Biology of Humans

Metric-English System Conversions

Length

1 inch (in.) = 2.54 centimeters (cm)

1 centimeter (cm) = 0.3937 inch (in.)

1 foot (ft) = 0.3048 meter (m)

1 meter (m) = 3.2808 feet (ft) = 1.0936 yard (yd)

1 mile (mi) = 1.6904 kilometer (km)

1 kilometer (km) = 0.6214 mile (mi)

Volume

1 cubic inch (in.3) = 16.39 cubic centimeters (cm3 or cc)

1 cubic centimeter (cm3 or cc) = 0.06 cubic inch (in.3)

1 cubic foot (ft3) = 0.028 cubic meter (m3)

1 cubic meter (m3) = 35.30 cubic feet (ft3) = 1.3079 cubic yards (yd3)

1 fluid ounce (oz) = 29.6 milliliters (mL) = 0.03 liter (L)

1 milliliter (mL) = 0.03 fluid ounce (oz) = 4 teaspoon (approximate)

1 pint (pt) = 473 milliliters (mL) = 0.47 liter (L)

1 quart (qt) = 946 milliliters (mL) = 0.9463 liter (L)

1 gallon (gal) = 3.79 liters (L)

1 liter (L) = 1.0567 quarts (qt) = 0.26 gallon (gal)

Area

1 square inch (in.2) = 6.45 square centimeters (cm2)

1 square centimeter (cm2) = 0.155 square inch (in.2)

1 square foot (ft2) = 0.0929 square meter (m2)

1 square meter (m2) = 10.7639 square feet (ft2) = 1.1960 square yards (yd2)

1 square mile (mi2) = 2.5900 square kilometers (km2)

1 acre (a) = 0.4047 hectare (ha)

1 hectare (ha) = 2.4710 acres (a) = 10,000 square meters (m2)

Mass

1 ounce (oz) = 28.3496 grams (g)

1 gram (g) = 0.03527 ounce (oz)

1 pound (lb) = 0.4536 kilogram (kg)

1 kilogram (kg) = 2.2046 pounds (lb)

1 ton (tn), U.S. = 0.91 metric ton (t or tonne)

1 metric ton (t or tonne) = 1.10 tons (tn), U.S.

Metric Prefixes

Prefix

Abbreviation

Meaning

giga-

G

109 = 1,000,000,000

mega-

M

106 = 1,000,000

kilo-

k

103 = 1,000

hecto-

h

102 = 100

deka-

da

101 = 10

100 = 1

deci-

d

10-1 = 0.1

centi-

c

10-2 = 0.01

milli-

m

10-3 = 0.001

micro-

m

10-6 = 0.000001