Industrial Refrigeration Handbook

Appendix

Conversions between SI and Inch-Pound Units.

Table A.1. Conversions of length, area, and volume.
To convert From To Multiply by

length

inch

metre

0.0254

length

foot

metre

0.3048

length

metre

inch

39.3701

length

metre

foot

3.28084

area

square inch

square metre

0.00064516

area

square foot

square metre

0.092903

area

square metre

square inch

1,550.00

area

square metre

square foot

10.7639

volume

cubic inch

cubic metre

0.0000163871

volume

cubic foot

cubic metre

0.028317

volume

gallon

cubic metre

0.0037854

volume

cubic metre

litre

1,000.0

volume

cubic metre

cubic inch

61,023.74

volume

cubic metre

cubic foot

35.315

volume

cubic metre

gallon

264.173

Table A.2. Conversions of mass, density, and specific volume.
To convert From To Multiply by

mass

lb

kg

0.453592

mass

kg

lb

2.20462

density

lb/ft 3

kg/m 3

16.0185

density

kg/m 3

lb/ft 3

0.062428

specific volume

ft 3/lb

m 3/kg

0.062428

specific volume

m 3/kg

ft 3/lb

16.0185

Table A.3. Conversions of temperature.
From To Operation

F

R

add 459.67

R

F

subtract 459.67

C

K

add 273.15

K

C

subtract 273.15

C

F

multiply by 9/5, then add 32

F

C

subtract 32, then multiply by 5/9

Table A.4. Converssions of velocity, acceleration, and force.
To convert From To Multiply by

velocity

fps

m/s

0.304800

velocity

fpm

m/s

0.005080

velocity

mph

m/s

0.447040

velocity

m/s

fps

3.28084

velocity

m/s

fpm

196.850

velocity

m/s

mph

2.23694

acceleration

ft/s 2

m/s 2

0.304800

acceleration

m/s 2

ft/s 2

3.28084

force

lb

newton, N

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