How it's calculated
Litres used = (distance ÷ 100) × consumption × (2 if round-trip, 1 if one-way).
Total cost = litres × fuel price. The per-person cost divides the total by the number of people in the car.
Lifestyle & Everyday
Fuel & Trip Cost Calculator
Estimate the fuel cost for any road trip — metric or imperial, split by any number of people.
Calculator
Total fuel cost
$28.8016.0 L used
Total cost
$28.80
Fuel used
16.0 L
Per person
$28.80
What is L/100km?
Litres per 100 kilometres is the standard metric measure of fuel efficiency — how many litres your vehicle consumes for every 100 km driven. Lower is more efficient.
How do I switch to miles and MPG?
Toggle the unit switch to Imperial. Enter your distance in miles and consumption in miles per gallon — the calculator converts to metric internally.
Does the round-trip option double the distance?
Yes. Round-trip multiplies the one-way distance by 2 before calculating fuel use and cost.
Total cost: $28.80
Show data table
| Distance | Total cost |
|---|---|
| 0 | $0.00 |
| 8 | $1.20 |
| 17 | $2.40 |
| 25 | $3.60 |
| 33 | $4.80 |
| 42 | $6.00 |
| 50 | $7.20 |
| 58 | $8.40 |
| 67 | $9.60 |
| 75 | $10.80 |
| 83 | $12.00 |
| 92 | $13.20 |
| 100 | $14.40 |
| 108 | $15.60 |
| 117 | $16.80 |
| 125 | $18.00 |
| 133 | $19.20 |
| 142 | $20.40 |
| 150 | $21.60 |
| 158 | $22.80 |
| 167 | $24.00 |
| 175 | $25.20 |
| 183 | $26.40 |
| 192 | $27.60 |
| 200 | $28.80 |
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 line chart traces how total cost rises as distance increases — the x-axis is distance in your chosen units and the y-axis is the running fuel cost. A data table under the chart lists the cost at each sampled distance point so you can read off any milestone. For round trips the chart already reflects the doubled distance.
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 does the chart start at zero cost?
The chart plots cost as a function of distance from 0 to your entered distance. A zero-distance trip uses no fuel, so the line starts at the origin and rises linearly — the slope reflects your vehicle's efficiency and the fuel price.
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.
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.
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