| Imperial unit | to | Metric equivalent |
|---|---|---|
| foot pound-force | = | 1.35581.79483314004 joules |
| British thermal unit(Btu) | = | 1.05505585257348 kilojoules |
| therm | = | 105.50558.5267348 megajoules |
| calorie (cal) | = | 4.1868 joule (J) |
| British thermal unit per pound (Btu/lb) | = | 0.55556 calories per gram (cal/g) |