Unit Converter

Convert length, weight, and temperature values, entirely in your browser.

Processed locally — your files remain on this device

Processing… this happens entirely in your browser.

Result

Completed Completed with a note

How it works

  1. Choose a category: length, weight, or temperature.
  2. Enter a value and pick the units to convert from and to.
  3. The converted value updates as you type.

Supported formats & limitations

  • Length
    Millimeters through miles.
  • Weight
    Milligrams through pounds.
  • Temperature
    Celsius, Fahrenheit, and Kelvin.
  • Covers common everyday units, not specialized scientific or engineering unit systems.
  • Results are rounded to six decimal places.

Frequently asked questions

Is my input sent anywhere?

No, all conversion happens locally using simple arithmetic in your browser.

Why is temperature handled differently from length or weight?

Temperature scales don’t share a common zero point, so converting between them needs a formula rather than a simple multiplier.

Can I convert between categories, like weight to length?

No, only units within the same category (e.g. two length units) can be converted.

Troubleshooting

Why did the result disappear?

The value field is empty or isn’t a valid number — enter a numeric value to see a result again.

Why does a very large or small number look strange?

Extremely large or small results may display in a format your browser chooses for very long decimals — try a more typical input range.

Something not working as expected? Send feedback about this tool.