Unit Converter
Convert length, weight, temperature, volume, speed, area, and data sizes — instantly, in your browser.
1 millimeter = 0.1 centimeters
Popular conversions
How It Works
Pick a category
Choose length, weight, temperature, and more.
Enter a value
Type the number and select the from/to units.
Get the result
The converted value appears instantly. Swap units with one click.
Frequently Asked Questions
Is this unit converter free?+
Yes, completely free with no signup, no limits, and no watermark. Convert as many values as you like.
How accurate are the conversions?+
Conversions use exact internationally-defined factors (for example, 1 inch = 2.54 cm exactly). Results are rounded to 6 significant figures for readability.
Does it work offline / is my data private?+
All calculations run entirely in your browser. Nothing is sent to a server, and once the page has loaded it keeps working without a connection.
What units can I convert?+
Length, weight/mass, temperature, volume, speed, area, and digital storage — with the common metric and imperial units for each.