Megajoules per Kilogram to BTU per Pound (MJ/kg to BTU/lb)
1 megajoule per kilogram (MJ/kg) = 429.9226139 BTU per pound (BTU/lb). 1 BTU/lb = 0.002326 MJ/kg. Example: 45 MJ/kg = 45 × 429.9226139 = 19346.51763 BTU/lb.
Also searched as megajoules per kilogram to BTU/lb, megajoules per kilogram in BTU/lb, megajoules per kilogram into BTU per pound, MJ/kg to BTU/lb, MJ/kg in BTU per pound, MJ/kg into BTU per pound, megajoule per kilogram to BTU per pound, MJ/kg to BTU per pound converter and how many BTU per pound in a megajoule per kilogram.
1 MJ/kg = 429.9226139 BTU/lb
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk megajoule per kilogram to BTU per pound converter to paste a column from Excel.
How to Convert Megajoule per Kilogram to BTU per Pound
- 1 MJ/kg = 429.9226139 BTU/lb
- 1 BTU/lb = 0.002326 MJ/kg
- Example: convert 45 MJ/kg to BTU/lb: 45 MJ/kg = 45 × 429.9226139 BTU/lb = 19346.51763 BTU/lb
Formula
BTU/lb = MJ/kg × 429.9226139295
Derivation from SI units:
- 1 MJ/kg = 10⁶ J/kg.
- 1 BTU_IT/lb = 1055.05585262 J ÷ 0.45359237 kg = 2326 J/kg exactly.
- 1 MJ/kg = 1000000 J/kg ÷ 2326 J/kg per BTU/lb = 429.9226139295 BTU/lb
Both units are defined exactly, so the factor is exact. Megajoule per Kilogram definition: megajoule per kilogram; BTU per Pound definition: BTU per pound.
Worked examples
- Diesel at 45 MJ/kg is 19346.51763 BTU/lb.
45 MJ/kg × 429.9226139 = 19346.51763 BTU/lb - A coal of 25 MJ/kg is 10748.06535 BTU/lb.
25 MJ/kg × 429.9226139 = 10748.06535 BTU/lb
Megajoule per Kilogram to BTU per Pound conversion table
| Megajoules per Kilogram (MJ/kg) | BTU per Pound (BTU/lb) |
|---|---|
| 10 MJ/kg | 4299.226139 BTU/lb |
| 15 MJ/kg | 6448.839209 BTU/lb |
| 17 MJ/kg | 7308.684437 BTU/lb |
| 25 MJ/kg | 10748.06535 BTU/lb |
| 30 MJ/kg | 12897.67842 BTU/lb |
| 42 MJ/kg | 18056.74979 BTU/lb |
| 44 MJ/kg | 18916.59501 BTU/lb |
| 46 MJ/kg | 19776.44024 BTU/lb |
| 50 MJ/kg | 21496.1307 BTU/lb |
| 120 MJ/kg | 51590.71367 BTU/lb |
Where it's used
Fuel heating values in MJ/kg are converted to BTU/lb for US data sheets. Multiply by 429.923.
Megajoule per Kilogram to other specific energy units
| Conversion | 1 MJ/kg equals |
|---|---|
| megajoule per kilogram to BTU per pound | 429.9226139 BTU/lb |
| megajoule per kilogram to kilojoule per kilogram | 1000 kJ/kg |
| megajoule per kilogram to kilocalorie per kilogram | 238.8458966 kcal/kg |
| megajoule per kilogram to joule per kilogram | 1000000 J/kg |
| megajoule per kilogram to calorie per gram | 238.8458966 cal/g |
| megajoule per kilogram to kilowatt-hour per kilogram | 0.2777777778 kWh/kg |
| megajoule per kilogram to joule per gram | 1000 J/g |
Frequently asked questions
How many BTU/lb is 1 MJ/kg?
1 MJ/kg = 429.9226139 BTU/lb.
How many BTU per pound are in 1 megajoule per kilogram?
1 MJ/kg = 429.9226139 BTU/lb.
How do I convert megajoules per kilogram to BTU per pound?
Multiply the value in MJ/kg by 429.9226139. For example, 45 MJ/kg × 429.9226139 = 19346.51763 BTU/lb.
Is the MJ/kg to BTU/lb conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4 (derived units with special names).
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "British thermal unit_IT per pound".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Megajoules per Kilogram to BTU per Pound (MJ/kg to BTU/lb). Retrieved October 29, 2026, from https://scientificconverters.com/specific-energy/megajoules-per-kilogram-to-btu-per-pound/
IEEE
Scientific Converters, "Megajoules per Kilogram to BTU per Pound (MJ/kg to BTU/lb)," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/specific-energy/megajoules-per-kilogram-to-btu-per-pound/