Fuel & Trip Cost Calculator
Estimate the fuel cost for any road trip — metric or imperial, split by any number of people.
Calculator
One-way: $28.80 · Round trip: $57.60
Show data table
| Distance (km) | One-way | Round trip |
|---|---|---|
| 0 | $0.00 | $0.00 |
| 12.5 | $1.80 | $3.60 |
| 25 | $3.60 | $7.20 |
| 37.5 | $5.40 | $10.80 |
| 50 | $7.20 | $14.40 |
| 62.5 | $9.00 | $18.00 |
| 75 | $10.80 | $21.60 |
| 87.5 | $12.60 | $25.20 |
| 100 | $14.40 | $28.80 |
| 112.5 | $16.20 | $32.40 |
| 125 | $18.00 | $36.00 |
| 137.5 | $19.80 | $39.60 |
| 150 | $21.60 | $43.20 |
| 162.5 | $23.40 | $46.80 |
| 175 | $25.20 | $50.40 |
| 187.5 | $27.00 | $54.00 |
| 200 | $28.80 | $57.60 |
About this calculator
This calculator tells you exactly how much fuel a road trip will cost before you leave. Enter the one-way distance, your vehicle's fuel consumption, and the local price per litre (or per gallon in imperial mode). Add passengers to see how much each person owes, or toggle round-trip to double the distance automatically.
How to read your results
The three headline cards show litres used, total fuel cost, and cost per person. Below the cards, a bar chart compares the one-way total against the round-trip total side by side, so you can see at a glance how much the return leg adds. When you split the cost between two or more people, a per-person bar appears too. A data table under the chart lists each figure so you can read off the exact amounts.
How it's calculated
Fuel used (litres) = (distance in km ÷ 100) × L/100km × (2 for round-trip, 1 for one-way). Total cost = litres used × price per litre. Cost per person = total cost ÷ number of people. Imperial inputs (miles, MPG, price per gallon) are converted to metric before the formula runs: miles to km via ×1.609344, MPG to L/100km via 235.21 ÷ MPG, and gallons to litres via ×3.785412.
Worked example
A 500 km one-way drive at 8 L/100km with fuel priced at 1.80 per litre, split among 4 people.
The car uses 40 litres. Total cost comes to 72.00; each person pays 18.00.
Frequently asked questions
What is L/100km and how do I find my vehicle's figure?
Litres per 100 kilometres measures how many litres your car burns to travel 100 km — lower is more efficient. Most manufacturers publish this value in the owner's manual or on the fuel-economy label. Typical values range from 5 L/100km for a small efficient car up to 14 L/100km for a large SUV or truck.
How do I use miles per gallon (MPG) instead?
Switch the unit toggle to Imperial. The calculator converts your miles and MPG figures to kilometres and L/100km internally — the formula stays the same, and you never see metric numbers unless you want to.
Does round-trip simply double everything?
Yes. Selecting round-trip doubles the effective distance before computing litres and cost. The per-person split is then applied to that doubled total.
Why is the round-trip bar exactly double the one-way bar?
A round trip covers your route twice, so it burns twice the fuel and costs twice as much as the same one-way drive. The chart shows both totals side by side so you can decide whether to budget for the return leg.
Does this account for tolls, parking, or wear on the car?
No. The calculator covers fuel cost only. For a full trip budget you would add toll fees, parking charges, and a per-kilometre vehicle maintenance allowance on top of the fuel figure.
Sources
Reviewed by the YouCalc Team · Last reviewed
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