🚗 Road Trip Cost Splitter for a 400-Mile Trip
Split petrol and toll costs fairly between passengers.
Quick answer
A 400-mile road trip costs roughly £60.61 in fuel at 45 mpg and £1.50/litre. Split between 3 people that's about £20.20 each.
- Fuel cost: £60.61
- Split 2 ways: £30.31 each
- Split 3 ways: £20.20 each
- Split 4 ways: £15.15 each
In detail: Road Trip Cost Splitter for a 400-Mile Trip
A 400-mile road trip costs roughly £60.61 in fuel at 45 mpg and £1.50/litre. Split between 3 people that's about £20.20 each. That's the core number — but the useful context is how sensitive it is to the inputs. Change any one of the assumptions by even 10–20% and the final figure can move meaningfully, which is why a calculator like this is better than a rule-of-thumb memorised from a magazine article.
Looking at the alternate scenarios below, the spread tells you how robust (or fragile) your answer is: if small changes produce big swings, plan for the pessimistic case; if it's stable across the range, you can commit more confidently.
What this tool helps with
Total fuel cost and cost per person
What you can enter
- Total distance (miles): 400
- Car MPG (Miles Per Gallon): 45
- Fuel price (pence per litre): 145
- Number of people sharing: 3
Why this page is useful
Split petrol and toll costs fairly between passengers. This page loads fast, gives a direct answer, and then expands with useful context instead of burying the result under filler.