Pythagoras Theorem Calculator
Solve any right-triangle side using a² + b² = c². Choose what to solve for — hypotenuse or either leg. Also computes area, perimeter, and angles A & B.
a² + b² = c² for any right triangle, where c is the hypotenuse (longest side, opposite the 90° angle).What powers the Pythagoras Theorem Calculator
Solve hypotenuse or either leg
Triangle area (½·a·b)
Perimeter
Angles A and B (degrees)
Validates leg < hypotenuse
Why the Pythagoras Theorem Calculator is different
Browser-native
The Pythagoras Theorem Calculator runs entirely in your browser. Input is processed locally — never uploaded, never logged, never cached anywhere outside your device.
No artificial limits
No daily quotas, no character ceilings, no "upgrade for more" walls. Every feature is the complete feature — the same on the first use as the thousandth.
Production-grade quality
Built to the same engineering bar as paid SaaS tools — accurate algorithms, audited logic, responsive design and accessibility-tested interactions.
Common use contexts
- Geometry homework
- Construction / carpentry layout
- Engineering quick-check
- Distance between points (planar)
Private and secure
Zero upload
All processing happens in your browser. Input is never transmitted, logged or cached.
Works offline
Once the page loads, the tool runs without an internet connection. No network calls happen during use.
No tracking
No accounts, no cookies for tool state. Only aggregate analytics count visits at the page level.