Specific Enthalpy Converter (kJ/kg, BTU/lb, kcal/kg)
Specific Enthalpy Converter (kJ/kg, BTU/lb, kcal/kg): convert between 8 specific energy units, for example 1 BTU/lb = 2.326 kJ/kg.
| Unit | Value |
|---|---|
| BTU per pound to joule per kilogram | 2326 J/kg |
| BTU per pound to kilojoule per kilogram | 2.326 kJ/kg |
| BTU per pound to joule per gram | 2.326 J/g |
| BTU per pound to megajoule per kilogram | 0.002326 MJ/kg |
| BTU per pound (BTU/lb) | 1 BTU/lb |
| BTU per pound to kilocalorie per kilogram | 0.5555555556 kcal/kg |
| BTU per pound to calorie per gram | 0.5555555556 cal/g |
| BTU per pound to kilowatt-hour per kilogram | 0.0006461111111 kWh/kg |
Convert specific enthalpy, latent heat and calorific value between kJ/kg, J/kg, MJ/kg, J/g, BTU/lb, kcal/kg, cal/g and kWh/kg. 1 BTU/lb = 2.326 kJ/kg and 1 kcal/kg = 4.1868 kJ/kg exactly.
Calorific values
Indian coal is graded by gross calorific value in kcal/kg, from G1 (above 7000 kcal/kg) down to G17; fuels internationally are rated in MJ/kg. 6000 kcal/kg = 25.1 MJ/kg = 10,800 BTU/lb.
Latent heats of water
Fusion 334 kJ/kg (80 cal/g, 144 BTU/lb); vaporisation at 100 °C 2257 kJ/kg (539 cal/g, 970 BTU/lb).
Specific Energy unit definitions
- kilojoule per kilogram (kJ/kg)
- Kilojoules per kilogram are the unit of steam-table enthalpy and latent heat: the latent heat of vaporisation of water at 100 °C is 2257 kJ/kg and of fusion of ice 334 kJ/kg.
- megajoule per kilogram (MJ/kg)
- Megajoules per kilogram express the heating (calorific) value of fuels: diesel about 45 MJ/kg, coal 20–30 MJ/kg, biomass 15–19 MJ/kg and hydrogen 120 MJ/kg (lower heating values).
- BTU per pound (BTU/lb)
- BTU per pound is the US unit of specific enthalpy and heating value, exactly 2.326 kJ/kg: water’s latent heat of vaporisation is 970 BTU/lb and diesel about 19,000 BTU/lb.
- kilocalorie per kilogram (kcal/kg)
- Kilocalories per kilogram are how Indian coal grades (GCV bands) and older boiler texts state heating values: G-grade coal is 4300–4600 kcal/kg, and 1 kcal/kg = 4.1868 kJ/kg. Reference: International Table calorie (4.1868 J).
- joule per kilogram (J/kg)
- The joule per kilogram is the SI unit of specific energy: enthalpy, latent heat and heating value per unit mass. It is dimensionally m²/s², the same as a velocity squared.
- calorie per gram (cal/g)
- Calories per gram give latent heats (water: 80 cal/g to melt, 540 cal/g to boil) and fuel values in CGS units. Reference: International Table calorie (4.1868 J).
Show 2 more units
- kilowatt-hour per kilogram (kWh/kg)
- Kilowatt-hours per kilogram describe battery and fuel energy density and the energy needed per kilogram of product: Li-ion cells hold about 0.25 kWh/kg and hydrogen 33.3 kWh/kg (LHV).
- joule per gram (J/g)
- Joules per gram are used in calorimetry and DSC results (enthalpy of melting, crystallinity); the number equals kJ/kg.
Popular specific energy conversions
- kilojoule per kilogram to BTU per pound
- kilojoule per kilogram to kilocalorie per kilogram
- megajoule per kilogram to BTU per pound
- BTU per pound to kilojoule per kilogram
- kilocalorie per kilogram to kilojoule per kilogram
- kilocalorie per kilogram to megajoule per kilogram
Show all 56 specific energy conversions
From joules per kilogram
From kilojoules per kilogram
- kilojoule per kilogram to joule per kilogram
- kilojoule per kilogram to joule per gram
- kilojoule per kilogram to megajoule per kilogram
- kilojoule per kilogram to BTU per pound
- kilojoule per kilogram to kilocalorie per kilogram
- kilojoule per kilogram to calorie per gram
- kilojoule per kilogram to kilowatt-hour per kilogram
From joules per gram
From megajoules per kilogram
- megajoule per kilogram to joule per kilogram
- megajoule per kilogram to kilojoule per kilogram
- megajoule per kilogram to joule per gram
- megajoule per kilogram to BTU per pound
- megajoule per kilogram to kilocalorie per kilogram
- megajoule per kilogram to calorie per gram
- megajoule per kilogram to kilowatt-hour per kilogram
From BTU per pound
From kilocalories per kilogram
- kilocalorie per kilogram to joule per kilogram
- kilocalorie per kilogram to kilojoule per kilogram
- kilocalorie per kilogram to joule per gram
- kilocalorie per kilogram to megajoule per kilogram
- kilocalorie per kilogram to BTU per pound
- kilocalorie per kilogram to calorie per gram
- kilocalorie per kilogram to kilowatt-hour per kilogram
From calories per gram
From kilowatt-hours per kilogram
- kilowatt-hour per kilogram to joule per kilogram
- kilowatt-hour per kilogram to kilojoule per kilogram
- kilowatt-hour per kilogram to joule per gram
- kilowatt-hour per kilogram to megajoule per kilogram
- kilowatt-hour per kilogram to BTU per pound
- kilowatt-hour per kilogram to kilocalorie per kilogram
- kilowatt-hour per kilogram to calorie per gram
Related converters
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Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures.
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology.
Last reviewed: .