- Enter 2 Sides — Leave one blank.
- Calculate — See missing side, area, perimeter, and angles.
Pythagorean Theorem Calculator
Calculate missing sides of a right triangle using a² + b² = c².
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Pythagorean Theorem Calculator — a² + b² = c²
Free Pythagorean theorem calculator. Find missing sides, area, perimeter, and angles — 100% client-side. 100% serverless.
🔒 100% Private
⚡ Completely Free
🌐 Runs in Browser
📦 Export Ready
⚡
Pythagorean Theorem Calculator — a² + b² = c²
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Frequently Asked Questions
Which side can be blank?
Any side — it calculates the missing one.
Does it show angles?
Yes, all three angles of the right triangle.
Is my data safe?
Yes. 100% in your browser.