Pythagorean Theorem Calculator
Find a missing side of a right triangle.
- 100% free
- Private in browser
- No signup
- No watermarks
Hypotenuse
5
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About Pythagorean Theorem Calculator
The Pythagorean theorem relates the sides of a right triangle: a² + b² = c². This calculator on TheToolss finds the hypotenuse from the two legs, or a missing leg when you know the hypotenuse and one leg. Choose what to solve for, enter the two known sides, and read the answer instantly. It is ideal for geometry, carpentry, and construction. It runs in your browser — free, private, and no signup.
How to use Pythagorean Theorem Calculator
- Choose whether to find the hypotenuse or a leg.
- Enter the two known sides.
- Read the missing side.
Key features
- Solve for hypotenuse or a leg
- Uses a² + b² = c²
- Validates hypotenuse > leg
- Works in any unit
- Private in-browser calculation
Frequently asked questions
- Is the Pythagorean Calculator free?
- Yes. It is free on TheToolss with no signup.
- What is the Pythagorean theorem?
- For a right triangle, the square of the hypotenuse equals the sum of the squares of the other two sides: a² + b² = c².
- How do I find a leg?
- Leg = √(c² − b²), where c is the hypotenuse and b is the known leg. Select “find a leg” to compute it.
- Why must the hypotenuse be longest?
- The hypotenuse is opposite the right angle and is always the longest side, so it must exceed either leg.
- Is my data uploaded?
- No. The calculation runs in your browser.
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