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Conversion Formulas

Quick reference guide for unit conversions in plastics processing

Approximate conversion factors to be used where precision calculations are not necessary. Neither PSC nor any of its affiliates makes any warranty, expressed or implied, or accepts any liability in connection with this information or its use. This information is furnished upon the condition that the person receiving it shall make his own tests to determine the suitability thereof for a particular purpose.

AREA

FromToMultiply By
square centimeterssquare inches0.155
square feetsquare meter0.0929
square inchessquare centimeters6.4516
square inchessquare millimeters645.16
square metersquare feet10.7639
square millimeterssquare inches0.0016

DENSITY

FromToMultiply By
grams/cubic centimeterpounds/cubic inch0.0361
pounds/cubic footgrams/cubic centimeter0.016
pounds/cubic inchgrams/cubic centimeter27.68

ENERGY

FromToMultiply By
foot-poundsjoules1.3558
foot-pounds/inchjoules/centimeter0.5338
foot-pounds/inchjoules/meter53.379
foot-pounds/inchkilogram-centimeter/cm5.3348
foot-pounds/inchkilogram-meter/meter5.3348
foot-pounds/square inchkilo joules/square meter2.103
inch-poundsjoules0.113
joulesfoot-pounds0.7376
joulesinch-pounds8.8507
joules/centimeterfoot-pounds/inch1.8734
joules/meterfoot-pounds/inch0.0187
kilograms-centimeter/cmfoot-pounds/inch0.1875
kilogram-meter/meterfoot-pounds/inch0.1875
kilo joules/square meterfoot-pounds/square inch0.4755

FORCE

FromToMultiply By
kilogram-forcenewtons9.8067
newtonskilogram-force0.102
newtonsounce-force3.5969
newtonspound-force0.2248
ounce-forcenewtons0.278
pound-forcenewtons4.4482

FUEL

FromToMultiply By
kilometers/litermiles/gallon2.3521
miles/gallonkilometers/liter0.4251

LENGTH

FromToMultiply By
centimetersinches0.3937
feetcentimeters30.48
feetmeters0.3048
inchescentimeters2.54
inchesmeters0.0254
inchesmillimeters25.4
kilometersmiles0.6214
metersfeet3.2808
metersinches39.3701
milmillimeters0.0254
mileskilometers1.6093
millimetersinches0.0394
millimetersmil39.3701

PRESSURE

FromToMultiply By
barpounds/square inch (psi)14.5038
inches of Mercury (Hg)kilopascals (kPa)3.3864
kilograms/square cmpounds/square inch (psi)14.223
kilopascals (kPa)inches of Mercury (Hg)0.2953
kilopascals (kPa)pounds/square foot20.8854
kilopascals (kPa)pounds/square inch (psi)0.145
megapascals (Mpa)pounds/square inch (psi)145.0376
pounds/square footkilopascals (kPa)0.0479
pounds/square inch (psi)bar0.069
pounds/square inch (psi)kilograms/square cm0.0703
pounds/square inch (psi)kilopascals (kPa)6.8948
pounds/square inch (psi)megapascals (Mpa)0.0069

TEMPERATURE

FromToMultiply By
degree °Cdegree °F9/5(C) + 32 = °F
degree °Fdegree °C(F-32)(5/9) = °C

THERMAL CONDUCTIVITY

FromToMultiply By
BTU-in/hr sq. ft °FW/(m-K)0.1442
W/(m-K)BTU-in/hr sq. ft6.933

THERMAL EXPANSION

FromToMultiply By
inches/inch/°Fcentimeter/cm °C1.8
inches/inch/°Fmeters/meter °C1.8
centimeter/cm/°Cinches/inch °F0.5556
meters/meter/°Cinches/inch °F0.5556

VELOCITY

FromToMultiply By
kilometers/hourmiles/hour0.6214
miles/hourkilometers/hour1.6093

VISCOSITY

FromToMultiply By
Pascal-secondpoise10
poisePascal-second0.1

VOLUME

FromToMultiply By
cubic centimeterscubic inches0.061
cubic decimetercubic foot0.0353
cubic footcubic decimeter28.3169
cubic inchescubic centimeters16.3871
cubic inchesliters0.0164
gallonsliters3.7854
literscubic inches61.0237
litersgallons0.2642
literspints2.1134
litersquarts1.0567
millilitersounces0.0338
ouncesmilliliters29.5735
pintsliters0.4732
quartsliters0.9464

WEIGHT

FromToMultiply By
gramsounces0.0353
kilogramspounds2.2046
ouncesgrams28.3495
poundskilograms0.4536
ton (metric)ton (US)1.1023
ton (US)ton (metric)0.9072

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