Fuel Expense & Budget Engine
Fuel Cost Calculator
Calculate how much fuel will cost for any commute, road trip, or annual driving budget. Enter trip distance, vehicle fuel economy (MPG), and current gas price to calculate total expenses and cost per mile.
Trip & Commute Fuel Cost Calculator
Formula: Cost = (Distance ÷ MPG) × Fuel Price Per Gallon
MPG
Average US vehicle gets 25–30 MPG.
$/ gallon
Estimated Total Fuel Cost
$56.25
Requires approximately 16.07 gallons (60.84 L).
Cost Per Mile
$0.13 / mi
Cost Per Kilometer
$0.08 / km
Annual Driving Projection (15,000 miles/yr):
Monthly: $156.25Annual: $1,875.00
1. Gallons Needed:
Fuel Needed = Distance ÷ MPG
2. Total Trip Cost:
Total Cost = Gallons Needed × Price/Gallon
Concrete 450-Mile Road Trip Example:
• Distance: 450 miles in a car getting 28 MPG with gas at $3.50/gallon.
• Gallons required:
450 ÷ 28 = 16.07 gallons.• Total cost:
16.07 × $3.50 = $56.25.• Cost per mile:
$3.50 ÷ 28 = $0.125 per mile ($12.50 per 100 miles).Common Fuel Cost Calculation Errors
- Using city MPG for highway road trips: Vehicles often achieve 20% to 30% higher MPG during sustained 65 mph highway cruising compared to stop-and-go city commutes.
- Ignoring return trips: Remember to double your distance if planning a round-trip road trip.
- Neglecting speed impact on fuel economy: Driving at 75 mph consumes approximately 15% to 20% more fuel than driving at 65 mph due to aerodynamic drag squaring with velocity.
Frequently Asked Questions
In a vehicle averaging 30 MPG with gas priced at $3.50 per gallon, a 1,000-mile drive requires 33.33 gallons and costs $116.67 ($0.117 per mile). In a 20 MPG vehicle, the same trip requires 50 gallons and costs $175.00.
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