BTU per Pound to Kilojoules per Kilogram (BTU/lb to kJ/kg)
1 BTU per pound (BTU/lb) = 2.326 kilojoules per kilogram (kJ/kg). 1 kJ/kg = 0.4299226139 BTU/lb. Example: 1000 BTU/lb = 1000 × 2.326 = 2326 kJ/kg.
Also searched as BTU/lb to kJ/kg, btu per pound to kilojoule per kilogram and enthalpy btu/lb to kj/kg.
1 BTU/lb = 2.326 kJ/kg
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk BTU per pound to kilojoule per kilogram converter to paste a column from Excel.
How to Convert BTU per Pound to Kilojoule per Kilogram
- 1 BTU/lb = 2.326 kJ/kg
- 1 kJ/kg = 0.4299226139 BTU/lb
- Example: convert 1000 BTU/lb to kJ/kg: 1000 BTU/lb = 1000 × 2.326 kJ/kg = 2326 kJ/kg
Formula
kJ/kg = BTU/lb × 2.326
Derivation from SI units:
- 1 BTU_IT/lb = 1055.05585262 J ÷ 0.45359237 kg = 2326 J/kg exactly.
- 1 kJ/kg = 1000 J/kg.
- 1 BTU/lb = 2326 J/kg ÷ 1000 J/kg per kJ/kg = 2.326 kJ/kg
Both units are defined exactly, so the factor is exact. BTU per Pound definition: BTU per pound; Kilojoule per Kilogram definition: kilojoule per kilogram.
Worked examples
- Water’s latent heat of 970 BTU/lb is 2256.22 kJ/kg.
970 BTU/lb × 2.326 = 2256.22 kJ/kg - 1000 BTU/lb is 2326 kJ/kg.
1000 BTU/lb × 2.326 = 2326 kJ/kg
BTU per Pound to Kilojoule per Kilogram conversion table
| BTU per Pound (BTU/lb) | Kilojoules per Kilogram (kJ/kg) |
|---|---|
| 1 BTU/lb | 2.326 kJ/kg |
| 10 BTU/lb | 23.26 kJ/kg |
| 100 BTU/lb | 232.6 kJ/kg |
| 144 BTU/lb | 334.944 kJ/kg |
| 500 BTU/lb | 1163 kJ/kg |
| 970 BTU/lb | 2256.22 kJ/kg |
| 1000 BTU/lb | 2326 kJ/kg |
| 1150 BTU/lb | 2674.9 kJ/kg |
| 13000 BTU/lb | 30238 kJ/kg |
| 19000 BTU/lb | 44194 kJ/kg |
Where it's used
Enthalpies and heating values in BTU/lb from US steam tables and fuel data are converted to kJ/kg. Multiply by 2.326 exactly.
BTU per Pound to other specific energy units
| Conversion | 1 BTU/lb equals |
|---|---|
| BTU per pound to kilojoule per kilogram | 2.326 kJ/kg |
| BTU per pound to megajoule per kilogram | 0.002326 MJ/kg |
| BTU per pound to kilocalorie per kilogram | 0.5555555556 kcal/kg |
| BTU per pound to joule per kilogram | 2326 J/kg |
| BTU per pound to calorie per gram | 0.5555555556 cal/g |
| BTU per pound to kilowatt-hour per kilogram | 0.0006461111111 kWh/kg |
| BTU per pound to joule per gram | 2.326 J/g |
Frequently asked questions
How many kJ/kg is 1 BTU/lb?
Exactly 2.326 kJ/kg: 1055.05585262 J ÷ 0.45359237 kg.
Is the factor exact?
Yes, with the International Table BTU the ratio comes out to exactly 2326 J/kg.
How many kilojoules per kilogram are in 1 BTU per pound?
1 BTU/lb = 2.326 kJ/kg.
How do I convert BTU per pound to kilojoules per kilogram?
Multiply the value in BTU/lb by 2.326. For example, 1000 BTU/lb × 2.326 = 2326 kJ/kg.
Is the BTU/lb to kJ/kg conversion exact?
Yes. Both units are defined exactly, and 1 BTU/lb is exactly 2.326 kJ/kg.
Sources
- 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".
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4 (derived units with special names).
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). BTU per Pound to Kilojoules per Kilogram (BTU/lb to kJ/kg). Retrieved October 29, 2026, from https://scientificconverters.com/specific-energy/btu-per-pound-to-kilojoules-per-kilogram/
IEEE
Scientific Converters, "BTU per Pound to Kilojoules per Kilogram (BTU/lb to kJ/kg)," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/specific-energy/btu-per-pound-to-kilojoules-per-kilogram/