Fuel Stops Needed Calculator
Calculate how many fuel stops you need on a road trip based on your vehicle's fuel range and the total distance.
How to use this tool
- Enter your total trip distance.
- Enter your vehicle's fuel range on a full tank (check your manual or use past experience).
- The calculator tells you how many fuel stops to plan and how much range remains on the final leg.
Plan your road trip fuel stops in advance so you never run out on the road.
Formula
Full tanks needed = ⌈Distance ÷ Range per tank⌉
Fuel stops = Full tanks needed − 1
Range used on final leg = Distance − (Fuel stops × Range per tank)
How it works
This calculator determines the number of times a driver must refuel on a road trip by dividing total distance by the vehicle's per-tank range and rounding up to the nearest whole number of tanks (ceiling function). Since the first tank is already in the vehicle at departure, the number of stops equals tanks needed minus one. The remaining range used on the final leg is the distance left after all full-tank legs are completed. The calculation assumes each tank provides exactly the stated range; real-world range varies with speed, load, and driving style.
Worked example
Worked example
- Total distance = 800 km; fuel range per tank = 300 km.
- Full tanks needed = ⌈800 ÷ 300⌉ = ⌈2.667⌉ = 3 tanks.
- Fuel stops = 3 − 1 = 2 stops.
- Range used on final leg = 800 − (2 × 300) = 800 − 600 = 200 km.
Fuel stops needed = 2; range used on final leg = 200 km
Key terms
- Fuel range
- The maximum distance a vehicle can travel on a full tank of fuel under typical driving conditions.
- Ceiling function (⌈x⌉)
- A mathematical operation that rounds a number up to the nearest integer; used here to ensure enough full tanks to cover the entire distance.
- Litres per 100 km (L/100 km)
- A fuel consumption metric common in Europe and Australia expressing how many litres are used per 100 km driven.
- Miles per gallon (MPG)
- A fuel efficiency metric used primarily in the US and UK, stating how many miles a vehicle travels per gallon of fuel.
- Reserve fuel
- Fuel remaining in the tank beyond the manufacturer's stated usable range, typically a small margin to prevent running dry.
Frequently asked questions
- How do I calculate fuel stops on a road trip?
- Divide the total distance by your vehicle's range per tank and round up to get the total number of tanks needed. Subtract 1 for the initial full tank to get the number of stops required.
- How do I find fuel stations on a route?
- Use Google Maps, GasBuddy, or your vehicle's built-in navigation to locate fuel stations along your planned route.