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Petrol Cost Calculator
What your petrol car costs per month and per year at your mileage, your city mix and your local fuel price — the baseline every EV comparison on this site is measured against.
Your numbers
Change any value — results update instantlyPreparing the calculator…
$125.77 / month
Toyota Corolla · Petrol · 1,000 miles/month
- Per mile
- $0.126
- Per year
- $1,509.22
- Fuel used
- 29.3 gal/mo
monthly cost = miles ÷ efficiency × price × (1 + charging loss)
miles = 1,000
home rate = $0.1942/kWh (80% of charging)
public DC rate = $0.4700/kWh (20%)
charging loss = 10%Why your real MPG differs from the sticker
EPA ratings are measured on a fixed cycle. Real economy moves with speed, terrain, load, tyres, temperature and trip length — short trips from cold are especially expensive. Use the city driving slider to match your own mix, and the winter switch for a cold-climate figure.
Frequently asked questions
How do you calculate fuel cost?
Miles divided by MPG, times the fuel price. The MPG is interpolated between the EPA city and highway ratings using your city driving share.
Which fuel price do you use?
The latest EIA weekly US average is prefilled; override it with your own local price.
Does this include tax or registration?
No — fuel cost only.
Can I share my result?
Yes, via the URL.
Is this a quote?
No, an estimate.
Do you cover diesel?
Not currently — the vehicle set here is petrol and hybrid only.
Data sources. Vehicle efficiency: U.S. EPA / DOE fueleconomy.gov (2026 model year). Electricity prices: U.S. EIA Form 861M (residential, June 2026). Fuel prices: U.S. EIA weekly retail (week ending 2026-09-07). All figures are estimates, not quotes.