About
Right Triangle Calculator is a free browser-based geometry tool that solves a complete right triangle from any two known values, including side lengths, the hypotenuse, an acute angle, or area. It calculates missing sides and angles along with perimeter, area, altitude, inradius, and circumradius, while showing a live diagram that updates as values change. The tool also includes Pythagorean theorem calculations, step-by-step working, common 3-4-5 and 5-12-13 triangle presets, and dedicated 30-60-90 and 45-45-90 triangle modes. Calculations are performed directly in the browser, making it useful for students, teachers, engineers, and anyone working with geometry or trigonometry.
Maker History
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Joined Product HuntOctober 1st, 2026
