## Metric/English Conversion Factors

### English to Metric

LENGTH (Approximate)

1 inch (in) = 2.5 centimeters (cm)
1 foot (ft) = 30 centimeters (cm)
1 yard (yd) = 0.9 meter (m)
1 mile (mi) = 1.6 kilometers (km)

AREA (Approximate)

1 square inch (sq in, in2) = 6.5 square centimeters (cm2)
1 square foot (sq ft, ft2) = 0.09 square meter (m2)
1 square yard (sq yd, yd2) = 0.8 square meter (m2)
1 square mile (sq mi, mi2) = 2.6 square kilometers (km2)
1 acre = 0.4 hectare (he) = 4,000 square meters (m2)

MASS-WEIGHT (Approximate)

1 ounce (oz) = 28 grams (gm)
1 pound (lb) = 0.45 kilograms (kg)
1 short ton = 2,000 pounds (lb) = 0.9 tonne (t)

VOLUME (Approximate)

1 teaspoon (tsp) = 5 milliliters (ml)
1 tablespoon (tbsp) = 15 milliliters (ml)
1 fluid ounce (fl oz) = 30 milliliters (ml)
1 cup (c) = 0.24 liter (l)
1 pint (pt) = 0.47 liter (l)
1 quart (qt) = 0.96 liter (l)
1 gallon (gal) = 3.8 liters (l)
1 cubic foot (cu ft, ft3) = 0.03 cubic meter (m3)
1 cubic yard (cu yd, yd3) = 0.76 cubic meter (m3)

TEMPERATURE (Exact)

[ (x - 32) (5 / 9) ] °F = y  °C
(x + 460) / 1.8 = y  °K

PRESSURE (Exact)

1 psi = 6.8948 k Pa

ENERGY & ENERGY DENSITY (Exact)

1 Btu = 1.05506 kJ
1 Btu/lb = 2.326 kJ/kg

### Metric to English

LENGTH (Approximate)

1 millimeter (mm) = 0.04 inch (in)
1 centimeter (cm) = 0.4 inch (in)
1 meter (m) = 3.3 feet (ft)
1 meter (m) = 1.1 yards (yd)
1 kilometer (km) = 0.6 mile (mi)

AREA (Approximate)

1 square centimeter (cm2) = 0.16 square inch (sq in, in2)
1 square meter (m2) = 1.2 square yards (sq yd, yd2)
1 square kilometer (km2) = 0.4 square mile (sq mi, mi2)
10,000 square meters (m2) = 1 hectare (he) = 2.5 acres

MASS-WEIGHT (Approximate)

1 gram (gm) = 0.036 ounce (oz)
1 kilogram (kg) = 2.2 pounds (lb)
1 tonne (t) = 1,000 kilograms (kg) = 1.1 short tons

VOLUME (Approximate)

1 milliliter (ml) = 0.03 fluid ounce (fl oz)
1 liter (l) = 2.1 pints (pt)
1 liter (l) = 1.06 quarts (qt)
1 liter (l) = 0.26 gallon (gal)
1 cubic meter (m3) = 36 cubic feet (cu ft, ft3)
1 cubic meter (m3) = 13 cubic yards (cu yd, yd3)

TEMPERATURE (Exact)

[ (9 / 5) y + 32] °C = x °F
(y x 1.8 B 460) = x °F

PRESSURE (Exact)

1 M Pa = 145.04 psi

ENERGY & ENERGY DENSITY (Exact)

1 MJ = 947.81 Btu
1 MJ/kg = 430 Btu/lb