Heat Converters
Fuel Efficiency (Mass) Converter
Convert specific energy (heating value) of fuels between J/kg, kcal/kg and BTU/lb. Gasoline's lower heating value is about 44 MJ/kg.
FUEL EFFICIENCY (MASS) CONVERTER — INSTANT RESULT
All supported units — fuel efficiency (mass)
| Unit | Symbol | To joule/kilogram (J/kg) | From joule/kilogram (J/kg) |
|---|---|---|---|
| Joule/kilogram | J/kg | 1 J/kg = 1 J/kg | 1 J/kg = 1 J/kg |
| Kilojoule/kilogram | kJ/kg | 1 kJ/kg = 1,000 J/kg | 1 J/kg = 0.001 kJ/kg |
| Megajoule/kilogram | MJ/kg | 1 MJ/kg = 1,000,000 J/kg | 1 J/kg = 1e-06 MJ/kg |
| Calorie/gram | cal/g | 1 cal/g = 4,184 J/kg | 1 J/kg = 0.00023900574 cal/g |
| Kilocalorie/kilogram | kcal/kg | 1 kcal/kg = 4,184 J/kg | 1 J/kg = 0.00023900574 kcal/kg |
| BTU/pound | BTU/lb | 1 BTU/lb = 2,326.0003244 J/kg | 1 J/kg = 0.00042992255 BTU/lb |
| Kilowatt-hour/kilogram | kWh/kg | 1 kWh/kg = 3,600,000 J/kg | 1 J/kg = 2.7777778e-07 kWh/kg |
| Horsepower-hour/pound | hp·h/lb | 1 hp·h/lb = 5,918,352.5016 J/kg | 1 J/kg = 1.6896594e-07 hp·h/lb |
Popular fuel efficiency (mass) conversions
Frequently asked questions
What units does this fuel efficiency (mass) converter support?
It supports 8 units: Joule/kilogram (J/kg), Kilojoule/kilogram (kJ/kg), Megajoule/kilogram (MJ/kg), Calorie/gram (cal/g), Kilocalorie/kilogram (kcal/kg), BTU/pound (BTU/lb), Kilowatt-hour/kilogram (kWh/kg), Horsepower-hour/pound (hp·h/lb).
What is the base unit of fuel efficiency (mass)?
The SI reference unit is the joule/kilogram (J/kg). Every conversion is computed by converting the input to the base unit, then from the base unit to the target unit, so chained precision is preserved.
Is this converter accurate?
Yes. Conversion factors use exact legal definitions where they exist (for example 1 in = 25.4 mm exactly) and CODATA/ISO constants otherwise. Results are shown to up to 10 significant figures.