Summary
Solve for a right-triangle hypotenuse or missing leg.
Calculation details
Choose whether to solve for the hypotenuse or a leg. Calculations retain raw JavaScript number precision; display values are rounded to at most six decimal places.
Formula
c = √(a² + b²); leg = √(c² − a²).
Worked example
Pythagorean Theorem Calculator example
Hypotenuse is 5.
How it works
Choose hypotenuse or missing-leg mode, then enter the two known positive sides of a right triangle.
Frequently asked questions
How accurate is the Pythagorean Theorem Calculator?
The calculation keeps raw numeric precision and rounds only the displayed result to at most six decimal places.
What should I do with an invalid result?
Check that every visible value is finite and that no required divisor is zero.