🧮 Mathematics Workspace

Nine calculation modes covering percentages, averages, median, population deviation and whole-number arithmetic.

Choose a calculation

Results update as you type. Use Reset current mode to restore the example. Copy mode link shares the selected formula, not your entered values. Display precision changes presentation only.

Available calculations

What percent Percent of Percent change Mean Ratio Median Population standard deviation Greatest common divisor Least common multiple

Formula, standards and limitations

Percentage change is (new − original) ÷ absolute(original) × 100, which defines a signed relative change for negative baselines. The mean is the sum of all supplied numbers divided by their count. Division by zero is not defined.

How to use this tool

Choose a calculation mode, enter valid inputs, and read the result. Each mode is linked from the directory. Calculations happen on your device, with no required account or paid API. Verify consequential financial or technical decisions independently.

Explore the full converter and calculator directory or all OpenToolKit tools.

Additional calculation notes

Population standard deviation divides by the number of observations, not N−1. Greatest common divisor and least common multiple accept safe whole numbers only.