Focused calculator hub

Fuel & MPG Calculators

Calculate UK MPG, fuel costs, annual spend, savings and real-world consumption using your own mileage and pump-price inputs.

7 tools in this hubUK unitsNo sign-up
Fuel & MPG Calculators illustration

Which calculator should I use?

Start with the question you actually have. This table sends you to the narrowest tool first, so you do not need to work through unrelated inputs.

If your question is…Start here
You know miles and litresMPG Calculator
You know MPG and pump priceFuel Cost Per Mile
You are planning one tripJourney Fuel Cost
You want a yearly budgetAnnual Fuel Cost
You are comparing two carsFuel Savings
You are comparing UK MPG with L/100kmMPG ↔ L/100km

Use real-world consumption where possible

Fuel spend is driven by distance, actual efficiency and pump price. The tools in this hub deliberately separate those inputs so you can test what changes the result.

Calculator directory

All Fuel & MPG tools

Each calculator has its own focused URL, worked explanation and related-tool links.

How these calculators are produced

MotoringCalcs separates defined conversions from scenario estimates. Exact unit relationships use direct arithmetic. Where a result depends on assumptions — such as drivetrain difference, real-world efficiency or future cost — the assumption is visible and editable rather than silently fixed.

Inputs remain in your browser and the tools do not require an account. Where manufacturer specifications, measured vehicle data or your actual tariff are available, use those values in preference to generic example inputs.

These tools are for calculation, comparison and planning. They do not replace manufacturer guidance, inspection or professional engineering advice where safety or fitment is involved.