Free Pythagorean Theorem Calculator
Find the missing side of a right triangle: a² + b² = c².
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Result
Hypotenuse c
5.0000
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Short answer
Find the missing side of a right triangle: a² + b² = c².
What is the Pythagorean Theorem Calculator?
Find the missing side of a right triangle: a² + b² = c².
How does the Pythagorean Theorem Calculator work?
Enter the inputs above and read the result.
Formula
Variables
a,bLegscHypotenuse
Explanation
Relation between the sides of any right triangle.
Examples
Applications
Advantages
Limitations
Common mistakes
Tips
Related concepts
The Pythagorean Theorem Calculator sits inside the Math Calculators hub, in the geometry & shapes cluster. Length, area, volume and angle in two and three dimensions. Understanding the terms below makes the output easier to interpret and easier to compare against neighbouring measures.
Practical use cases and industry applications
Understanding Pythagorean Theorem
Find the missing side of a right triangle: a² + b² = c². Within math calculators, pythagorean theorem belongs to the geometry & shapes cluster, where it shares terminology and assumptions with closely related tools.
Learning how pythagorean theorem is calculated
Relation between the sides of any right triangle. Working through the variables one at a time — a,b, c — makes the result reproducible by hand and easier to sanity-check.
Using pythagorean theorem to make a decision
Because outputs depend on the assumptions you enter, run more than one scenario before committing to a figure.
How pythagorean theorem compares with related measures
area, perimeter, volume, surface area all describe adjacent aspects of geometry & shapes. Comparing this calculator's output against those measures — using the related tools listed on this page — prevents a single metric from being read in isolation.
Frequently asked questions
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