It supports fractions, complex numbers and custom functions. It has an expression history so you can review your previous steps. You can also update a previous expression and all following expressions are updated automatically. A useful resource for students and teachers of mathematics.
The latest addition to Alcula's statistics calculators: Use your data to generate and plot the equation for the line of best fit and use the equation to make predictions.
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Create clean looking boxplots from data sets of up to 2000 observations.
Calculate percentage change. Add and subtract percentages. Answer questions like: How much is ... percent of ... ? What percentage of ... is ... ?
Started as a simple standard deviation calculator, it now also calculates mean (average), median, mode, variance, quartiles, inter quartile range and deviation, and mean absolute deviation. Like other calculators on this site, the statistics calculator will be expanded over the next few months, to include more common statistics formulas.
This Virtual Calculator emulates a real pocket calculator. It features basic operators and a virtual paper roll that displays your previous calculations. Type on your keyboard or use your mouse to press the buttons.
Suan Pan is the Chinese name for the Chinese abacus. It has two decks, the lower deck has 5 beads for each rod, the upper deck has two. The version of Suan Pan on this website has 18 rods, you can perform calculations with numbers up to 18 digits.
Soroban is the Japanese name for the Japanese abacus. Like the Chinese abacus, it has two decks, but the lower deck has 4 beads for each rod and the upper deck has only one. The Soroban on this site has 18 rods.
The abaci emulators require javascript to be enabled in your browser.
Select 'conversions' to go to the conversion pages. You can convert between many units of measure of length, area, weight or temperature.
How to work out the percentage of a number when using a calculator that is missing the percent (%) key.
The statistics calculator calculates standard deviation, averages, quartile deviation and more.

