SHAPES, DATA, AND SCHOOL MATH
Geometry & Statistics Calculators
Solve high-demand U.S. geometry and statistics tasks with formulas, intermediate values, and classroom-friendly explanations.
Choose a calculator
Open a tool and adjust its assumptions for your situation.
Shapes and triangles
Area, perimeter, circles, right triangles, and Pythagorean checks.
Area and Perimeter CalculatorCalculate area and perimeter for common two-dimensional shapes.Circle CalculatorCalculate circle area, circumference, and diameter from radius.Pythagorean Theorem CalculatorFind a right triangle hypotenuse from two perpendicular legs.Right Triangle CalculatorFind the hypotenuse, acute angles, area, and perimeter from two legs.
Statistics and probability helpers
Random integers, data summaries, spread, and standardized values.
Random Number GeneratorGenerate one or more random whole numbers inside an inclusive range.Mean, Median, Mode and Range CalculatorSummarize a comma-separated data set in one calculation.Standard Deviation CalculatorCalculate population or sample standard deviation and variance.Z-Score CalculatorExpress a value as standard deviations above or below a mean.
Before you use these estimates
Use the units and population-or-sample convention required by your assignment. These tools show arithmetic methods, but a teacher, textbook, survey method, or professional standard may require different rounding or interpretation.