Unit Converter

Free unit converter. Convert length, weight, temperature, volume, area, and speed between any units.

How the Unit Converter works

Most units are converted by multiplying the input value by a fixed conversion factor relative to a base unit (e.g., 1 mile = 1.60934 km). Temperature requires an affine transform instead of a simple multiplier—Celsius to Fahrenheit uses (°C × 9/5) + 32—because the zero points differ.

How to use the Unit Converter

  1. 1The unit converter is designed to be simple and fast.
  2. 2Select the category.
  3. 3Choose from and to units.
  4. 4Enter the value.
  5. 5Your result is shown immediately.

Examples

  • 1 mile = 1.609 km
  • 100°F = 37.78°C

Benefits

  • Completely free with no signup required.
  • Runs entirely in your browser for instant results and privacy.
  • Works on mobile, tablet and desktop.
  • Results can be copied with one click.

Frequently Asked Questions

Is the unit converter free to use?

Yes. The unit converter is 100% free, with no signup, no watermark and no hidden limits.

Does the unit converter store my data?

No. All calculations and processing happen locally in your browser. Nothing is uploaded to a server.

Does the unit converter work on mobile?

Yes. The unit converter is fully responsive and works on phones, tablets and desktop computers.

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