Free UK Fuel Economy Calculators
A suite of free calculators to help you understand the true cost of running your car. Work out your real-world MPG, find the cheapest local fuel station, calculate journey costs, and compare the annual running costs of different vehicles — including petrol, diesel and electric.
Real-World MPG & Fuel Cost Calculators
Which Local Fuel Station?
Use our database of 8026 fuel stations to find the cheapest station near you.
FindCompare Car Running Costs
Compare Two Cars
Compare the full annual running costs — fuel, tax, insurance and more — of two vehicles.
ComparePetrol vs Diesel Break-Even
Find out how many miles you need to drive before the diesel version of a car pays back its higher purchase price.
CalculateTwo Cars vs One
Would two cheaper cars cost less to run than one car covering all your miles? Find out here.
CompareOne Car vs Two
Thinking of replacing two cars with one? See whether a single new car would be cheaper to run.
CompareFleet, Journey & Budget Tools
Fleet Running Costs
Calculate and compare the annual running costs for a fleet of up to four vehicles.
CalculateWeekly/Monthly/Annual Fuel Cost
Calculate your fuel cost over a period based on MPG, distance and price.
CalculateHow Much Will a Journey Cost?
Calculate a journey cost based on the current fuel price and distance.
CalculateHow Far Will £X Get Me?
How far will you get from a certain value of fuel? We've all wondered this, especially at motorway services!
CalculateLive UK Fuel Prices & Data
UK Fuel Price Statistics
Live national and regional fuel price averages, brand comparisons, price trends and cheapest stations nationwide.
View StatsIndependently Validated Prices
We apply automated quality checks to every price update, correcting common reporting errors to give you the most accurate data available from the UK mandatory fuel price scheme.
How it worksAbout MPG Calc
MPG Calc is a free, independent UK fuel economy toolkit. Every calculator on this site uses your real-world figures — not manufacturer estimates — so the results reflect what you actually spend on fuel.
Our fuel station finder covers over 8026 UK stations with prices sourced from the government's mandatory reporting scheme and updated every 30 minutes. We apply automated quality checks to every price update, correcting common reporting errors before the data reaches you.
Whether you're budgeting for a commute, comparing cars before buying, or just wondering how far £20 of petrol will take you — the tools above give you a clear, accurate answer in seconds. No signup required.