Mathematics

All 13 calculators in Mathematics at a glance — Ratio & Proportion Calculator, Fraction Calculator, Area Calculator and more. Free, instant, no signup.

Ratio & Proportion Calculator

Rule of three: direct & inverse proportion

Fraction Calculator

Fractions +−×÷ with auto-simplification & decimal display

Area Calculator

Area for 6 geometric shapes: triangle, trapezoid, circle & more

Roman Numerals Converter

Arabic ↔ Roman numerals, 1–3999

Average Calculator: Mean, Median & Mode

Mean, median & mode from comma-separated numbers

Circle Calculator

Radius, diameter, circumference & area – enter any value

Standard Deviation Calculator

Standard deviation & variance for population & sample

Triangle Calculator

Sides, angles, area & perimeter – SSS, SAS, ASA, AAS, Pythagoras

Random Number Generator

Random numbers in any range, with or without repeats, plus a dice roller and coin flip

Volume Calculator

Volume and surface area of a cube, box, cylinder, sphere, cone, pyramid, prism and more

Distance Formula Calculator

Distance between two points in 2D or 3D with the distance formula, step by step

Midpoint Calculator

Midpoint of two points with the midpoint formula, or the missing endpoint from a midpoint

Slope Calculator

Slope of a line through two points, with slope-intercept form, point-slope form and angle

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