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Pythagoras Calculator

Enter your values below to get the result first, then scroll for the full explanation and guidance.

Step 1 • Add values

Use the calculator

Enter your values below to generate an instant result. You can update the inputs at any time to compare different scenarios.

Example: perpendicular sides 3 and 4 give hypotenuse 5.

Results refresh instantly as values change.

Hypotenuse

5Right triangle

Hypotenuse: 5 (Right triangle)

The hypotenuse is the square root of side A squared plus side B squared.

Pythagorean result

The hypotenuse is the square root of side A squared plus side B squared.

Result snapshot

A quick visual read of the values behind this result.

Side A3
Side B4

Recommended next checks

  • →Keep both perpendicular sides in the same unit.
Side A
3
Side B
4

Try different values to compare results.

Enter the two perpendicular sides of a right triangle to calculate its hypotenuse.

Fast to use

Built for comparison

Clear result output

Table of Contents

6

About Pythagoras Calculator

Pythagoras Calculator helps you work through the main numbers for this topic quickly with a simple input flow and an instant result.

Use the calculator result as a practical starting point, then review the explanation and assumptions on the page if you want more context.

Pythagorean formula

For a right triangle, c = sqrt(a squared + b squared), where c is the hypotenuse opposite the right angle.

Formula explained

Calculation flow

This calculator is structured for fast UK-focused estimates with clear inputs, repeatable logic, and instant results.

Formula

Input values -> calculation engine -> instant result

How the result is built

1Enter the values requested in the form.
2The calculator applies the configured formula logic.
3The result updates instantly with a breakdown.
4Use the output to compare scenarios quickly.

Example

Example: perpendicular sides 3 and 4 give hypotenuse 5.

Assumptions

  • The two entered sides meet at a 90-degree angle.
  • Both side lengths use the same unit.

Source basis

  • UK-focused calculator flow
  • Structured input validation
  • Instant result breakdowns

FAQ

Common questions

No. It requires a right triangle and the two entered sides must be perpendicular.

Trust and notes

Assumptions and important notes

This calculator is designed to give a fast estimate using the method shown on the page. Results are most useful when your inputs are accurate and the tool matches your situation.

Use the result as guidance rather than a final diagnosis or professional decision. If the result could affect health, legal, financial, or compliance decisions, verify it with a qualified source where appropriate.

  • The two entered sides meet at a 90-degree angle.
  • Both side lengths use the same unit.

Method

UK calculator guidance

Last reviewed

April 17, 2026