| Standard factors | Metric tonne | Long ton | Barrels | Cubic metres (kilolitres) |
| Metric tonne | 1 | 0.984 | 7.33 | 1.165 |
| Long ton | 1.016 | 1 | 7.45 | 1.128 |
| Barrels | 0.136 | 0.134 | 1 | 0.159 |
| Cubic metres (kilolitres) | 0.858 | 0.887 | 6.289 | 1 |
| Algeria | 8.052 |
| Congo | 7.157 |
| Equatorial Guinea | 7.189 |
| Gabon | 7.442 |
| IR Iran | 7.382 |
| Iraq | 7.379 |
| Kuwait | 7.276 |
| Libya | 7.537 |
| Nigeria | 7.368 |
| Saudi Arabia | 7.323 |
| United Arab Emirates | 7.565 |
| Venezuela | 6.656 |
| OPEC | 7.369 |
| Gasoline | 8.4998 |
| Kerosene | 7.7652 |
| Distillates | 7.2296 |
| Residuals | 6.6208 |