CONVERSION CHART
IMPERIAL TO METRIC
METRIC TO IMPERIAL
HEAT
1 Therm = 100,000 Btu/hr
1 Btu/hr = 0.2931 W
1 Btu
= 1055 J
1 Btu/hr = 0.252 kcal/hr
1 kW
= 3412 Btu/hr
1 J
= 0.0009478 Btu
1 kcal/hr = 3.968 Btu/hr
FUEL CONSUMPTION
1 dm3 = 1 LITRE
1,000 dm3 = 1m3
1 ft3
= 28.317 dm3 (litre)
1 UK Gall = 4.546 litre
1 UK Gall = 1.2 U.S. Gallon
1 m3
= 35.3147 ft3
1 litre
= 0.2199 Imp.
Gallon
PRESSURE
1 PSI = 2.307 FT
1 kPa = 1000 Pa
1 bar = 1000 mbar = 100 kPa
1 lb/in2
= 6895 Pa
1 lb/in2
= 68.95 mbar
1 in.w.g.
= 249.1 Pa
1 in.w.g.
= 2.491 mbar
1 in.w.g
= 25.4 mm.w.g.
1 bar
= 33.45 ft.w.g.
1 kPa
= 0.3345 ft.w.g.
1 bar
= 14.5 lb/in2
1 Pa
= 0.3858 in.w.g.
1 mm.w.g. = 0.0394 in.w.g.
1 mm.w.g. = 9.8 Pa
LENGTH
1m = 1000mm
1 inch
= 25.4mm
1 ft
= 0.3048 m
1 yard
= 0.9144 m
1 mile
= 1.609 km
1 mm
= 0.03937 in
1 m
= 3.281 ft
1 m
= 1.094 yard
1 km
= 0.6214 mile
VOLUME
1 ft3
= 0.02832 m3
1 ft3
= 28.32 litre
1 m3
= 35.3147 ft3
1 litre
= 0.03531 ft3
AREA
1 in2
= 645.2 mm2
1 in2
= 6.452 cm2
1 ft2
= 929 cm2
1 ft2
= 0.0929 m2
1 mm2
= 0.00155 in2
1 cm2
= 0.155 in2
1 m2
= 1550 in2
1 m2
= 10.76 ft2
FLOW RATE
1 kg/sec = 1 lit/sec @
0°C reference temperature
1 gall/min = 0.07577 lit/sec
1 ft3/min
= 0.4719 lit/sec
1 ft3/min
= 0.00047 m3/sec
1 lit/sec
= 13.2 gall/min
1 lit/sec
= 2.119 ft3/min
1 m3/sec = 2119 ft3/min
TEMPERATURE
°F to °C = ("X"°F - 32) x 0.5556 °C to °F = ("X" °C x 1.8) +
32
TEMPERATURE DIFFERENCE
1°C = 1°K
"X"°F x 0.5556 = °C
"X" °C x 1.8 = °F
WEIGHT
1 lb
= 0.4536 kg
1 cwt
= 50.8 kg
1 ton
= 1016 kg
1 kg
= 2.205 lb
1 tonne
= 0.9842 ton
1 tonne
= 2204.6 lb