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Unit Converter

Length, weight, volume, area and temperature with exact factors.

1 miles equals
1.609344 kilometers

How to use this tool

  1. Pick a measurement type.
  2. Enter a value and choose from and to units.
  3. Copy the result or share the link.

Formulas

Value in base unit = value x from factor; result = base / to factor.

Temperature uses offset formulas, for example F = C x 9/5 + 32.

Frequently asked questions

Are the factors exact?

Inch, foot, yard, mile, pound and ounce use their exact international definitions.

US or imperial gallons?

US gallons, quarts, cups and fluid ounces are used.

Why does changing type change my units?

Units are specific to a type, so the dropdowns reset to valid options.

Can I convert negative temperatures?

Yes.