Fuel Savings Calculator
Enter your annual mileage and your fuel economy before and after to estimate how much you'll save on yearly fuel costs and how much CO2 you'll cut. See the impact of eco-driving or switching cars in real numbers.
Input
Enter your annual driving distance and your fuel economy before and after, and we'll estimate how much you can cut from your yearly fuel cost and CO2 emissions.
Result
Annual fuel cost savings
$48,611.11
About $4,050.93/month saved
Annual CO2 reduction
644.4 kg
Annual fuel cost (before)
$145,833.33
Annual fuel cost (after)
$97,222.22
Before vs. after comparison (annual)
| Item | Before | After | Saved |
|---|---|---|---|
| Fuel used | 833.3 L | 555.6 L | 277.8 L |
| Fuel cost | $145,833.33 | $97,222.22 | $48,611.11 |
| CO2 emissions | 1,933.3 kg | 1,288.9 kg | 644.4 kg |
How it works
- Annual fuel used is calculated as annual driving distance divided by fuel economy (km/L). The fuel saved is the difference between the before and after amounts.
- Annual fuel cost is fuel used multiplied by the fuel price per liter. The difference between the before and after costs is shown as the headline "annual fuel cost savings."
- CO2 emissions are fuel used multiplied by the CO2 emission factor (kg-CO2/L). Default factors are roughly 2.32 for gasoline, 2.58 for diesel, and 2.49 for kerosene; you can enter your own. These are estimates only.
- Fuel prices vary widely by country, region, and over time. Enter your local pump price (for example from a recent receipt) for a more realistic estimate.
- Fuel economy changes a lot with driving style, season, load, and traffic. Using your real average economy rather than catalog figures improves accuracy.
- Results use representative factors and are estimates only. They do not guarantee actual fuel costs or CO2 emissions; use them as a rough guide.
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