Triangle Calculator
Solve any triangle — enter any 3 known values to calculate all sides, angles, area, and properties
Known values
Fill in any 3 values (at least one side). Angles in degrees.
How to use
- SSS — enter all three sides (a, b, c)
- SAS — enter two sides and the angle between them (b, c, A) or (a, c, B) or (a, b, C)
- ASA / AAS — enter two angles and one side
- SSA — enter two sides and an opposite angle (primary solution given)
Frequently asked questions
What does Triangle Calculator do?
Solve any triangle — enter any 3 known values to calculate all sides, angles, area, and properties
What should I check in the result?
Check units, rates, dates and assumptions. Compare a simple case by hand before using the result for a decision.