燃油效率（质量）是距离的距离与所消耗的燃料质量的比率，通常以每公斤公斤（km/kg）为单位。
1 gal/mi = 0.264 km/kg
1 km/kg = 3.785 gal/mi
例子:
将15 加仑每英里转换为每公斤公斤：
15 gal/mi = 3.963 km/kg
| 加仑每英里 | 每公斤公斤 |
|---|---|
| 0.01 gal/mi | 0.003 km/kg |
| 0.1 gal/mi | 0.026 km/kg |
| 1 gal/mi | 0.264 km/kg |
| 2 gal/mi | 0.528 km/kg |
| 3 gal/mi | 0.793 km/kg |
| 5 gal/mi | 1.321 km/kg |
| 10 gal/mi | 2.642 km/kg |
| 20 gal/mi | 5.283 km/kg |
| 30 gal/mi | 7.925 km/kg |
| 40 gal/mi | 10.567 km/kg |
| 50 gal/mi | 13.209 km/kg |
| 60 gal/mi | 15.85 km/kg |
| 70 gal/mi | 18.492 km/kg |
| 80 gal/mi | 21.134 km/kg |
| 90 gal/mi | 23.775 km/kg |
| 100 gal/mi | 26.417 km/kg |
| 250 gal/mi | 66.043 km/kg |
| 500 gal/mi | 132.086 km/kg |
| 750 gal/mi | 198.129 km/kg |
| 1000 gal/mi | 264.172 km/kg |
| 10000 gal/mi | 2,641.72 km/kg |
| 100000 gal/mi | 26,417.2 km/kg |
规则