Fuel Cost Calculator

Calculate fuel costs for any trip

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About Fuel Cost Calculator

A fuel cost calculator that estimates trip fuel costs from distance, vehicle fuel efficiency (MPG or L/100km), and current fuel price. Shows fuel needed, total cost, cost per mile/km, and round-trip estimates. Supports both metric (km, L/100km) and imperial (miles, MPG) units. Essential for road trip planning, commute cost estimation, and comparing vehicle operating costs.

Fuel Cost Calculator Features

  • Trip cost
  • Round-trip
  • MPG & L/100km
  • Cost per mile
  • Metric/imperial
Knowing your fuel costs helps budget for road trips, compare commute expenses, and evaluate vehicle efficiency. The formula is simple: Fuel needed = Distance / MPG. Cost = Fuel × Price per gallon. But comparing across MPG, L/100km, and different fuel prices requires careful conversion.

How to Use

Enter trip details:

  • Distance: One-way trip distance
  • Fuel efficiency: In MPG or L/100km
  • Fuel price: Per gallon or per liter

The Formula

Imperial: Gallons = Distance (miles) / MPG. Cost = Gallons × Price. Metric: Liters = Distance (km) × L/100km / 100. Cost = Liters × Price.

Fuel Saving Tips

  • Maintain steady speeds (55-65 mph is optimal)
  • Keep tires properly inflated (+3% efficiency)
  • Remove excess weight and roof racks
  • Use cruise control on highways
  • Plan routes to avoid stop-and-go traffic

Step-by-Step Instructions

  1. 1Enter the trip distance.
  2. 2Select metric or imperial units.
  3. 3Enter vehicle fuel efficiency.
  4. 4Enter current fuel price.
  5. 5View cost estimates and round-trip totals.

Fuel Cost Calculator — Frequently Asked Questions

How do I convert MPG to L/100km?+

L/100km = 235.215 / MPG. For example, 30 MPG = 235.215 / 30 = 7.84 L/100km. Lower L/100km is more efficient (opposite of MPG).

What's the average fuel efficiency?+

US passenger car average: ~28 MPG. SUVs/trucks: ~20-22 MPG. Hybrids: ~45-55 MPG. EVs: equivalent 100-130 MPGe.

How much does it cost to drive 1,000 miles?+

At 30 MPG and $3.50/gallon: 1000 / 30 = 33.3 gallons × $3.50 = about $116.67. At 20 MPG: $175.

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