The Real Cost of Owning a Car (and Going Electric)
Beyond the sticker price — depreciation, financing, fuel, insurance and maintenance — plus how electric cars compare on running cost, range and charging time, with a total-cost view.
Fuel Savings Calculator
Verified formula Updated Jun 2026 Private — runs on your device
Verified formula
Private
Annual fuel saving
₹41,667
- Litres saved per year
- 416.7
For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.
How to use the Fuel Savings Calculator
The Fuel Savings Calculator works out your annual fuel saving, along with 1 related figure in an instant. Enter old fuel economy, new fuel economy and annual distance and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.
- Enter the old fuel economy.
- Enter the new fuel economy.
- Enter the annual distance.
- Enter the fuel price per litre.
- Read off your annual fuel saving, together with litres saved per year — the calculator updates automatically, with no button to press.
Formula
The Fuel Savings Calculator uses the formula:
Annual fuel saving = (Annual distance ÷ Old fuel economy - Annual distance ÷ New fuel economy) × Fuel price per litre
Worked example
For example, with old fuel economy of 12 km/l, new fuel economy of 18 km/l, annual distance of 15,000 km and fuel price per litre of ₹100, the annual fuel saving is ₹41,667.
| Old fuel economy | 12 km/l |
|---|---|
| New fuel economy | 18 km/l |
| Annual distance | 15,000 km |
| Fuel price per litre | ₹100 |
| Annual fuel saving | ₹41,667 |
|---|---|
| Litres saved per year | 416.7 |
Results are estimates for educational use, not professional advice.
Frequently asked questions
Work out the litres each vehicle uses over the distance, take the difference and multiply by the fuel price. Going from 12 to 18 km/l over 15,000 km saves about 41,667 a year.
It turns an abstract km/l difference into real annual savings, which helps when choosing between vehicles or weighing an upgrade.
It uses one price you enter. If prices rise, your savings grow, so revisit the figure with current prices.
On fuel, yes, but factor in the cost of the more efficient vehicle. Large savings can justify a higher purchase price over time.
Enter the old fuel economy. Enter the new fuel economy. Enter the annual distance. Enter the fuel price per litre. Read off your annual fuel saving, together with litres saved per year — the calculator updates automatically, with no button to press.
Related guides
Fuel Savings Table: Annual fuel saving by Old fuel economy
Reference table of annual fuel saving for Fuel Savings across a range of old fuel economy values — exact, engine-computed figures you can read off at a glance.
How to Calculate Fuel Savings: Formula, Steps & Examples
Learn how to calculate Fuel Savings — the formula explained step by step, with worked examples and a free calculator to check your answer.