Fuel Efficiency - Mass conversion
1 joule/kilogram (J/kg) equals 0.000429922614 btu/pound (Btu/lb). Enter any value below to convert from J/kg to Btu/lb.
Enter a value and choose units. Results update instantly.
1 J/kg = 0.0004299226 Btu/lb
| Unit | Value |
|---|---|
| Joule/kilogram J/kg | 1 |
| Kilojoule/kilogram kJ/kg | 0.001 |
| Calorie/gram cal/g | 0.0002388459 |
| Kilocalorie/kilogram kcal/kg | 0.0002388459 |
| Btu/pound Btu/lb | 0.0004299226 |
| Btu/kilogram Btu/kg | 0.0009478134 |
Formula
Use this relationship for a direct conversion:
2 J/kg = 0.0008598452 Btu/lb.
SI relationships follow the cited reference. Conventional and domain-specific factors use the established ConvertWin factor inventory; verify safety-critical work against the governing standard.
Quick reference
| Joule/kilogram (J/kg) | Btu/pound (Btu/lb) |
|---|---|
| 0.01 | 0.0000042992 |
| 0.1 | 0.0000429923 |
| 1 | 0.0004299226 |
| 2 | 0.0008598452 |
| 5 | 0.0021496131 |
| 10 | 0.0042992261 |
| 25 | 0.0107480653 |
| 50 | 0.0214961307 |
| 100 | 0.0429922614 |
| 1,000 | 0.4299226139 |
From unit
Joule/kilogram (J/kg) is the base unit of Fuel Efficiency - Mass in the International System of Units (SI).
Symbol: J/kg
To unit
Btu/pound (Btu/lb) is a unit of Fuel Efficiency - Mass. 1 Btu/lb = 2,326 J/kg
Symbol: Btu/lb
Keep converting
Source
The SI framework is checked against NIST Guide for the Use of the International System of Units; conventional factors come from the extended factor inventory. Calculations use full internal precision before display rounding.
View the complete fuel efficiency - mass converterQuestions
Use the formula Btu/lb = J/kg x 0.000429922614. 1 joule/kilogram (J/kg) equals 0.000429922614 btu/pound (Btu/lb).
SI relationships follow the cited reference. Conventional and domain-specific factors use the established ConvertWin factor inventory; verify safety-critical work against the governing standard.
