Enter distance, fuel efficiency and price per liter or gallon to calculate total fuel used and total cost — split it between passengers if you're carpooling.
To calculate fuel cost, convert your fuel efficiency to liters per 100 km, multiply by the distance to get total fuel used, then multiply by the price per liter. Example: at 8 L/100km over 500 km you use 40 liters, which costs $60.00 at $1.50 per liter.
Convert your vehicle's fuel efficiency to liters per 100 km, multiply that by the distance in km to get the total liters needed, then multiply by the price per liter. Example: a 500 km trip at 8 L/100km uses 40 liters, which costs $60.00 at $1.50 per liter.
33.3 liters — convert to L/100km (100 ÷ 12 = 8.33), then multiply by distance ÷ 100 (8.33 × 4 = 33.3 L).
Divide 100 by the km/L figure — 12 km/L becomes 100 ÷ 12 = 8.33 L/100km.
Divide 235.21 by the MPG (US) figure — 30 MPG (US) is about 235.21 ÷ 30 = 7.84 L/100km.
Double the one-way distance before multiplying by fuel efficiency and price — a 250 km one-way trip becomes a 500 km round trip, so double the one-way fuel cost.
L/100km tells you how many liters your car burns per 100 km — lower is better. km/L tells you how many km you travel per liter — higher is better. The two are inverses: km/L = 100 / (L/100km).
15.00 per person — the trip uses 40 liters (60.00 total), divided by 4 passengers.
No — it only estimates fuel cost from distance, efficiency, and fuel price; tolls, parking, insurance, maintenance, and depreciation are not included.
UK gallons are larger than US gallons, so MPG (UK) uses a different conversion constant (282.48 vs 235.21) and is not directly comparable to MPG (US) without converting first.
| Distance | Efficiency | Price | Total cost |
|---|---|---|---|
| 500 km | 8 L/100km | 1.50 / liter | 60.00 |
| 300 mi | 30 MPG (US) | 3.50 / US gallon | 35.00 |
| 100 km | 7.84 L/100km (~30 MPG US) | 1.50 / liter | 11.76 |
| 200 km | 6 L/100km (~16.7 km/L) | 1.80 / liter | 21.60 |
| 500 km, split 4 ways | 8 L/100km | 1.50 / liter | 15.00 per person |
L/100km tells you how many liters your car burns to travel 100 kilometers — a lower number means better efficiency. km/L tells you how many kilometers you travel per liter — a higher number means better efficiency. The two are inverses of each other: km/L = 100 / (L/100km).
Divide 235.21 by the MPG (US) figure. For example, 30 MPG (US) is roughly 235.21 / 30 = 7.84 L/100km. UK gallons are larger than US gallons, so MPG (UK) uses a different constant (282.48) and is not directly comparable to MPG (US) without converting first.
If you're splitting a trip's fuel cost with other people — a carpool or a road trip — dividing the total cost by the number of passengers gives an equal per-person share, assuming everyone contributes the same amount regardless of who is driving.
No. This calculator only estimates fuel cost from distance, efficiency and fuel price. It does not include tolls, parking, insurance, maintenance or depreciation, which can add significantly to the real cost of a trip.
This calculator assumes constant fuel efficiency for the whole trip. Real-world consumption varies with speed, traffic, terrain, cargo load and driving style, so actual fuel use and cost may differ from the estimate.
Last updated: 2026-08-17