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14 tools — Percentages, fractions, averages, ratios and everyday math — solved instantly with the formula explained.
Calculate what X% of Y equals, and see the value after adding or removing that percentage.
Use calculatorFind the percentage increase between an old value and a new, larger value.
Use calculatorFind the percentage decrease between an old value and a new, smaller value.
Use calculatorAdd, subtract, multiply and divide fractions with automatic simplification.
Use calculatorCalculate the mean and median of any set of numbers, separated by spaces or commas.
Use calculatorSimplify a ratio and solve proportions like a:b = c:x for the missing value.
Use calculatorFind the square root of any non-negative number, plus its square and cube root.
Use calculatorRaise any base to any power, including negative and fractional exponents.
Use calculatorCompute sample and population standard deviation, variance and mean for a data set.
Use calculatorConvert favorable outcomes and total outcomes into a probability, percentage and odds.
Use calculatorFind the least common multiple of two whole numbers, with the GCD shown too.
Use calculatorFind the greatest common factor of two whole numbers using the Euclidean algorithm.
Use calculatorA full scientific calculator with trigonometry, logarithms, powers and parentheses.
Use calculatorGenerate truly even random numbers within any range, with optional uniqueness.
Use calculatorPercentages, fractions, averages, ratios and everyday math — solved instantly with the formula explained.
Use these math calculators to compare scenarios with the formula visible on every tool. Each calculator includes a worked example so you can verify the inputs and understand what changes the result.
Results are planning estimates from standard formulas. For medical, financial, legal or structural decisions, use the calculator as a starting point and confirm important decisions with a qualified professional.
| Calculator | What It Does |
|---|---|
| Percentage Calculator | Calculate what X% of Y equals, and see the value after adding or removing that percentage. |
| Percentage Increase Calculator | Find the percentage increase between an old value and a new, larger value. |
| Percentage Decrease Calculator | Find the percentage decrease between an old value and a new, smaller value. |
| Fraction Calculator | Add, subtract, multiply and divide fractions with automatic simplification. |
| Average Calculator | Calculate the mean and median of any set of numbers, separated by spaces or commas. |
| Ratio Calculator | Simplify a ratio and solve proportions like a:b = c:x for the missing value. |
| Square Root Calculator | Find the square root of any non-negative number, plus its square and cube root. |
| Exponent Calculator | Raise any base to any power, including negative and fractional exponents. |
| Standard Deviation Calculator | Compute sample and population standard deviation, variance and mean for a data set. |
| Probability Calculator | Convert favorable outcomes and total outcomes into a probability, percentage and odds. |
| LCM Calculator | Find the least common multiple of two whole numbers, with the GCD shown too. |
| GCF Calculator | Find the greatest common factor of two whole numbers using the Euclidean algorithm. |
| Scientific Calculator | A full scientific calculator with trigonometry, logarithms, powers and parentheses. |
| Random Number Generator | Generate truly even random numbers within any range, with optional uniqueness. |