Math Tools

Percentages, averages, ratios, correlation, sample-size estimates, GCD, LCM and everyday number problems.

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Percentages, averages, ratios, GCD, LCM and everyday number problems.

9 current toolsFree to openWorks on mobile
123Math Tools
Basic CalculatorHandle everyday arithmetic and expressions.
x²Math Tools
Quadratic Equation CalculatorSolve quadratic equations and inspect the roots.
%Math Tools
Percentage CalculatorCalculate percentages, ratios and percentage change.
x̄Math Tools
Average CalculatorCalculate the arithmetic mean.
:Math Tools
Ratio CalculatorSimplify a positive whole-number ratio.
GMath Tools
GCD CalculatorFind the greatest common divisor.
LMath Tools
LCM CalculatorFind the least common multiple.
rMath Tools
Correlation Coefficient CalculatorCalculate Pearson correlation for paired numeric data.
nMath Tools
Sample Size CalculatorEstimate a simple survey sample size for a proportion.

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