The free UK driving toolkit
Everything you need to put a price on the miles.
Start with a journey, compare energy costs or budget for a whole year. Our tools use your figures and show exactly which assumptions matter.
Quick start
Electric cars & charging
New in v16EV charging cost calculatorCalculate what you will pay to charge from one battery percentage to another. Enter your tariff or public…New in v16EV charging time calculatorEstimate charge duration from a starting percentage to a target. The slower of your charger and your car sets…New in v16Electric car range calculatorEstimate the distance left in an electric car using a realistic energy-consumption figure, not only its…New in v16Home vs public EV chargingEstimate an annual charging bill when part of your mileage is powered by home charging and the rest by public…New in v16Petrol vs electric running costsCompare annual petrol and electric-car energy bills, then estimate how long energy savings alone would take to…
Fuel economy & tank range
Existing toolMPG calculatorCalculate your actual miles per imperial gallonNew in v16Fuel consumption converterConvert an economy figure between the four most common units without confusing UK imperial gallons with smaller…New in v16Fuel tank range calculatorEnter your tank size, how much fuel is left and real-world UK MPG to estimate your remaining driving distance…New in v16Fuel efficiency savings calculatorSee what a change from your current MPG to a new real-world MPG would mean for annual fuel spending.Existing toolPetrol cost calculatorPetrol cost for miles drivenExisting toolDiesel cost calculatorDiesel use for any journeyExisting toolFuel cost per mileEstimate pence per driving mile
Journey budgets & comparisons
New in v16Road trip budget calculatorPlan the full cost of a driving trip, not just petrol. Add tolls, parking, food and overnight stops, then split…New in v16Journey cost split calculatorCalculate what each passenger should contribute for fuel and trip charges. You can choose whether the driver…New in v16Car vs train cost calculatorCompare the direct cash cost of commuting by road and rail using your real timetable, return fare and vehicle…New in v16Annual mileage calculatorBuild a realistic yearly mileage estimate for insurance quotes, car budgets or fuel planning — rather than…Existing toolCommute cost calculatorWeekly, monthly and annual drivingExisting toolPetrol vs diesel calculatorCompare two fuel types over a yearExisting toolCar running costs calculatorTotal annual car ownership costs
Fuel prices & smart refuelling
Business driving & HMRC
Helpful explanations
Helpful guideHMRC mileage: own car vs company carUnderstand the difference between 55p private-car business mileage allowances and HMRC company-car advisory fuel rates, with examples.Helpful guideUK MPG explained: how to compare fuel economyLearn how UK MPG differs from US MPG, how to convert fuel consumption, and why real-world economy changes fuel budgets.Helpful guideChoosing the right fuel price for a journeyUnderstand why UK weekly average petrol prices differ from nearby forecourt reports and how to budget for a journey accurately.
Our method
We use imperial UK MPG, show units next to inputs and distinguish the difference between estimates and live prices. For HMRC calculations, follow the dated guidance on the relevant page. Tools run locally in your browser; values are not sent to a server by these new calculators.