Fuel Range Remaining Calculator
Calculate exactly how far you can drive on your remaining fuel.
Enter fuel level, tank size, and fuel efficiency to get your range.
Knowing exactly how far you can drive on your remaining fuel helps you plan long trips, decide whether to refuel now or later, and avoid the stressful situation of running out of fuel on the road.
The formula: Range = Remaining Fuel × Fuel Efficiency
For example:
- Remaining fuel: 20 liters
- Fuel efficiency: 12 km/L (or equivalently, 28 mpg)
- Range: 20 × 12 = 240 km
Understanding your car’s DTE (Distance to Empty): Modern cars show a “Distance to Empty” or “Range” reading on the dashboard. This estimate is calculated from your recent average fuel economy and current fuel level. It updates as you drive and is reasonably accurate under normal conditions, but can be off by 10–15% if your recent driving was unusually efficient or inefficient.
Fuel efficiency varies significantly by conditions:
| Condition | Effect on economy |
|---|---|
| Highway driving | Best economy — typically 15–25% better than mixed |
| City stop-go | Worst economy — frequent acceleration burns more fuel |
| Air conditioning | Reduces economy by 5–15% |
| Headwind | Can reduce economy by 10–20% at highway speeds |
| Heavy load | Reduces economy by 1–2% per 45kg (100lb) |
| Cold weather | Engine warm-up reduces economy by 10–15% for short trips |
The low fuel light: In most vehicles, the low fuel warning activates when approximately 10–15% of tank capacity remains:
- For a 50-liter tank: ~5–7.5 liters remaining (~60–90 km range at 12 km/L)
- For a 60-liter tank: ~6–9 liters remaining
Safety reserve: It’s good practice to calculate your range assuming only 80–85% of your apparent remaining fuel is usable — fuel gauges are not perfectly precise, and driving on near-empty can draw sediment into the fuel system and may stress the fuel pump (which is often cooled by the surrounding fuel).