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Diesel vs Gasoline Calculator
Compare yearly fuel cost of a diesel car against a petrol car.
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Compare yearly fuel cost of a diesel car against a petrol car.
Diesel vs Gasoline Estimator
Enter your numbers below for an instant estimate.
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💡 Tip: Cost = miles / mpg x 4.546 x price per litre.
How It Works
Key concepts behind this calculator
1
Enter Values
Fill in each field with your own numbers.
2
Calculate
Results update as you change the inputs.
3
Review
Read the breakdown and the explanation.
4
Adjust
Change values to compare scenarios.
Quick Reference Guide
Diesel Quick Guide
Typical values for reference.
| Miles | Diesel mpg | Petrol mpg | Saving |
|---|---|---|---|
| 10000 | 55 | 45 | £183.68 |
| 5000 | 60 | 48 | £99.45 |
| 20000 | 50 | 40 | £500.07 |
| 12000 | 45 | 45 | £60.61 |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Common Questions
Diesel vs Gasoline Calculator FAQ
Answers to common questions about this calculator.
Per mile fuel use is lower, but the price per litre is often higher.
No, fuel only.
Tax, servicing and zone charges.
Yes, imperial gallons.