Fuel Cost Calculator

A fuel cost calculator converts a trip distance, a vehicle's fuel efficiency, and the local fuel price into a breakdown of how much fuel the trip needs and what it costs. All numeric fields accept decimals, fractions (3/4), and mixed numbers (5 1/2).

• Trip distance is entered in miles or kilometers.
• Fuel efficiency can be expressed as Miles per Gallon (MPG), Kilometers per Liter (km/L), or Liters per 100 km (L/100km), whichever matches how a vehicle's rating is published.
• Fuel price is entered per gallon or per liter, matching the local pump price.
• When the distance unit and the efficiency or price unit differ, for example miles paired with a price per liter, conversion happens automatically so the result stays accurate.
• Number of Trips, set in Settings, multiplies both fuel needed and cost by that factor. A round trip counts as 2, and any number can plan a week of commutes or a repeated route.
• A step-by-step view, also in Settings, shows the full derivation with the entered values substituted into each formula.
• Results report total fuel needed, total trip cost, and cost per mile or kilometer.

The core formula for MPG-based efficiency is: Fuel Needed = Distance / MPG. For km/L: Fuel Needed = Distance / km per L. For L/100km: Fuel Needed = Distance x (L/100km) / 100. Total Cost = Fuel Needed x Price per Unit.

A 30-mile one-way trip at 25 MPG needs 30 / 25 = 1.2 gallons of fuel. At $3.50 a gallon, that is 1.2 x 3.50 = $4.20 for the trip, or 4.20 / 30 = $0.14 per mile.

Fuel cost estimation applies to a wide range of personal, commercial, and planning scenarios. Below are practical examples showing how different users benefit from accurate per-trip fuel calculations.

• Daily Commute Budgeting: Enter a 30-mile one-way commute at 25 MPG and $3.50 per gallon, then set trips to 10 for a five-day work week. Compare the weekly fuel expense against public transit or carpool alternatives.
• Road Trip Planning: Map a 1,200-mile cross-country drive, input the vehicle rating of 32 MPG, and check current gas prices along the route. Split the total cost among passengers to determine each person's share.
• Fleet Management: A delivery company entering 150 km daily routes at 8 L/100km and $1.45 per liter can multiply by 20 working days to forecast monthly fuel budgets across multiple vehicles.
• Vehicle Comparison: Run two calculations side by side for a 35 MPG sedan and a 22 MPG SUV over the same 500-mile trip. The cost difference reveals the long-term savings of choosing a more efficient vehicle.
• Ride-Share Cost Recovery: Drivers can calculate exact fuel cost per trip and set a per-rider fare that covers fuel plus wear. Entering the round-trip distance with trips set to 1 gives the baseline expense.
• International Travel: Switch to kilometers, km/L or L/100km, and price per liter to plan driving costs in countries using the metric system. Convert results to local currency manually for a complete travel budget.
• Environmental Awareness: Pair the fuel volume output with published CO2 emission factors (approximately 8.89 kg CO2 per gallon of gasoline) to estimate the carbon footprint of a planned drive.