Free motoring calculators for UK drivers. Price a journey in petrol or diesel, convert fuel economy between mpg and L/100km, find your first MOT date, check a car tax refund, read a tyre DOT code and work out the age of a number plate. A few tools cover driving in France and the United States.
In This Guide
Quick picks
Not sure where to start? These are the tools people use most in this category.
| I want to | Use this tool |
|---|---|
| Cost of a journey | Fuel Cost Calculator |
| Work out real mpg | MPG Calculator |
| When is the first MOT due? | First MOT Due Date Calculator |
| How old is a number plate? | Number Plate Age Identifier |
Fuel and running costs
3Fuel economy and journey costs.
Ownership and paperwork
5Dates, refunds and checks for UK car owners.
Driving abroad
2Rules and charges outside the UK.
Frequently asked questions
Does the fuel calculator use UK gallons?
Yes. UK mpg uses the imperial gallon of 4.546 litres. The converter also shows US mpg, which uses the smaller US gallon.
When is a first MOT due?
In Great Britain most cars need their first MOT by the third anniversary of first registration. The calculator shows the exact date and the earliest date you can book.
Can I get a refund on car tax?
You get an automatic refund for any full months left when you sell, scrap or SORN a vehicle. The refund calculator shows the amount.
Are these tools official?
No. They are free guides. Always check official records on GOV.UK before you act.
How we build and check these tools
Every tool is built by hand by the Tools Veria Editorial Team, tested with worked examples and checked against official guidance. Read our editorial policy to see how we review figures when rules change. Key sources for this category:
Explore more categories
Browse all tools or read our practical guides.