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Fuel Consumption Calculator
Track MPG, L/100 km, km per liter, and the actual fuel cost for your next drive. Includes simple formulas, side-by-side comparisons, real-world use cases, and a few quick FAQ answers for tricky conversions.
1) Log your trip data
Turn your odometer + pump info into clean metrics.Hint: record your fill-up right after you log the odometer—weapons-grade accuracy beats memorized guesses.
No calculations yet.
Fuel formulas
Bookmark this for quick sanity checks.MPG = Distance (miles) ÷ Fuel (gallons)
L/100km = (Fuel liters ÷ Distance kilometers) × 100
KM per liter = Distance kilometers ÷ Fuel liters
Cost per trip = Fuel amount × price per unit (match the units).
Pro tip: If your car’s EPA MPG is 30 and you’re seeing 26, you’re losing ~14% efficiency—check tire pressure and idling time.
Reference speeds & efficiency
Use these anchors when you judge a product.| Typical vehicle | EPA MPG | L/100 km |
|---|---|---|
| Efficient hybrid | 50 | 4.7 |
| Crossover SUV | 27 | 8.7 |
| Full-size truck | 19 | 12.9 |
| Electric (equivalent) | — | — |
Use these anchors before selling a product: you can promise the numbers, not fantasies.
Real-world trips
- San Diego to LA (~120 miles): 4.5 gallons, 26 mpg, ~$20 at $4.45/gal.
- Downtown commute (30 min, 35 miles): 1.7 gallons, 21 mpg, about $7 per day.
- Cross-country (2,400 miles): average 29 mpg, expect $360 in fuel at $4/gal.
Tracking actual trips helps you explain ROI to customers ("This sedan saved me $80 vs. a truck over 1,200 miles").
FAQ
Why track cost per trip?
It forces you to compare apples-to-apples, especially when gas prices swing daily.
Is MPG better than L/100km?
Depends on the audience. Use MPG for US consumers, L/100km for EU/Asia; the calculator shows both.
Should I include idle time?
Yes—idle shots tank your MPG. Log full trip fuel, not just highway miles.
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