Diesel Savings Calculator
Estimate fuel card savings
Enter monthly gallons, discount cents per gallon and monthly card fee.
When to Use This Calculator
Use this calculator when a provider publishes or quotes a cents-per-gallon discount and you want to see the difference between gross savings and savings after a monthly card fee. It works best for quick screening before you compare the fee schedule, accepted locations and payment terms.
Input Fields
| Field | What to enter | What to verify |
|---|---|---|
| Gallons per month | Your expected diesel gallons for a normal month. | Use recent fuel records if available, not a target volume. |
| Discount cents per gallon | The stated discount, entered as cents, such as 20 for $0.20. | Confirm the reference price and eligible locations. |
| Monthly card fee | Known recurring account, card or plan fee. | If the fee is not clearly published, check with the provider. |
Formula
Gross monthly savings = gallons per month × discount per gallon. Net monthly savings = gross monthly savings - monthly card fee. Annual net savings = net monthly savings × 12.
How to Read the Result
The result is an estimate. It does not include transaction fees, out-of-network fees, cash-price differences, taxes, DEF purchases or route changes. If a card only discounts fuel at selected stops, compare the result against the gallons you can realistically buy in-network.
For a fuller comparison, use the fuel card fee calculator and read the diesel savings calculator guide.