SHAPES, DATA, AND SCHOOL MATH
Use a² + b² = c² to calculate the hypotenuse of a right triangle and review the squared-value check.
Your result
Enter your values and select Calculate. Your result stays on this device.
Hypotenuse c = √(a² + b²).
The two entered sides are perpendicular legs of a right triangle.
This Pythagorean theorem calculator is designed for the common “find the missing hypotenuse” search. It shows the input legs and squared-value check next to the answer.
Use case
Enter two right-triangle legs to calculate c with a² + b² = c² and review the values used in the answer.
Find the hypotenuse of a right triangle from two perpendicular legs and verify the squared-value relationship.
Build a reliable scenario
Pythagorean Theorem Calculator helps you check a specific geometry & statistics question with figures that apply to you. Use a² + b² = c² to calculate the hypotenuse of a right triangle and review the squared-value check. Enter two right-triangle legs to calculate c with a² + b² = c² and review the values used in the answer. Find the hypotenuse of a right triangle from two perpendicular legs and verify the squared-value relationship. The page keeps the method and limits visible so the result can be understood, compared, and checked instead of treated as an unexplained answer.
Prepare Leg a and Leg b. Enter the first perpendicular leg. Enter the second perpendicular leg in the same unit. Calculate the hypotenuse. Square the displayed result to verify it against a² + b² when completing school work. Keep units, dates, currency, and time periods consistent.
The stated method is: Hypotenuse c = √(a² + b²). Change one assumption at a time to see which input drives the result, then compare scenarios on the same basis.
The two entered sides are perpendicular legs of a right triangle. Check the input and rounding, then calculate again.
Method and update
Last reviewed: 2026-08-22. This tool performs the stated formula locally in your browser using the values you enter.
For a right triangle, the sum of the squares of the two legs equals the square of the hypotenuse: a² + b² = c².
No. The relationship applies to right triangles.
For legs 3 and 4, the hypotenuse is 5.
Keep exploring
Clear calculation guide
This free Pythagorean Theorem Calculator keeps the values and the calculation method visible instead of returning an unexplained number. Use a² + b² = c² to calculate the hypotenuse of a right triangle and review the squared-value check. Use it to check a scenario with the figures that apply to you.
Start by checking units, dates, decimal places, and the option you selected. This Pythagorean theorem calculator is designed for the common “find the missing hypotenuse” search. It shows the input legs and squared-value check next to the answer. The stated mathematical method is: Hypotenuse c = √(a² + b²).
Change one assumption at a time to understand what moves the result, then keep any final record or institution-specific rule separate from the arithmetic. The two entered sides are perpendicular legs of a right triangle. Hesaplayın is a clear, browser-based calculator for checking the maths behind your decision.