Fuel Cost Calculator
Estimate total fuel cost for a trip based on distance and MPG.
Last updated: June 13, 2026
Calculator
Results
How to Use This Calculator
- 1Enter the trip distance in miles.
- 2Enter your vehicle fuel economy in MPG.
- 3Enter the current fuel price per gallon.
- 4View total cost, gallons needed, cost per mile, and round trip cost.
Formula Explanation
Total fuel cost is calculated by dividing trip distance by MPG to get gallons needed, then multiplying by price per gallon.
Variables:
Worked Examples
500 mile trip, 28 MPG, $3.50/gal
- 1. Gallons = 500 ÷ 28 = 17.9 gal
- 2. Cost = 17.9 × $3.50 = $62.50
Why Use This Calculator
- Plan trip budgets accurately.
- Compare fuel costs between vehicles.
- Calculate cost per mile for expense reports.
- Includes round trip calculation.
Tips & Best Practices
- Check GasBuddy or similar apps for current gas prices along your route.
- Highway MPG is typically 20-30% better than city MPG.
- Factor in altitude changes — mountain driving reduces MPG significantly.
Common Mistakes to Avoid
❌ Using city MPG for a highway trip.
✅ Use your highway MPG rating for mostly highway trips, or an average for mixed driving.
❌ Not accounting for fuel price differences along the route.
✅ Gas prices vary significantly by state and region. Check prices along your route for better estimates.
Frequently Asked Questions
How do I find my actual MPG?
Does speed affect fuel economy?
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<iframe src="https://redicalc.com/embed/automotive/fuel-cost-calculator" width="100%" height="600" style="border:none;border-radius:12px;box-shadow:0 1px 3px rgba(0,0,0,0.1);" title="Fuel Cost Calculator — RediCalc.com" loading="lazy" allowtransparency="true"></iframe>Disclaimer: This calculator is provided for informational and educational purposes only. Results are estimates and should not be used as a substitute for professional advice. RediCalc.com makes no guarantees regarding the accuracy, completeness, or suitability of any calculations. Always consult a qualified professional before making financial, health, construction, or other important decisions.
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