Truck Fuel Savings Calculator for Small Fleets
Diesel is the largest controllable cost in a 1–20 truck operation. Enter your numbers to see what a discount fuel card, less idling and a small MPG gain are worth to you each year — then take the three steps that actually capture it.
How do small trucking fleets save the most on fuel?
Three levers cover almost all of it: a discount fuel card (typically $0.30–$0.90 off per gallon at in-network stops), cutting idle time (about 0.8 gallons burned per idle hour), and raising MPG by 0.3–0.5 through speed, tire pressure and route discipline. Engine-connected ELD data is what shows you where each one is leaking.
Last verified by ELD Hub.
Your operation
Savings levers
Idle math uses 0.8 gallons per idle hour over 22 working days a month — the figure the FMCSA and most engine manufacturers publish for a modern sleeper tractor.
Estimated annual fuel savings
$42,530
$14,177 per truck · 21.2% of a $200,571 fuel bill
- Fuel card discount
- $23,143
- Idle reduction
- $7,413
- MPG improvement
- $11,974
Where diesel money actually leaks in a small fleet
Big carriers negotiate fuel networks; small fleets pay retail and lose the rest to habits nobody is measuring. These are the leaks in order of size for a 1–20 truck operation.
- Retail pump price with no discount network — the single biggest and easiest fix.
- Idling for HVAC and hotel loads: 3 hours a day is roughly 790 gallons a year per truck.
- Speed: every 1 mph above 62 mph costs about 0.1 MPG.
- Under-inflated tires and dragging brakes — a 10 psi shortfall costs about 1% MPG.
- Out-of-route miles from bad dispatching and missed reroutes.
- Buying fuel in high-tax states without planning the IFTA impact.
Fuel savings by fleet size (at $3.90 diesel)
| Fleet size | Gallons / year | Card savings | Idle + MPG savings | Total / year |
|---|---|---|---|---|
| 1 truck | 17,100 | $7,700 | $5,000 | $12,700 |
| 3 trucks | 51,400 | $23,100 | $15,000 | $38,100 |
| 5 trucks | 85,700 | $38,500 | $25,000 | $63,500 |
| 10 trucks | 171,400 | $77,100 | $50,000 | $127,100 |
Assumes 9,000 miles per truck per month at 6.3 MPG, a $0.45/gallon card discount, 3 idle hours cut per day and a 0.4 MPG gain. Your result depends on lanes and network coverage.
Fuel savings start with data you already generate
ELD Hub connects to the engine, so idle time, speeding and route miles are visible per truck and per driver — for $15 per truck per month, no contract. Works with PT-30 and IOSiX hardware you may already own.
Fuel savings questions from small fleets
How much can a small fleet realistically save on fuel?
Most 1–20 truck fleets save $0.30–$0.90 per gallon by combining a discount fuel card with route and idle discipline. On 1,800 gallons per truck per month that is roughly $650–$1,900 per truck per year.
Do fuel cards cost anything?
The AtoB card ELD Hub carriers use has no monthly card fee. You save on the per-gallon price at in-network stops and get spend controls per driver and per truck.
Does an ELD help reduce fuel cost?
Yes, indirectly. Engine-connected ELD data shows idle time, hard braking, speeding and out-of-route miles — the four habits that burn the most diesel. ELD Hub is $15 per truck per month with no contract, so the fuel savings typically pay for compliance several times over.
What MPG should a small fleet target?
A well-maintained sleeper tractor running 62–65 mph with low idle averages 6.5–7.5 MPG. Every 0.5 MPG gained on 9,000 miles per month is about 100 gallons, or roughly $390 per truck per month at $3.90 diesel.
Is IFTA affected by fuel purchases?
Yes. Where you buy fuel changes your IFTA balance, not just your pump price. Log every gallon by jurisdiction so cheap out-of-state fuel does not create a surprise IFTA bill.
Keep reading
- Best fuel cards for truckers →
AtoB, Comdata, TCS and WEX compared for small fleets.
- Cost per mile calculator →
See your true CPM and break-even rate per mile.
- Best fuel cards for owner-operators →
Which cards actually discount at the pumps you use.
- IFTA reporting made simple →
Keep fuel purchases and jurisdiction miles straight.
- ELD pricing compared →
What the major providers charge versus $15/truck.