 An official website of the United States government Official websites use .gov
A .gov website belongs to an official government organization in the United States. Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

# Approximate Conversions from U.S. Customary Measures to Metric

## Share

The numerical value of the units in the When You Know column are multiplied by the approximate unit conversion factor found in the Multiply By column to obtain a numerical value for the units listed in the To Find Column. For example:

When You Know Multiply By To Find
20 yd 0.91 approximately 18.2 m

## Length

Symbol When You Know Multiply By To Find Symbol
in inch 2.54 centimeter cm
ft foot 30.48 centimeter cm
yd yard 0.91 meter m
mi mile 1.61 kilometer km

### Area

Symbol When You Know Multiply By To Find Symbol
in² square inch 6.45 square centimeter cm²
ft² square foot 0.09 square meter
yd² square yard 0.84 square meter
mi² square mile 2.59 square kilometer km²
acre 0.41 hectare ha

### Mass (weight)

Symbol When You Know Multiply By To Find Symbol
oz ounce 28.35 gram g
lb pound 0.45 kilogram kg
short ton
(2000 lb)
0.91 metric ton t

### Volume

Symbol When You Know Multiply By To Find Symbol
tsp teaspoon 4.93 milliliter mL
Tbsp tablespoon 14.79 milliliter mL
in³ cubic inch 16.39 milliliter mL
fl oz fluid ounce 29.57 milliliter mL
c cup 0.24 liter L
pt pint, liquid 0.47 liter L
qt quart, liquid 0.95 liter L
gal gallon 3.79 liter L
ft³ cubic foot 0.03 cubic meter
yd³ cubic yard 0.76 cubic meter

### Temperature (exact)

Symbol When You Know Calculation To Find Symbol
°F degree Fahrenheit subtract 32, then
divide by 1.8
degree Celsius °C
°F  degree Fahrenheit subtract 32, divide by 1.8, add 273.15 Kelvin K

Metric to U.S. Customary Conversions