Category
Travel
Mileage + Fuel Cost Calculator
Estimate gallons needed and fuel cost from distance, MPG, and gas price
Estimated time
1 min
Road Trip Cost Inputs
Estimate fuel and total driving cost from mileage, MPG efficiency, gas price, and extra road costs like tolls or parking.
Use your realistic trip-average miles per gallon. Lower MPG means higher fuel use.
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Formula Summary
Gallons needed = distance miles / MPG
Fuel cost = gallons needed x gas price
Total driving cost = fuel cost + tolls and parking
Cost per mile = total driving cost / distance
Cost per 100 miles = cost per mile x 100
How It Works
This calculator is useful when comparing drive-versus-fly decisions or planning reimbursement for vehicle travel.
Fuel cost is the primary output, but adding tolls and parking gives a more realistic end-to-end driving estimate.
- Gallons needed = distance / MPG.
- Fuel cost = gallons needed x gas price per gallon.
- Total driving cost = fuel cost + tolls/parking.
- Cost per mile helps compare multiple route options quickly.
- Cost per 100 miles is a benchmark for route and vehicle comparisons.
Example Calculations
Regional client visit
280 miles, 30 MPG, $3.55 gas, $18 tolls/parking
9.33 gallons, $33.12 fuel, $51.12 total, $0.18/mile
For shorter trips, tolls and parking can represent a noticeable share of total cost.
Weekend road trip
640 miles, 27 MPG, $3.79 gas, $42 tolls/parking
23.70 gallons, $89.82 fuel, $131.82 total, $0.21/mile
Mid-size road trips are mostly fuel-driven unless urban parking is expensive.
Long-distance drive
1,250 miles, 22 MPG, $4.10 gas, $65 tolls/parking
56.82 gallons, $232.95 fuel, $297.95 total, $0.24/mile
Lower MPG vehicles make long drives much more sensitive to fuel price swings.
Frequently Asked Questions
Is MPG highway, city, or combined?
Use your realistic trip-average MPG. For mixed driving, combined MPG is usually the best estimate.
Should I include maintenance and depreciation?
This calculator focuses on trip cash cost (fuel + extras). For full ownership cost, add maintenance and depreciation separately.
Can I estimate a round trip?
Yes. Enter total round-trip miles in the distance field to get one combined estimate.
Why use cost per 100 miles?
It gives a quick normalized benchmark so you can compare routes, gas prices, or vehicles consistently.
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