As designers, we occasionally get drawings and requests that have callouts for physical properties whose weights and measures are different than those with which we are accustomed. Here is a cheat sheet on the most common conversions. (A special thanks to those who have contributed to this information base. Additions and/or corrections welcome).
Weight Conversion
|
| PSI to MPa |
multiply by 0.00690 |
| MPa to PSI |
multiply by 145 |
| PSI to KPa |
multiply by 6.895 |
| KPa to PSI |
multiply by 0.145 |
| ounces to grams |
multiply by 28.35 |
| grams to ounces |
multiply by 0.0352 |
| pounds to kilograms |
multiply by 0.4536 |
| kilograms to pounds |
multiply by 2.2045 |
| imperial tons to kilograms |
multiply by 1016 |
| kilograms to imperial tons |
multiply by 0.00098 |
|
Fluid Volume Conversion
|
| U.S. fluid oz. to milliliters |
multiply by 29.574 |
| milliliters to U.S. fluid oz. |
multiply by 0.0338 |
| Imperial fluid oz. to milliliters |
multiply by 28.41 |
| milliliters to imperial fluid oz. |
multiply by 0.0351 |
|
Impact Strength Conversion
|
| Ft-lb/in to J/m(J=Joules) |
Multiply Ft-lb/in x 53 |
|
Dielectric Strength Conversion
|
| V/mil to KV/mm |
Divide V/mil by 25 |
|
Coefficient of Thermal Expansion
|
| in/in/°F to mm/°C |
Multiply in/in/°F x 1.8 |
|
Temperatures
|
|
°F to °C
|
°F-32/1.8
|
|
°C to °F
|
°C x 1.8 + 32
|
|
SurfaceFinishes
|
U.S. Micro Inch
|
U.S. Micro Meter
|
Europa
|
Europa Ra (my
|
| 1 |
0.025 |
N1 |
0.025 |
| 2 |
0.05 |
N2 |
0.05 |
| 4 |
0.10 |
N3 |
0.10 |
| 8 |
0.20 |
N4 |
0.20 |
| 16 |
0.40 |
N5 |
0.40 |
| 32 |
0.80 |
N6 |
0.80 |
| 63 |
1.60 |
N7 |
1.60 |
| 125 |
3.20 |
N8 |
3.20 |
| 250 |
6.30 |
N9 |
6.30 |
| 500 |
12.50 |
N10 |
12.50 |
| 1000 |
25.00 |
N11 |
25.00 |
| 2000 |
50.00 |
N12 |
50.00 |
|
Metric to U.S. Equivalents Linear Measure
|
| 1 centimeter |
0.3937 inch |
| 1 meter |
39.37 inches |
| 1 meter |
1.0936 yards |
| 1 kilometer |
0.621 mile |
|
U.S. to Metric Equivalents Linear Measure
|
| 1 inch |
2.54 centimeters |
| 1 foot |
30.48 centimeters |
| 1 foot |
0.3048 meter |
| 1 yard |
0.9144meter |
| 1 rod |
5.029 meters |
| 1 mile |
1.609 kilometers |
|
Metric to U.S. Equivalents Square Measure
|
| 1 square centimeter |
0.155 square inch |
| 1 square meter |
1.196 square yards |
| 1 hectare |
2.47 acres |
| 1 square kilometer |
0.386 square miles |
|
U.S. to Metric Equivalents Square Measure
|
| 1 square inch |
6.452 square centimeters |
| 1 square foot |
0.0929 square meter |
| 1 square yard |
0.8361 square meter |
| 1 acre |
0.4047 hectare |
| 1 square mile |
2.59 kilometers |
|
Metric to U.S. Equivalents Weights
|
| 1 gram |
0.03527 ounce |
| 1 kilogram |
2.2046 pounds |
| 1 metric ton |
1.102 English tons |
|
U.S. to Metric Equivalents Weights
|
| 1 ounce |
28.35 grams |
| 1 pound |
0.4536 kilograms |
| 1 English ton |
0.907 metric ton |
|
Metric to U.S. Equivalents Volumes
|
| 1 cubic centimeter |
0.061 cubic inch |
| 1 cubic meter |
1.308 cubic yards |
| 1 liter |
1.0567 quarts/liquid |
| 1 liter |
0.264 U.S. gallon |
| 1 hectoliter |
2.8373 bushels |
|
U.S. to Metric Equivalents Volumes
|
| 1 cubic inch |
16.39 cubic centimeters |
| 1 cubic foot |
0.0283 cubic meter |
| 1 cubic yard |
0.7646 cubic meter |
| 1 quart/dry |
1.101 liters |
| 1 quart/liquid |
0.9463 liter |
| 1 gallon |
3.78541 liters |
| 1 peck |
8.810 liters |
|
U.S. to U.S. Equivalents Cubic Measure
|
| 1.728 cubic inches |
1 cubic foot |
| 27 cubic feet |
1 cubic yard |
| 128 cubic feet |
1 cord (wood) |
| 2,150.42 cubic inches |
1 standard bu. |
| 231 cubic inches |
1 U.S. standard gallon |
|
U.S. to U.S. Equivalents Dry Measure
|
| 2 pints |
1 quart |
| 8 quarts |
1 peck |
| 4 pecks |
1 bushel |
|
U.S. to U.S. Equivalents Liquid Measure
|
| 4 gills |
1 pint |
| 2 pints |
1 quart |
| 4 quarts |
1 gallon |
| 31.50 gallons |
1 barrel |
|
U.S. to Imperial Liquid Measure
|
| 1 U.S. gallon |
0.833 imperial gallon |
| 1 U.S. gallon |
3.785 liters |
|
Imperial to U.S. Liquid Measure
|
| 1 imperial gallon |
1.201 U.S. gallons |
| 1 imperial gallon |
4.546 liters |
|
U.S. to U.S. Length Measure
|
| 12 inches |
1 foot |
| 3 feet |
1 yard |
| 5.5 feet |
1 rod |
| 40 rods |
1 furlong |
| 8 furlongs |
1 statute mile |
| 3 land miles |
1 league |
|
U.S. to U.S. Mariners Measure
|
| 6 feet |
1 fathom |
| 120 fathoms |
1 cable length |
| 5,280 feet |
1 statute mile |
| 6,076.11 feet |
1 nautical mile |
|
U.S. to U.S. Square Measure
|
| 144 square inches |
1 square foot |
| 9 square feet |
1 square yard |
| 30.25 square yards |
1 square rod |
| 640 square acres |
1 square mile |
|
