Percentages, fractions, ratios, roots and a full scientific calculator.
Every percentage question in one place — with the steps written out, not just the answer.
How much did it change, and by what percent? Includes percentage difference, which is a different question.
Type the whole expression, not one keystroke at a time. Trig, logs, powers, roots, factorials and constants.
Fractions with the working shown — simplified, as a mixed number, as a decimal and as a percentage.
Simplify a ratio, scale it, or solve A : B = C : ? for the missing value.
Paste a list of numbers and get every summary statistic that matters — mean, median, mode, spread and quartiles.
Random numbers in any range — unique or repeating, one or a thousand, generated securely in your browser.
Every calculator in this category shows the formula it applies, so you can check the method rather than trusting a number. Results update as you type, and the share button encodes your inputs into the link so you can send a specific calculation to someone else.
Nothing you enter leaves your device. All 7 tools here run entirely in your browser.