Pythagorean Theorem Calculator
Find the hypotenuse of a right triangle from its two legs.
Calculate
Enter your values below.
Result
Hypotenuse (c)
0
Formula used
a² + b² = c² → c = √(a² + b²)
Example: a=6, b=8 → c=10.
How to use this calculator
- Enter Leg a, Leg b.
- Press Calculate to see your result instantly.
FAQ
Frequently asked questions
What is the Pythagorean theorem?
It relates the three sides of a right triangle: the square of the hypotenuse equals the sum of the squares of the other two sides.
Does this only work for right triangles?
Yes, the Pythagorean theorem is specific to right triangles.
Can I find a leg instead of the hypotenuse?
Use the Right Triangle Calculator, which provides a fuller breakdown, or rearrange this formula: a = √(c² − b²).
Where is this theorem used?
Construction, navigation, and any calculation involving straight-line distance between perpendicular measurements.