Pythagorean Theorem Calculator

Calculate hypotenuse c = √(a² + b²) of a right triangle from leg lengths a and b.

How It Works & Processing Standards

Enter values above to calculate results automatically. Check each input field for guidance and units.

Example: a=3, b=4 → 5

Your input data is never sent to any server and is securely processed on your device.

Current Limits

  • Maximum input length: 100,000 characters

Pythagorean Theorem Calculator is a 100% free, browser-based online utility. All calculations and file conversions run locally inside your browser (Local-First) without sending data to remote servers, keeping your documents and inputs strictly private.

How to Use Pythagorean Theorem Calculator

  1. 1
    Enter Leg aType the first perpendicular side length.
  2. 2
    Enter Leg bType the second perpendicular side length.
  3. 3
    Compute Hypotenuse (c)Evaluate √(a² + b²).

Common Use Cases

  • Squaring building foundations in carpentry (3-4-5 rule)
  • Calculating straight-line distance across diagonal plots
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