Weight and Measures - Conversion Factors
QUANTITY U.S.
CUSTOMARY
METRIC FROM U.S.
CUSTOMARY
TO
METRIC
MULTIPLY BY
FROM
METRIC
TO U.S.
CUSTOMARY
MULTIPLY BY
Unit
Name
Abbr. Unit
Name
Abbr.
Area sq. inch in
2
sq. millimeters m
2
645.16 0.001550
Force pounds force lbf Newton N 4.4482 0.224809
Length inch in millimeters mm 25.40 0.039370
Pressure pounds force
per sq. in
psi kilopascal kPa 6.8948 0.145037
inches of
mercury
in Hg kilopascal kPa 3.3769 0.29613
inches of
water
in H2O kilopascal kPa 0.2488 4.019299
inches of
mercury
in Hg millimeters
of mercury
mm Hg 25.40 0.039370
inches of
water
in H2O millimeters
of water
mm H2O 25.40 0.039370
Torque pound force
per foot
lb ft Newton-meter N•m 1.35582 0.737562
pound force
per inch
lb in Newton-meter N•m 0.113 8.850756
Volume:
liquid
displacement
gallon (U.S.) gal. liter l 3.7853 0.264179
gallon (Imp*) gal. liter l 4.546 0.219976
cubic inch in
3
liter l 0.01639 61.02545
Weight
(mass)
pounds (avoir.) lb kilograms kg 0.4536 2.204623
Section V - Engine Component Specifications Weight and Measures - Conversion Factors
N14 Page V-41