zacdaddytools
Plan your journey cost, fuel required and a fair split between passengers.
Enter your trip, vehicle efficiency and the price at the pump.
Use the current pump price for your filling station. The pre-filled value is an editable example, not a current UK average.
Updates instantly as you type.
Estimated fuel cost
£17.58
Weekend trip · one way
Total distance
120.00 miles
Fuel required
12.12 L
Per passenger
£8.79
Cost per mile
£0.15
This is a fuel-only estimate. Traffic, driving style, vehicle load and route conditions can change real consumption.
Enter the one-way distance, choose miles or kilometres, add your vehicle efficiency and enter the pump price. The calculator supports UK MPG, US MPG, litres per 100 km and kilometres per litre, and can convert prices quoted per litre, UK gallon or US gallon.
Turn on return journey to double the travel distance. Add the number of passengers to see an equal fuel-cost share per person alongside total fuel, total cost and cost per distance unit.
The selected efficiency is converted internally to litres per 100 km. Total litres equal distance in kilometres multiplied by litres per 100 km, divided by 100. The fuel cost then uses the entered price after converting it to a per-litre amount.
A 100-mile trip at 50 MPG (UK) uses about 2 UK gallons, or 9.09 litres.
At £1.45 per litre, the estimated fuel cost is about £13.18.
Traffic, speed, weather, terrain, tyre pressure, vehicle load and driving style all affect economy. Dashboard estimates can also differ from measured fuel use. Treat the result as a planning estimate and leave a margin for detours or changing conditions.
FAQs
A UK imperial gallon is larger than a US gallon, so the same vehicle and journey produce different MPG numbers under each convention.
Yes. Enable return journey and the calculator doubles the entered one-way distance before estimating fuel and cost.
No. It divides estimated fuel cost equally and does not include tolls, parking, vehicle wear or driver time.
A recent real-world figure from your own driving usually gives a more practical journey estimate than a laboratory rating.