Poly-Tech Industrial, Inc. - Conversion Chart

Conversion Chart

Conversion Chart

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

Surface Finishes

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	0.9144 meter
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

Poly-Tech Industrial, Inc. * 11330 Vanstory Drive * Huntersville, North Carolina, 28078 * PHONE: 704.948.8055 * FAX: 704.948.8065 * EMAIL:
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