MotorTools
Car tools that answer useful questions
Free UK calculators and checkers for everyday motoring decisions — before you buy, budget a journey, renew tax or book a service. Each tool includes the formula, worked examples and FAQs so the page is useful even if you never touch the inputs.
Fuel cost calculator
Estimate a journey cost from distance, UK MPG and pump price — with worked examples and FAQs.
Open tool →Car running costs
Build an annual ownership budget: fuel, insurance, tax, servicing, tyres and extras.
Open tool →Car tax calculator
Indicative Vehicle Excise Duty estimate, plus how UK tax bands actually work.
Open tool →Tyre pressure checker
Record cold pressures, convert PSI ↔ bar, and avoid sidewall-maximum mistakes.
Open tool →Service interval planner
Compare miles and months since your last service with the handbook schedule.
Open tool →Tools for buying and owning a car
Running costs vary with fuel economy, annual mileage, insurance, tax class, servicing and tyres. Start with an estimate, then compare the result with the exact car’s handbook and the latest GOV.UK guidance. Our calculators are deliberately transparent rather than pretending an estimate is a quote.
What the results mean
Use a calculator to compare scenarios, not to make a safety-critical decision on its own. Tyre pressures, MOT status and service requirements should always be checked against the vehicle registration, manufacturer data or an authorised source.