Convert BTU per Pound to Joules per Gram (BTU/lb to J/g)
1 BTU per pound (BTU/lb) = 2.326 joules per gram (J/g). 1 J/g = 0.4299226139 BTU/lb. Example: 15 BTU/lb = 15 × 2.326 = 34.89 J/g.
Also searched as BTU per pound to J/g, BTU per pound in J/g, BTU per pound into joules per gram, BTU/lb to J/g, BTU/lb in joules per gram, BTU/lb into joule per gram, BTU per pound to joule per gram, BTU/lb to joules per gram converter and how many joules per gram in a BTU per pound.
1 BTU/lb = 2.326 J/g
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk BTU per pound to joule per gram converter to paste a column from Excel.
How to Convert BTU per Pound to Joule per Gram
- 1 BTU/lb = 2.326 J/g
- 1 J/g = 0.4299226139 BTU/lb
- Example: convert 15 BTU/lb to J/g: 15 BTU/lb = 15 × 2.326 J/g = 34.89 J/g
Formula
J/g = BTU/lb × 2.326
Derivation from SI units:
- 1 BTU_IT/lb = 1055.05585262 J ÷ 0.45359237 kg = 2326 J/kg exactly.
- 1 J/g = 1 kJ/kg.
- 1 BTU/lb = 2326 J/kg ÷ 1000 J/kg per J/g = 2.326 J/g
Both units are defined exactly, so the factor is exact. BTU per Pound definition: BTU per pound; Joule per Gram definition: joule per gram.
Worked examples
- A reading of 144 BTU/lb converts to 334.944 J/g.
144 BTU/lb × 2.326 = 334.944 J/g - A value of 1000 BTU/lb is 2326 J/g.
1000 BTU/lb × 2.326 = 2326 J/g
BTU per Pound to Joule per Gram conversion table
| BTU per Pound (BTU/lb) | Joules per Gram (J/g) |
|---|---|
| 1 BTU/lb | 2.326 J/g |
| 10 BTU/lb | 23.26 J/g |
| 100 BTU/lb | 232.6 J/g |
| 144 BTU/lb | 334.944 J/g |
| 500 BTU/lb | 1163 J/g |
| 970 BTU/lb | 2256.22 J/g |
| 1000 BTU/lb | 2326 J/g |
| 1150 BTU/lb | 2674.9 J/g |
| 13000 BTU/lb | 30238 J/g |
| 19000 BTU/lb | 44194 J/g |
Where it's used
BTU per Pound are used for US steam tables, while joules per gram appear in DSC melting and crystallisation enthalpy. Both measure specific energy: enthalpy, latent heat and heating value per mass, so the conversion is a fixed factor.
BTU per Pound to other specific energy units
| Conversion | 1 BTU/lb equals |
|---|---|
| BTU per pound to joule per gram | 2.326 J/g |
| 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 |
Frequently asked questions
How many joules per gram are in 1 BTU per pound?
1 BTU/lb = 2.326 J/g.
How do I convert BTU per pound to joules per gram?
Multiply the value in BTU/lb by 2.326. For example, 15 BTU/lb × 2.326 = 34.89 J/g.
Is the BTU/lb to J/g conversion exact?
Yes. Both units are defined exactly, and 1 BTU/lb is exactly 2.326 J/g.
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). Convert BTU per Pound to Joules per Gram (BTU/lb to J/g). Retrieved October 29, 2026, from https://scientificconverters.com/specific-energy/btu-per-pound-to-joules-per-gram/
IEEE
Scientific Converters, "Convert BTU per Pound to Joules per Gram (BTU/lb to J/g)," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/specific-energy/btu-per-pound-to-joules-per-gram/