CNG vs petrol vs EV: cost per kilometre
At current fuel prices and typical real-world mileage for each fuel type, here's what 1,500km a month actually costs across all three. Home-charged EVs come out well ahead on running cost — the trade-off is the vehicle's upfront price and charging access, not covered here.
Where a CNG conversion kit pays for itself
A petrol-to-CNG conversion kit only makes sense once the monthly saving covers the kit cost within a reasonable ownership horizon — there's no fixed answer since it depends on distance driven and kit price. Use the full Running Cost Comparison calculator with your own mileage, fuel prices, and kit cost to see the simple payback in months.
Fuel prices sourced from the same fuel-price data every vehicle calculator uses — see the rates reference page. Mileage figures are typical/illustrative — your vehicle's actual mileage will differ; use the Mileage & Fuel Average Calculator to measure yours.