| To Convert |
To |
Multiply by |
| Length |
| inches |
millimeters |
25.4 |
| inches |
feet |
0.0833 |
| feet |
inches |
12* |
| feet |
meters |
0.3048 |
| feet |
yards |
0.3333 |
| feet |
miles (U.S. statute) |
0.0001894 |
| yards |
yards |
3* |
| yards |
miles (U.S. statute) |
0.0005682 |
| miles (U.S. statute) |
feet |
5280* |
| miles (U.S. statute) |
yards |
1760* |
| miles (U.S. statute) |
meters |
1609 |
| miles (U.S. statute) |
nautical miles |
0.868 |
| meters |
feet |
3.281 |
| meters |
yards |
1.094 |
| meters |
miles (U.S. statute) |
0.0006214 |
| nautical miles |
miles (U.S. statute) |
1.152 |
| Area |
| square inches |
square centimeters |
6.452 |
| square inches |
square feet |
0.006944 |
| square feet |
square inches |
144* |
| square feet |
square meters |
0.09290 |
| square meters |
square feet |
10.76 |
| square miles |
square yards |
3,097,600* |
| square yards |
square feet |
9* |
| Volume |
| cubic inches |
cubic centimeters |
16.39 |
| cubic inches |
cubic feet |
0.0005787 |
| cubic feet |
cubic inches |
1728* |
| cubic feet |
cubic meters |
0.02832 |
| cubic feet |
U.S. gallons |
7.481 |
| cubic meters |
cubic feet |
35.31 |
| liters |
quarts (U.S. liquid) |
1.057 |
| quarts (U.S. liquid) |
liters |
0.9463 |
| U.S. gallons |
barrels (petroleum) |
0.02381 |
| U.S. gallons |
cubic feet |
0.1337 |
| U.S. gallons |
Imperial gallons |
0.8327 |
| barrels (petroleum) |
U.S. gallons |
42* |
| Imperial gallons |
U.S. gallons |
1.201 |
| milliliters |
cubic centimeters |
1* |
| Time |
| seconds |
minutes |
0.01667 |
| seconds |
hours |
0.0002778 |
| seconds |
days |
0.00001157 |
| minutes |
seconds |
60* |
| minutes |
hours |
0.01667 |
| minutes |
days |
0.0006944 |
| hours |
seconds |
3600* |
| hours |
minutes |
60* |
| hours |
days |
0.04167 |
| Mass or Weight |
| pounds |
kilograms |
0.4536 |
| pounds |
short tons |
0.0005* |
| pounds |
long tons |
0.0004464 |
| pounds |
metric tons |
0.0004536 |
| tons (short) |
pounds |
2000* |
| tons (metric) |
pounds |
2205 |
| tons (long) |
pounds |
2240* |
| kilograms |
pounds |
2.205 |
| tonnes (metric tons) |
kilograms |
1000* |
| Energy |
| calories |
Btu |
0.003968 |
| calories |
joules |
4.187 |
| Btu (British Thermal Units) |
calories |
252.0 |
| Btu |
joules |
1055 |
| joules |
calories |
0.2388 |
| joules |
Btu |
0.0009479 |
| Velocity |
| feet per second |
meters per second |
0.3048 |
| feet per second |
miles per hour |
0.6818 |
| feet per second |
knots |
0.5921 |
| meters per second |
feet per second |
3.281 |
| meters per second |
miles per hour |
2.237 |
| miles per hour |
meters per second |
0.4470 |
| miles per hour |
feet per second |
1.467 |
| knots |
meters per second |
0.5148 |
| knots |
miles per hour |
1.151 |
| knots |
feet per second |
1.689 |
| Density |
| pounds per cubic foot |
grams per cubic centimeter |
0.01602 |
| grams per cubic centimeter |
pounds per cubic foot |
62.42 |
| grams per cubic centimeter |
kilograms per cubic meter |
1000* |
| kilograms per cubic meter |
grams per cubic centimeter |
0.001* |
| Pressure |
| pounds per square inch absolute (psia) |
kilonewtons per square meter (kN/m2) |
6.895 |
| psia |
atmospheres |
0.0680 |
| psia |
inches of water |
27.67 |
| psia |
millimeters of mercury (torr) |
51.72 |
| pounds per square inch gauge (psig) |
psia |
add 14.70 |
| millimeters of mercury (torr) |
psia |
0.01934 |
| millimeters of mercury (torr) |
kN/m2 |
0.1333 |
| inches of water |
psia |
0.03614 |
| kilograms per square centimeter |
millimeters of mercury (torr) |
735.6 |
| inches of water |
kN/m2 |
0.2491 |
| kilograms per square centimeter |
atmospheres |
0.9678 |
| atmospheres |
kN/m2 |
101.3 |
| kilograms per square centimeter |
psia |
14.22 |
| atmospheres |
psia |
14.70 |
| bars |
kN/m2 |
100* |
| kilonewtons per square meter |
psia |
0.1450 |
| bars |
atmospheres |
0.9869 |
| kilonewtons per square meter |
atmospheres |
0.009869 |
| bars |
kilograms per square centimeter |
1.020 |
| Viscosity |
| centipoises |
pounds per foot per second |
0.0006720 |
| pounds per foot per second |
centipoises |
1488 |
| centipoises |
poises |
0.01* |
| centipoises |
newton seconds per square meter |
0.001* |
| poises |
grams per centimeter per second |
1* |
| grams per centimeter per second |
poises |
1* |
| newton seconds per square meter |
centipoises |
1000* |
| Thermal Conductivity |
| Btu per hour per foot per oF |
watts per meter-Kelvin |
1.731 |
| Btu per hour per foot per oF |
kilocalories per hour per meter per oC |
1.488 |
| watts per meter-Kelvin |
Btu per hour per foot per oF |
0.5778 |
| kilocalories per hour per meter per oC |
watts per meter-Kelvin |
1.163 |
| kilocalories per hour per meter per oC |
Btu per hour per foot per oF |
0.6720 |
| Heat Capacity |
| Btu per pound per oF |
calories per gram per oC |
1* |
| Btu per pound per oF |
joules per kilogram-Kelvin |
4187 |
| joules per kilogram-Kelvin |
Btu per pound per oF |
0.0002388 |
| calories per gram per oC |
Btu per pound per oF |
1* |
| Concentration (in water solution) |
| parts per million (ppm) |
milligrams per liter |
1* |
| milligrams per liter |
ppm |
1* |
| milligrams per cubic meter |
grams per cubic centimeter |
1 X 10-9 |
| grams per cubic centimeter |
milligrams per cubic meter |
1 X 109 |
| grams per cubic centimeter |
pounds per cubic foot |
62.42 |
| pounds per cubic foot |
grams per cubic centimeter |
0.01602 |
| Temperature |
| degrees Kelvin (oK) |
degrees Rankine (oR) |
1.8* |
| degrees Rankine (oR) |
degrees Kelvin (oK) |
0.5556 |
| degrees centigrade (oC) |
degrees Fahrenheit (oF) |
first multiply by 1.8, then add 32 |
| degrees Fahrenheit (oF) |
degrees centigrade (oC) |
first subtract 32, then multiply by 0.5556 |
| degrees centigrade (oC) |
degrees Kelvin (oK) |
add 273.2 |
| degrees Fahrenheit (oF) |
degrees Rankine (oR) |
add 459.7 |
| Flow |
| cubic feet per second |
U.S. gallons per minute |
448.9 |
| U.S. gallons per minute |
cubic feet per second |
0.002228 |