Petrol Price Impact Calculator
When the petrol price changes, find out exactly what it costs you: enter the old and new price per litre and how many litres you use each month.
Results
Price change
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Extra monthly cost
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Extra annual cost
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New monthly budget
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Extra monthly cost = (new price - old price) x monthly litres. Annual cost = monthly cost x 12. Prices shown without a currency symbol so the tool works for any currency.
How to use
- Enter the old petrol price per litre and the new price per litre (check your local fuel station notice for the latest rate).
- Enter how many litres you use in a typical month — check a few recent receipts if you are not sure.
- Press Calculate to see the extra monthly and annual cost, the percentage rise and your new monthly fuel budget.
Ways to cut the extra cost
- Keep tyres at the recommended pressure — under-inflated tyres burn noticeably more fuel.
- Combine short trips into one drive and avoid idling the engine while parked.
- Smooth driving at a steady speed uses far less fuel than quick starts and hard braking.
- Regular servicing (air filter, engine oil, spark plugs) keeps fuel consumption close to the factory figure.