Formula
Petrol annual cost = annual km / 100 x L/100km x fuel price. EV annual cost = annual km / 100 x kWh/100km x electricity price. Saving = petrol cost - EV cost. Payback = EV premium / annual saving.
EV vs Petrol Running Cost Calculator
Compare annual petrol and electric vehicle energy costs and estimate payback on an EV price premium.
Worked example
At 15,000 km, 8.5 L/100km and $2/L, petrol costs $2,550/year. At 18 kWh/100km and $0.28/kWh, EV electricity costs $756/year.
Professional note
Professional note: print the input values, formula, result and date together so the calculation can be reviewed later.
Regional and unit assumptions
Basis: transparent planning arithmetic using the visible inputs and assumptions on this page.
Assumptions and limitations
- This calculator is for planning and education, not legal, tax, medical, immigration, engineering or financial advice.
- Use current official rates, contracts, carrier terms, statutes or professional guidance before relying on the result.
- The default values are examples. Replace them with the figures from the job, invoice, contract, bill, service or record being checked.
Methodology & Accuracy
How this calculator is checked
CalculationTime pages are built around visible arithmetic: the formula, assumptions, worked example and practical limitations are shown so the result can be checked rather than simply trusted.
Formula used
Petrol annual cost = annual km / 100 x L/100km x fuel price. EV annual cost = annual km / 100 x kWh/100km x electricity price. Saving = petrol cost - EV cost. Payback = EV premium / annual saving.
Standard or basis
Basis: transparent planning arithmetic using the visible inputs and assumptions on this page.
Where a calculator follows a named legal, trade or industry standard, that standard is cited visibly. Otherwise the page uses transparent general arithmetic and states its limits.Master's Tip
Professional note: print the input values, formula, result and date together so the calculation can be reviewed later.
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Questions
What is the EV vs Petrol Running Cost Calculator?
This EV running cost calculator compares petrol fuel spend against electricity spend for the same annual kilometres.
Can I rely on this as professional advice?
No. Use it as a transparent planning estimate, then verify the current rule, rate, contract or official source for the decision you are making.