Pythagorean theorem

Client

Enter two legs to get the hypotenuse—classic a² + b² = c² for right triangles.

About Pythagorean theorem

Compute hypotenuse c from legs a and b (√(a²+b²))—right-triangle math in your browser. The interactive transform on this page runs in your browser tab—Toolcore does not need your paste for the core operation described above.

How to use this page

Paste or type in the main workspace, run the primary action from the toolbar, then copy or download the result. Use Load example when the page offers it, or URL prefill (?q= / ?qb=) so agents and tickets open the same input.

c = 5 (√(3² + 4²))

Nearby workflows on Toolcore

  • Perfect square checker — Test whether a whole number is a perfect square and show its integer root—BigInt, local only. when units or numeric output should be checked on a related calculator.
  • Math expression evaluator — Evaluate basic + − × ÷ arithmetic with parentheses in your browser—no variables. when units or numeric output should be checked on a related calculator.
  • Quadratic equation solver — Solve ax² + bx + c = 0 with discriminant—real or complex roots, computed in your browser. when units or numeric output should be checked on a related calculator.
  • Percentage calculator — Percent of a value, ratio to percent, and percent change—no server round-trip. when units or numeric output should be checked on a related calculator.

Common use cases

  • Find diagonal lengths from width and height.
  • Check 3-4-5 style triples in geometry homework.

Common mistakes to avoid

  • Using the hypotenuse as a leg

    This form expects the two shorter legs a and b.

FAQ

Negative lengths?

Legs must be positive numbers.

Is data uploaded?

No. Math runs locally.

More tools

Related utilities you can open in another tab—mostly client-side.