CalcTriangle

The easiest right triangle calculator for carpenters, DIYers, and builders. Enter any two measurements — get every side, angle, area, and perimeter instantly.

CalcTriangle is an easy-to-use right triangle calculator built for carpenters, builders, and DIYers.

Enter any two sides, or one side and one angle, then tap Calc — CalcTriangle solves the rest and shows all sides, angles, area, and perimeter.

Features: • Supports feet, inches, and fractions (down to 1/16") — perfect for construction • Metric mode with centimeters, millimeters, and meters • Tap a field on the triangle to select it, then type your measurement • Foot/Inch buttons with a fraction picker wheel for precise imperial entry • Mode button cycles through display units • Save and load triangles for quick reference on the job site • Clean, simple interface designed for big fingers and bright sunlight

Completely rewritten in Swift for iOS 18. Fast, modern, and reliable.