Fuel Cost Calculator
Unit System
Trip Details
Lower is better (e.g., 5-10 L/100km)
Quick Examples
• 100 km at 8 L/100km, $1.50/L = $12.00
• 500 km at 6 L/100km, $1.60/L = $48.00
• 250 km at 10 L/100km, $1.40/L = $35.00
Enter trip details to calculate fuel cost
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About Fuel Cost Calculator
Calculate fuel cost for any trip. Supports metric and imperial units. Free online tool.
How to Use
Step 1
Select your unit system: Metric (km, L/100km) or Imperial (miles, MPG)
Step 2
Enter the distance you plan to travel
Step 3
Enter your vehicle's fuel efficiency (L/100km or MPG)
Step 4
Enter the current fuel price per liter or gallon
Step 5
Click 'Calculate' to see your trip cost
Step 6
View total cost, fuel needed, and cost per distance
Step 7
Check the round trip estimate for return journey cost
Step 8
Use the breakdown to understand your fuel expenses
Features & Benefits
- ✅Calculate fuel consumption and trip cost instantly
- ✅Support for both metric and imperial units
- ✅Metric: kilometers, liters, L/100km
- ✅Imperial: miles, gallons, MPG
- ✅Easy unit system toggle with one click
- ✅View total trip cost in your currency
- ✅See exact fuel needed for your journey
- ✅Calculate cost per distance (per km or per mile)
- ✅Round trip estimate with doubled calculations
- ✅Detailed trip breakdown with color coding
- ✅Large total cost display for easy viewing
- ✅Quick examples for common trip scenarios
- ✅Input validation to prevent errors
- ✅Efficiency hints for each unit system
- ✅Supports decimal values (e.g., 123.5 km, 8.7 L/100km)
- ✅Clear button to reset calculator
- ✅Helpful tip about real-world variations
- ✅100% browser-based - data never sent to server
- ✅100% free - no limits, no signup required
FAQs
How is fuel consumption calculated?
For metric (L/100km): Fuel needed = (distance ÷ 100) × L/100km. For example, 200 km at 8 L/100km = (200 ÷ 100) × 8 = 16 liters. For imperial (MPG): Fuel needed = distance ÷ MPG. For example, 120 miles at 30 MPG = 120 ÷ 30 = 4 gallons. Total cost = fuel needed × price per unit.
What's the difference between L/100km and MPG?
L/100km (liters per 100 kilometers) is used in metric countries and shows how many liters of fuel you need to travel 100 km. Lower is better (5-10 is efficient). MPG (miles per gallon) is used in the US and shows how many miles you can travel on 1 gallon. Higher is better (25-40 is efficient). To convert: MPG ≈ 235 ÷ L/100km.
Where can I find my vehicle's fuel efficiency?
Check your vehicle's owner's manual, the manufacturer's website, or the sticker on the driver's side door jamb. You can also calculate it yourself: fill your tank, note the odometer reading, drive normally, refill the tank, and divide distance traveled by fuel added. For metric: (fuel used ÷ distance) × 100 = L/100km. For imperial: distance ÷ fuel used = MPG.
Why is my actual fuel consumption different from the estimate?
Many factors affect real-world fuel consumption: driving style (aggressive vs. smooth), traffic conditions (stop-and-go vs. highway), weather (cold reduces efficiency), vehicle load (passengers and cargo), tire pressure, vehicle condition, terrain (hills vs. flat), and use of AC or heating. Manufacturer ratings are tested in ideal conditions. Expect 10-20% variation in real-world driving.
How can I improve my vehicle's fuel efficiency?
Tips to save fuel: maintain steady speed (use cruise control), avoid rapid acceleration and braking, keep tires properly inflated, remove unnecessary weight, reduce AC use, combine trips, avoid idling, maintain your vehicle (oil changes, air filters), close windows at highway speeds, and plan routes to avoid traffic. Driving 5-10 mph slower on highways can improve efficiency by 10-15%.
What's a good fuel efficiency for a car?
It varies by vehicle type. Compact cars: 6-8 L/100km (30-40 MPG). Sedans: 7-10 L/100km (24-34 MPG). SUVs: 9-13 L/100km (18-26 MPG). Trucks: 11-15 L/100km (16-21 MPG). Hybrids: 4-6 L/100km (40-60 MPG). Electric vehicles don't use fuel but consume 15-25 kWh/100km. Modern vehicles are generally more efficient than older models.
Should I calculate one-way or round trip cost?
Calculate one-way for single trips (e.g., moving, one-way travel). The calculator shows both one-way and round trip estimates. For commuting or return journeys, use the round trip estimate. Remember to account for potential fuel price changes if your trip spans multiple days or weeks.
How do I compare fuel costs between different vehicles?
Use this calculator for each vehicle with the same distance and fuel price. For example, Vehicle A (8 L/100km) vs. Vehicle B (6 L/100km) for 500 km at $1.50/L: A costs $60, B costs $45, saving $15 per trip. Over a year of commuting, the more efficient vehicle can save hundreds or thousands of dollars.
What if I don't know the current fuel price?
Check local gas station websites, fuel price apps (GasBuddy, Waze), or government fuel price websites. Prices vary by location, season, and market conditions. Use an average or recent price for estimates. You can always recalculate with the actual price when you fill up.
Can I use this for diesel, electric, or hybrid vehicles?
Yes for diesel (use diesel price and efficiency). For hybrids, use the combined fuel efficiency rating. For plug-in hybrids, calculate separately for electric and gas portions. For fully electric vehicles, this calculator doesn't apply—use kWh/100km and electricity cost instead. Some EVs show MPGe (miles per gallon equivalent) for comparison.
How much does fuel cost for a long road trip?
Example: 2,000 km road trip, vehicle gets 8 L/100km, fuel costs $1.50/L. Calculation: (2,000 ÷ 100) × 8 = 160 liters needed. 160 × $1.50 = $240 total. Add 10-15% buffer for detours and variations. Don't forget to budget for tolls, food, and accommodation separately.
Is it cheaper to drive or fly?
Compare total costs: Driving = fuel + tolls + parking + wear-and-tear (add ~$0.10-0.20 per km/mile for maintenance). Flying = tickets + airport parking + baggage fees + ground transportation. For 1-2 people on short trips (<500 km/300 mi), driving is usually cheaper. For longer trips or 3+ people, compare carefully. Consider time value too—flying is faster but driving offers flexibility.
Is my trip data secure?
Yes! All fuel calculations happen entirely in your browser using JavaScript. Your distance, fuel efficiency, and prices never leave your device and are not sent to any server, ensuring complete privacy and security.