Frequently asked questions
Do the calculators show the working?
Most do. You'll see the formula with your own numbers in it, so you can follow each step or check your homework.
Can I type Arabic digits?
Yes. ١٢٣ works the same as 123, and thousands commas are fine.
Which one should I use for statistics homework?
Start with mean, median and mode for averages, standard deviation for spread, and the statistics calculator for quartiles and outliers.
How precise are the answers?
They're worked out to about 15 significant digits and only rounded for display. For exact answers with huge whole numbers, use the big number calculator.
Is there a simple calculator for quick sums?
Yes, the basic calculator. Switch to the scientific calculator when you need powers, roots or trig.
Is anything I enter sent or stored?
No. Every calculation runs in your browser, and nothing you type is sent to us or saved.