Triangle Calculator
Solve any triangle from any 3 valid measurements — sides, angles, or a mix — and instantly see all missing sides, angles, area, and perimeter.
About the Triangle Calculator
Given any combination of three values that defines a unique triangle (SSS, SAS, ASA, or AAS), this calculator returns every remaining measurement using the Law of Sines and Law of Cosines.
Heron's formula computes the area from the three sides. The perimeter is simply the sum of the sides.
Frequently asked questions
Side-Side-Side (SSS), Side-Angle-Side (SAS), Angle-Side-Angle (ASA), and Angle-Angle-Side (AAS). You must provide at least one side.
More math calculators
Scientific Calculator
Trigonometry, logarithms, exponents, and more.
Percentage Calculator
Solve any percentage problem in one click.
Fraction Calculator
Add, subtract, multiply, divide, and simplify fractions.
Random Number Generator
Generate random numbers in any range, with or without duplicates.
Standard Deviation Calculator
Mean, variance, and population or sample standard deviation.