Fuel-price sensitivity
What happens if every effective pump price on the route moves by the same percentage? Fuel usage stays unchanged.
OneFreePlace · Tool #129
Model real fuel spend across different roads, economies and pump prices—without losing the exact baseline.
Build a fuel-only route with mixed distance, economy and price units. Separate city/highway or country-by-country segments, apply a transparent real-world consumption adjustment, handle round trips and repeat journeys, split the bill, compare price and efficiency scenarios, and estimate minimum refuelling needs from tank capacity.
✓ MPG US + Imperial✓ L/100km + km/L
✓ Mixed price units✓ Route segments
✓ Tank planner + CSV
Fuel Cost Calculator
Mixed units · route segments · sensitivity · tank planning
Fuel route
Give each route segment the economy and fuel price it actually uses.
Whole-trip adjustmentsThe exact route estimate and budget cushion remain separate.
Fuel-use adjustment changes estimated consumption (for example +10% for tougher real-world conditions). Budget cushion does not change the exact estimate; it only creates a safer spending target.
Sharing & currency displayNo exchange-rate conversion is performed.
Estimated fuel cost
Calculating—
exact route fuel estimate
Enter a valid route.
Fuel required——
Total distance——
Route equivalent economy——
Weighted fuel price—cost ÷ liters consumed
Cost per 100 km——
Cost per person——
Budget with cushion——
Segment fuel audit—
Consumption sensitivity
What happens if actual fuel use is better or worse than your current route estimate? Pump prices stay unchanged.
Tank & minimum-refuel planner
Capacity math only: estimate how much usable fuel you start with and the minimum number of refuel events required while preserving a chosen reserve. Station locations are not modeled.
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Unit rules kept explicit
US gallon = 3.785411784 L. Imperial gallon = 4.54609 L. International mile = 1.609344 km. MPG US and MPG Imperial are therefore not interchangeable.
For L/100 km, lower is better. For MPG, km/L and mi/L, higher is better. Segment pricing is interpreted as the effective price of fuel consumed on that segment—not necessarily the exact station where you purchased it.
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The exact estimate and safety cushion are deliberately separated.Your main result is calculated only from distance, economy, price, route multiplier and fuel-use adjustment. The optional budget cushion appears separately so it can never silently inflate the underlying fuel estimate.