Approximate Conversions From Customary To Metric

When You Have

Multiply By

To Get

Length

Inches

25.4

Millimeters

2.5

Centimeters

Feet

300

30

.3

Meters

Area

Square inches

645.16

Square millimeters

6.4516

Square centimeters

Square feet

0.09

Square meters

Square yards

0.8

Weight (mass)

Ounces

28

Grams

Pounds

0.45

Kilograms

Volume

Cubic inches

16

Milliliters

Fluid ounces

Pints

0.47

Liters

Quarts

0.95

Gallons

3.8

Cubic feet

0.03

Cubic meters

Temperature

Degrees Fahrenheit

Subtract 32° Then multiply by 5/9

39.37

3.28

.393

.039

.0016

0.16

1.2

0.035

2.2

0.06

Cubic ounces

2.1

1.06

0.26

Degrees Celsius

Multiply by 9/5 and then add 32