Trip Fuel Stops Calculator
Calculate how many fuel stops a road trip requires given vehicle range and total distance.
What this calculates
Range anxiety isn't just for EVs. Knowing how many fuel stops a long trip needs — and roughly where they'll fall — helps with planning meals, breaks, and EV charging in particular. This calculator uses total distance, vehicle range, and a usable-range buffer (you don't want to run dry).
Formula & how it works
Usable range = full_range × buffer (typically 0.85 = leave 15% reserve). Stops needed = ceil((distance − usable_range) ÷ usable_range). Spacing = distance ÷ (stops + 1).
Worked example
1,200 mi trip, 400 mi range, 15% buffer. Usable 340 mi. Stops = ceil((1,200 − 340) ÷ 340) = 3. Spaced every ~300 mi.
Frequently asked questions
What buffer should I use?
Gas cars: 10-15% reserve. EVs: 20-25% — chargers can be down, occupied, or further off-route than planned.
What about altitude / cold?
Cold reduces EV range 20-40%; high altitude drops gas mpg ~5-15%. Tighten the buffer in adverse conditions.
Headwind?
20 mph headwind can drop mpg 10-15% at highway speeds. Worth factoring on multi-state trips.
Related calculators
- Fuel CostEstimate the fuel cost of a trip based on distance, your vehicle's mileage, and current fuel price.
- Road Trip TimeEstimate total drive time including fuel, food, and rest stops at any average speed.
- EV ChargingCalculate the cost and time to charge an electric vehicle from any state of charge to any target, at any kW charger speed and electricity rate.