Gas Trip Calculator — Fuel Cost by Distance & MPG
Estimate your road trip fuel cost using distance, fuel efficiency and fuel price. Supports miles/MPG and kilometers/L/100km with currency options.
Trip Fuel Cost
Enter trip details and get fuel cost instantly
Estimated Cost
Based on your inputs
Tips
Sample Distances
How to Use the Gas Trip Calculator
Step-by-Step
- 1. Choose units: US (miles/MPG) or Metric (km/L/100km)
- 2. Enter distance: Total planned trip distance
- 3. Enter efficiency: Vehicle MPG or L/100km (or choose a preset)
- 4. Enter fuel price: Price per gallon or liter
- 5. View results: Fuel needed and estimated cost
- 6. Copy: Save the results for sharing or budgeting
Pro Tips
- Check local fuel prices before traveling and adjust price input.
- Use manufacturer specs or trip computer for more accurate efficiency.
- Add a margin (5–10%) for traffic, terrain and A/C usage.
Frequently Asked Questions
How accurate are these estimates?
Estimates depend on your inputs. Real-world efficiency varies with speed, terrain, traffic and load. Consider adding a 5–10% buffer.
What if my car shows L/100km but my trip is in miles?
Switch to Metric for L/100km input, and convert your distance to kilometers (1 mile ≈ 1.609 km) or keep US units and convert efficiency to MPG.
Can I change the currency?
Yes. Choose USD/EUR/GBP or override the symbol to your local currency.
Does the calculator include tolls and other costs?
No. This tool focuses on fuel cost. Add tolls, parking, and maintenance separately.
What is a good MPG?
Compact cars: 30–35 MPG; midsize: 25–30 MPG; SUVs: 18–25 MPG; trucks: 15–20 MPG. Values vary by model/year.
How do I plan a multi‑stop road trip?
Sum your total distance across all stops (or estimate per day) and enter the combined distance. Add a small buffer for detours and traffic.
Should I use MPG or L/100km?
Use MPG for US customary units (miles & gallons) and L/100km for metric (kilometers & liters). The calculator supports both systems.
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