividing, you have (Remember you can do this because you treat the unit hour just like a variable. The use of unit symbols is regulated by precise rules. Using this information, calculate Avogadro's number. $$ = 0.5 * 100 $$ How many moles of Acetic Acid \( (HC_{2}H_{3}O_{2}) \) in a 5.0 g sample of pure Acetic Acid? It was established in 1960, and based on the meter-kilogram-second system. Look no further! Meters to Feet (m to ft and in) Metric Units. First, we can either convert the kilometers or meters OR the hour to seconds; mathematically, it works out the same. WebFind the Units to Convert Common Conversions cm to inches kg to lbs Celsius to Fahrenheit mm to inches meters to feet km to miles cm to feet grams to ounces inches to feet liters to gallons pounds to ounces mph to kph acres to square feet radians to degrees hp to kw meters to yards mL to cups inches to cm lbs to kg Fahrenheit to Celsius Best app I ever download, but overall it's very helpful. $$ = \text{number of moles} * \text{molar mass} $$ Chemistry questions and answers. WebWe have two different sets of units to convert (km -> m & hour -> s) but the principles of unit analysis hold true. Select the current unit in the left column, the desired unit in the right column, and enter a value in the left column to generate the resulting conversion. Bromine has a density of 3.12 g/mL. SmartConversion is an online resource that primarily provides free online unit conversion and calculation tools. Type in unit symbols, abbreviations, or full names for units of length, area, mass, pressure, and other types. If we need to determine the mass of a substance, simply divide the given number of Moles of the Substance by the given Molar Mass. Our moles to molecules calculator also provides the number of formula units in case of ionic compounds. Though many countries used the pound from that point onward, including England (the British pound sterling, or GBP was equal to one pound-weight of silver in King Offa's time), the avoirdupois weight system was adopted during the reign of Queen Elizabeth in the 16th century. Table 1: Convert conventional and metric measurements Table 2: Selected laboratory tests and conversion factors a And has a feature to scan the math problems. The seven base units are represented different kinds of physical quantities. Over time, trade spread from the Mediterranean area to Europe, including the northern German City States. AU = arbitrary unit. You can view more details on each measurement unit: gallon or gram The SI. Acetaminophen (Datril, Tylenol), serum. Length. WebSI units - Conversion The International System of Units (abbreviated SI) is the modern form of the metric system. MATHEMATICS GEOMETRY. as well as for mole (i.e. WebUnit Conversion Calculator. WebUnits of measure converter | AMA Manual of Style | Oxford Academic Units of measure converter Enter a value below to perform a conversion. There are several categories and hundreds of units for choosing. This number may appear to be overwhelmingly large but you can easily determine the number of particles using this moles calculator. Subjects Mechanical Electrical Engineering Civil Engineering Chemical Engineering Electronics and Communication Engineering Mathematics Physics Chemistry Software Works/ Computer Science WebFree engineering unit converter tool featuring: Over 1,000 built-in units; 95 engineering properties; Multiple scientific notation systems; Ability to control significant digits; Choose from U.S. and metric (SI) units; Copy the Knovel Unit Converter URL to easily share conversions and custom units with colleagues or team members To do the conversion, simply multiply by that well-chosen form of 1: (Ill explain a little later why I divided through by 1hr and not 60min.) Eliminate the old named derived unit using its compound unit definition. WebInterconverting compound SI units Convert the following measurement. 3.3 107-012_-D *10 mol 3.3 10 11 kg m g'cm. Unit converter allows you to check all type of metric conversion of measurement units example: length, weight, height, area, temperature, time, pressure, speed, force, volume, data storage, fuel consumption, energy, degree, number converter, etc and also you can check online calculators basic & advanced math calculations like percentage, mortgage, fraction, interest rate, loan, tax, GST, tip, love, work, algebra, finance calculator and health calculator, etc. Kilometers, the conversion factor is 1.61, butverybody finds these questions confusing, not just students. Next, select the starting unit and enter a value in the FROM input. Convert Now Currency Area Calculators Volume Calculators Tips