Approximate Conversions From Customary To Metric

When You
Have

Multiply By

To Get

Length

Inches

25.4

Millimeters

Inches

2.5

Centimeters

Feet

300

Millimeters

Feet

30

Centimeters

Feet

.3

Meters

Area

Square inches

645.16

Square millimeters

Square inches

6.4516

Square centimeters

Square feet

0.09

Square meters

Square yards

0.8

Square meters

Weight (mass)

Ounces

28

Grams

Pounds

0.45

Kilograms

Volume

Cubic inches

16

Milliliters

Fluid ounces

30

Milliliters

Pints

0.47

Liters

Quarts

0.95

Liters

Gallons

3.8

Liters

Cubic feet

0.03

Cubic meters

Temperature

Degrees Fahrenheit

Subtract 32° Then multiply by 5/9

When You
Have

Multiply
By

To Get

Length

Meters

39.37

Inches

Meters

3.28

Feet

Centimeters

.393

Inches

Millimeters

.039

Inches

Area

Square millimeters

.0016

Square inches

Square centimeters

0.16

Square inches

Square meters

1.2

Square yards

Weight (mass)

Grams

0.035

Ounces

Kilograms

2.2

Pounds

Volume

Milliliters

0.03

Fluid ounces

Milliliters

0.06

Cubic ounces

Liters

2.1

Pints

Liters

1.06

Quarts

Liters

0.26

Gallons

Temperature

Degrees
Celsius

Multiply by 9/5 and then add 32

Degrees
Fahrenheit