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Conversion Formulas

To Convert To… Multiply… By…
Atmospheres (atm) Bar --
Inches Mercury (in Hg)
Pounds/square inch (psi)
Torr --
0.9869
0.03342
0.06805
0.001316
Bar Atmospheres (atm)
Pounds/square inch (psi)
1.0133
0.06895
British Thermal Units (Btu) Joules (J)
Kilowatt-hours (KWh)
Watt-hours (Wh)
0.000948
3412
3.412
British Thermal Units/hour (Btu/h) Kilocalories/hour (kcal/h)
Watts (W)
3.969
3.412
British Thermal Units/inches
   hour-square foot---°F
British Thermal Units/pound
British Thermal
   Units/pound---°F
(Btu---in)
(h-ft2---°F)
(Btu/lb)
(Btu/lb---°F)
Watts/meter---°C (W/m---°C)
Kilojoules/kilogram (kJ/kg)
Kilojoules/kilogram---°C (kJ/kg---°C)
6.933
 
0.4299
0.2388
Calories (cal) Joules (J) 0.2388
Centimeters (cm) Feet (ft)
Inches (in)
30.48
2.54
Centimeters/second (cm/s) Feet/minute (fpm) 0.508
Cubic centimeters (cm3 or cc) Cubic feet (ft3)
Cubic inches (in3)
Milli Liters (ml)
28,320
16.39
1.0
Cubic feet (ft3) Cubic meters (m3)
Gallons, U.S. (gal)
Liters (l)
35.32
0.1337
.03532
Cubic feet/minute (cfm) Cubic meters/hour (m3/h)
Cubic meters/second (m3/s)
Liters/second (l/s)
0.5885
2119
2.119
Cubic inches (in3) Cubic centimeters (cm3 or cc) 0.061
Cubic meters (m3) Gallons, U.S. (gal)
Liters (l)
Cubic feet (ft3)
0.003785
0.001
0.02832
Cubic meters/hour (m3/h) Cubic feet/minute (cfm)
Gallons/minute (gpm)
1.699
0.2271
Cubic meters/second (m3/s) Cubic feet/minute (cfm) 0.000472
Feet (ft) Centimeters (cm)
Meters (m)
0.03281
3.281
Feet/minute (fpm) Centimeters/second (cm/s)
Meters/second (m/s)
1.969
196.9
Gallons, Imperial -- Gallons, U.S. (gal) 0.8327
Gallons, U.S. (gal) Cubic feet (ft3)
Cubic meters (m3)
Gallons, Imperial --
Liters (l)
7.481
264.2
1.201
0.2642
Gallons/minute (gpm) Cubic meters/hour
Liters/second (m3/h)
(l/s)
4.403
15.85
Grams (g) Ounces (oz)
Pounds (lb)
28.35
453.6
Grams/cubic centimeter (g/cm3) Kilograms/cubic meter (kg/m3)
Pounds/cubic foot (lb/ft3)
Pounds/cubic inch (lb/in3)
0.001
0.01602
27.68
Inches (in) Centimeters (cm)
Millimeters (mm)
0.3937
0.03937
Inches Mercury (in Hg) Atmospheres (atm)
Torr -
29.92
25.4
Joules (J) British Thermal Units (Btu)
Calories (cal)
Watt-hours (Wh)
1055
4.187
3600
Joules/second (J/s) British Thermal Units/hour (Btu/h)
Watts (W)
0.2931
1
Kilocalories/hour (kcal/h) Btu/hour (Btu/h) 0.252
Kilograms
Kilograms/cubic meter
Kilograms/cubic meter
Kilograms/square
   centimeter
(kg)
(kg/m3)
(kg/m3)
(kg/cm2)
Pounds (lb)
Grams/cubic centimeter (g/cm3)
Pounds/cubic foot (lb/ft3)
Pounds/square inch (psi)
0.4536
1000
16.02
0.07031
Kilojoules
Kilojoules/kilogram
Kilojoules/kilogram---ºC
(kJ)
(kJ/kg)
(kJ/kg---ºC)
Watt-hours (Wh)
British Thermal Units/pound (Btu/lb)
British Thermal
   Units/pound---ºF (Btu/lb---ºF)
3.6
2.326
4.187
Kilometers/hour (km/h) Miles/hour (mph) 1.609
Kilopascals (kPa) Pounds/square inch (psi) 6.895
Kilowatts (KW) British Thermal Units/hour (Btu/h)
Watts (W)
0.0002931
0.001
Kilowatt-hours (KWh) British Thermal Units Btu)
Watt-hours (Wh)
0.0002931
0.001
Liters (l) Cubic Feet (ft3)
Cubic Meters (m3)
Gallons, U.S. (gal)
28.32
1000
3.785
Liters/second (l/s) Cubic feet/minute (cfm)
Gallons/minute (gpm)
0.4719
0.06309
Meters
Meters/second
(m)
(m/s)
Feet (ft)
Feet/minute (fpm)
0.3048
0.00508
Miles/hour (mph) Kilometers/hour (km/h) 0.6215
Millimeters (mm) Inches (in) 25.4
Newtons/square meter (N/m2) Pounds/square inch (psi) 6,895
Ounces (oz) Grams (g) 0.035274
Pounds (lb) Grams (g)
Kilograms (kg)
0.002205
2.205
Pounds/cubic foot (lb/ft3) Grams/cubic centimeter (g/cm3)
Kilograms/cubic meter (kg/m3)
62.43
0.06243
Pounds/cubic inch (lb/in3) Grams/cubic centimeter (g/cm3) 0.03613
Pounds/square inch (psi) Bar -
Kilograms/square centimeter (kg/cm2)
Kilopascals (kPa)
Newtons/square meter (N/m2)
14.504
14.22
0.145
0.000145
Square centimeters (cm2) Square feet (ft2)
Square inches (in2)
929
6.452
Square feet (ft2) Square centimeters (cm2)
Square meters (m2)
0.001076
10.76
Square inches (in2) Square centimeters (cm2) 0.155
Square meters (m2) Square feet (ft2) 0.0929
Torr Inches Mercury (in. Hg)
Pounds/square inch (psi)
0.03937
51.71
Watts (W) British Thermal Units/hour (Btu/h)
Joules/second (J/s)
0.2931
1
Watt-hours (Wh) British Thermal Units (Btu)
Joules (J)
Kilojoules (kJ)
0.2931
0.0002778
0.2778
Watts/meter---ºC
 
Watts/square centimeter
Watts/square inch
(W/m---ºC)
 
(W/cm2)
(W/in2)

Watts/square inch (W/in2)
Watts/square centimeter (W/cm2)
0.1442
 
0.155
6.452
 
Temperature Scale Convert to by…
Fahrenheit °F = 1.8°C + 32°
Celsius °C = 5/9 (°F-32°)
Rankine °R = 1.8K + 0.6°
°R = °F + 460°
Kelvin K = 5/9 (°R-0.6°)
K = °C + 273°
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