In order to calculate US English measurement, divide by the number in the centre column.

In order to calculate metric measurement, multiply by the number in the centre column.

Length

in

25.4

mm

ft

0.3048

m

yd

0.9144

mi

1.609

km

Area

sq in

645.2

sq mm

6.45

sq cm

sq ft

0.0929

sq m

sq yd

0.8361

Volume

cu in

16,387.0

cu mm

16.387

cu cm

0.0164

L

qt

0.9464

gal

3.7854

cu yd

0.764

cu m

Mass

lb

0.4536

kg

ton

907.18

0.907

tonne (t)

Force

kg F

9.807

newtons (N)

oz F

0.2780

lb F

4.448

Acceleration

ft/s²

0.3048

m/s²

in/s²

0.0254

Torque

lb in

0.11298

N·m

lb ft

1.3558

Power

hp

0.745

kW

Pressure (Stress)

inches of H2O

0.2488

kPa

inches of Mercury (Hg)

3.377

lb/sq in

6.895

Energy (Work)

Btu

1055.0

J (J= one Ws)

lb ft

1.3558

kW hour

3,600,000.0

Light

Foot Candle

10.764

lm/m²

Velocity

mph

1.6093

km/h

Temperature

(°F - 32) 5/9

=

°C

°F

=

(9/5 °C + 32)

Fuel Performance

235.215/mpg

=

100 km/L