Quick, correct answers to common number questions, with the working shown so you understand the result rather than just copying it.
Whether you are working out a discount, a change between two figures or the average of a list of scores, these calculators handle decimals and negative numbers and tell you clearly when an input does not make sense.
Calculations use standard double-precision arithmetic. Results are rounded only for display, and sums are added with compensation so values such as 0.1 + 0.2 appear as 0.3 instead of 0.30000000000000004.
Where a negative value makes sense, such as a drop in value in the percentage change calculator, it is accepted. Where it cannot be valid, you will see a message that explains what range is allowed.
Yes. Each calculator shows its formula, and the results include the calculation steps so you can follow or check them by hand.
Disclaimer: This calculator provides estimates for informational purposes only. Check important results independently before relying on them.
