Clean Air Zone and Emissions Tools
Estimate whether a car is likely to meet ULEZ or Clean Air Zone standards and what driving in a zone costs. Always confirm a specific vehicle with the official TfL or GOV.UK checker.
Popular in this group
Tools in this group
Car CO2 Emissions Calculator
Enter your yearly miles and the official CO2 in g/km (and your mpg if you know it): see the tonnes of CO2 a year and the first-year tax band.
Open →Catalytic Converter Theft Risk & Security Checker
Choose your vehicle type, where it is parked and what protection you have to get a rough catalytic converter theft risk indicator and practical prevention steps.
Open →Clean Air Zone Checker & CAZ Fee Calculator
Pick a Clean Air Zone and enter your vehicle's fuel, Euro standard and type to see whether it is charged and how much per day. Charges checked 3 November 2026; confirm a specific plate on GOV.UK.
Open →Euro Emissions Standard Checker & Vehicle Identifier
Enter the fuel and the month the car was first registered to see the minimum Euro emissions standard it had to meet, and whether that is enough for London's ULEZ and the Class D Clean Air Zones.
Open →Fuel Duty Calculator & Pump Price Tax Breakdown
Type a pump price in pence per litre to see how much is fuel duty (52.95p a litre), how much is 20% VAT and how much is fuel and retailer margin. Duty rate checked 3 November 2026.
Open →London Congestion Charge Calculator & Auto Pay
Work out what the London Congestion Charge costs for the days you drive: £18 a day from 2 January 2026, £21 if paid up to three days late, and the Auto Pay discounts for electric vehicles. Rates checked 3 November 2026.
Open →London ULEZ Checker: Estimate by Fuel & Registration Date
Pick the fuel and enter the first registration date to see whether a car of that age is likely to meet the ULEZ standard and avoid the £12.50 daily charge, then confirm on TfL’s checker.
Open →