How do I calculate petrol or diesel cost for a trip?

Use distance in miles, vehicle MPG and the fuel price per litre. Driverz converts MPG to litres used and multiplies it by the pump price to estimate the trip cost.

Does the calculator work for return trips?

Yes. Choose return trip and the calculator doubles the distance before estimating fuel used, total cost and cost per mile.

Why is my real trip cost different from the estimate?

Traffic, speed, tyre pressure, weather, driving style, hills, passengers and luggage can all change real fuel use. The calculator is an estimate based on the values you enter.

Should I use petrol or diesel price per litre?

Use the price for the fuel you will actually buy. You can check nearby petrol and diesel prices on Driverz before using the calculator.

UK driving cost tool

Trip cost calculator

Estimate petrol or diesel cost for a UK journey using miles, MPG and pump price.

Start here: enter your journey details and get an instant estimate.

Plan the cost before you set off. Use the estimate with live nearby fuel prices to compare routes, commutes and weekend trips.

Petrol or diesel Works with any UK pump price in pence per litre.

One-way or return Quickly double the distance for a round trip.

Cost per mile Useful for comparing routes or claiming mileage.

Quick answer: To estimate trip fuel cost, divide miles by MPG, convert gallons to litres, then multiply by the fuel price per litre. Driverz does the conversion for you and shows total cost, litres used and cost per mile.

How the trip cost is calculated

The calculator uses UK miles per gallon and UK pump prices in pence per litre.

Formula

Fuel used in litres = (miles ÷ MPG) × 4.54609
Trip cost = litres used × pence per litre ÷ 100

Popular UK trip cost examples

These examples use the values in the calculator. Change distance, MPG or fuel price to match your own car and route.

10-mile local driveCalculate to update.

50-mile day tripCalculate to update.

120-mile long journeyCalculate to update.

Use live fuel prices before you calculate

For a better estimate, check the current petrol or diesel price near you first, then enter that pence-per-litre value above.

Birmingham fuel prices Manchester fuel prices Leeds fuel prices Reading fuel prices Bristol fuel prices

Use this with other Driverz tools

Trip cost works best when combined with MPG, cost per mile and live station price tools.

Trip cost calculator FAQs

Does this calculate the exact cost?

It gives an estimate based on distance, MPG and pump price. Traffic, speed, weather, tyres and load can change the real result.

Should I use motorway fuel prices?

Use the price you expect to pay. Motorway forecourts are often more expensive, so checking nearby stations before a long journey can help.

Can I use it for diesel?

Yes. Enter the diesel price per litre and your vehicle MPG. The calculation works the same way for petrol and diesel.

What if I only know litres per 100 km?

Use the Driverz MPG calculator first, then return here with an MPG estimate for this trip calculator.