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Fuel Efficiency - Mass Converter

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Fuel Efficiency - Mass Converter

Convert mass-based fuel efficiency and energy-density units such as J/kg, kJ/kg, cal/g, Btu/lb, and g/kWh.

About this converter

Mass-based fuel efficiency compares energy output with fuel mass. It applies to fuels, combustion, engine efficiency, heating values, and thermal engineering references.

The base unit for this converter is joule-per-kilogram, which lets us map each unit into one consistent formula layer before converting to the target unit.

Popular pages

Joule per kilogram to Kilojoule per kilogram Kilojoule per kilogram to Calorie (IT) per gram Calorie (IT) per gram to Btu (IT) per pound Btu (IT) per pound to Kilogram per joule Kilogram per joule to Gram per kilowatt-hour

Quick examples

42000 J/kg to kJ/kg42 kJ/kg

42000 J/kg to cal/g10.0315276583548 cal/g

42000 kJ/kg to J/kg42,000,000 J/kg

42000 kJ/kg to cal/g10,031.5276583548 cal/g

42000 cal/g to J/kg175,845,600 J/kg

42000 cal/g to kJ/kg175,845.6 kJ/kg

42000 Btu/lb to J/kg97,692,000 J/kg

42000 Btu/lb to kJ/kg97,692 kJ/kg

Available units

Joule per kilogram

J/kg

The base unit for mass-based fuel energy content.

J/kg to kJ/kg J/kg to cal/g J/kg to Btu/lb

Kilojoule per kilogram

kJ/kg

A practical metric mass-based energy unit.

kJ/kg to J/kg kJ/kg to cal/g kJ/kg to Btu/lb

Calorie (IT) per gram

cal/g

A calorie-based energy-per-mass unit.

cal/g to J/kg cal/g to kJ/kg cal/g to Btu/lb

Btu (IT) per pound

Btu/lb

A customary heat energy per mass unit.

Btu/lb to J/kg Btu/lb to kJ/kg Btu/lb to cal/g

Kilogram per joule

kg/J

An inverse-style mass fuel efficiency unit from the reference list.

kg/J to J/kg kg/J to kJ/kg kg/J to cal/g

Gram per kilowatt-hour

g/kWh

A common engine and fuel-consumption efficiency unit.

g/kWh to J/kg g/kWh to kJ/kg g/kWh to cal/g

Calorie (th) per gram

cal th/g

Calorie (th) per gram is a mass-based fuel efficiency or energy-density unit.

cal th/g to J/kg cal th/g to kJ/kg cal th/g to cal/g

Btu (th) per pound

Btu th/lb

Btu (th) per pound is a mass-based fuel efficiency or energy-density unit.

Btu th/lb to J/kg Btu th/lb to kJ/kg Btu th/lb to cal/g

Kilogram per kilojoule

kg/kJ

Kilogram per kilojoule is a mass-based fuel efficiency or energy-density unit.

kg/kJ to J/kg kg/kJ to kJ/kg kg/kJ to cal/g

Gram per calorie (IT)

g/cal IT

Gram per calorie (IT) is a mass-based fuel efficiency or energy-density unit.

g/cal IT to J/kg g/cal IT to kJ/kg g/cal IT to cal/g

Gram per calorie (th)

g/cal th

Gram per calorie (th) is a mass-based fuel efficiency or energy-density unit.

g/cal th to J/kg g/cal th to kJ/kg g/cal th to cal/g

Pound per Btu (IT)

lb/Btu IT

Pound per Btu (IT) is a mass-based fuel efficiency or energy-density unit.

lb/Btu IT to J/kg lb/Btu IT to kJ/kg lb/Btu IT to cal/g

Pound per Btu (th)

lb/Btu th

Pound per Btu (th) is a mass-based fuel efficiency or energy-density unit.

lb/Btu th to J/kg lb/Btu th to kJ/kg lb/Btu th to cal/g

Pound per horsepower hour

lb/hp h

Pound per horsepower hour is a mass-based fuel efficiency or energy-density unit.

lb/hp h to J/kg lb/hp h to kJ/kg lb/hp h to cal/g

Gram per horsepower (metric) hour

g/metric hp h

Gram per horsepower (metric) hour is a mass-based fuel efficiency or energy-density unit.

g/metric hp h to J/kg g/metric hp h to kJ/kg g/metric hp h to cal/g

Main pair pages

Joule per kilogram

Joule per kilogram to Kilojoule per kilogram Joule per kilogram to Calorie (IT) per gram Joule per kilogram to Btu (IT) per pound Joule per kilogram to Kilogram per joule Joule per kilogram to Gram per kilowatt-hour

Kilojoule per kilogram

Kilojoule per kilogram to Joule per kilogram Kilojoule per kilogram to Calorie (IT) per gram Kilojoule per kilogram to Btu (IT) per pound Kilojoule per kilogram to Kilogram per joule Kilojoule per kilogram to Gram per kilowatt-hour

Calorie (IT) per gram

Calorie (IT) per gram to Joule per kilogram Calorie (IT) per gram to Kilojoule per kilogram Calorie (IT) per gram to Btu (IT) per pound Calorie (IT) per gram to Kilogram per joule Calorie (IT) per gram to Gram per kilowatt-hour

Btu (IT) per pound

Btu (IT) per pound to Joule per kilogram Btu (IT) per pound to Kilojoule per kilogram Btu (IT) per pound to Calorie (IT) per gram Btu (IT) per pound to Kilogram per joule Btu (IT) per pound to Gram per kilowatt-hour

Kilogram per joule

Kilogram per joule to Joule per kilogram Kilogram per joule to Kilojoule per kilogram Kilogram per joule to Calorie (IT) per gram Kilogram per joule to Btu (IT) per pound Kilogram per joule to Gram per kilowatt-hour

Gram per kilowatt-hour

Gram per kilowatt-hour to Joule per kilogram Gram per kilowatt-hour to Kilojoule per kilogram Gram per kilowatt-hour to Calorie (IT) per gram Gram per kilowatt-hour to Btu (IT) per pound Gram per kilowatt-hour to Kilogram per joule

More routes in this section

Joule per kilogram to Kilojoule per kilogram Joule per kilogram to Calorie (IT) per gram Joule per kilogram to Btu (IT) per pound Joule per kilogram to Kilogram per joule Kilojoule per kilogram to Joule per kilogram Kilojoule per kilogram to Calorie (IT) per gram Kilojoule per kilogram to Btu (IT) per pound Kilojoule per kilogram to Kilogram per joule Calorie (IT) per gram to Joule per kilogram Calorie (IT) per gram to Kilojoule per kilogram Calorie (IT) per gram to Btu (IT) per pound Calorie (IT) per gram to Kilogram per joule