Right triangle hypotenuse
Geometry / FREE CALCULATOR
Calculate the longest side of a right triangle.
Your answer starts here.
Enter your values and select Calculate to see the result and any available breakdown.
How to use this calculator
- Enter first perpendicular leg. Use the unit shown beside the field.
- Enter second perpendicular leg. Use the unit shown beside the field.
- Select Calculate and review the result. Select Reset to restore the example inputs.
How the calculation works
sqrt(First perpendicular leg*First perpendicular leg+Second perpendicular leg*Second perpendicular leg)
Worked example
First perpendicular leg = 3; Second perpendicular leg = 4. Result: 5 length units.
Understand your result
Calculate the longest side of a right triangle. The result is expressed in length units.
Assumptions and limitations
The entered sides must meet at a right angle. Results are rounded for display.
Questions about this tool
What does this tool calculate?
Calculate the longest side of a right triangle.
What should I check before using the answer?
The entered sides must meet at a right angle.
Related guides
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