Road Trip Calculator
Fuel, cost per person and time including breaks.
Work out Road Trip. Fuel, cost per person and time including breaks. Free, with no account and nothing to download.
Average including slow sections, not cruising speed.
Fuel cost
80
11.3 hours including 5 breaks · 20 gallons
Use an average speed rather than a cruising speed. A motorway journey averaging 60 mph typically involves stretches at 70 and stretches in traffic, and planning on the cruising figure consistently underestimates the day. Fuel is rarely the whole cost of driving. Depreciation, tyres, servicing and insurance add substantially per mile, and for a comparison against flying or the train the full running cost is the fair figure. Higher speeds cost more fuel than most people expect, because drag rises with the square of speed and the power to overcome it with the cube. Dropping from 75 to 65 mph often saves 10-15%.
How the Road Trip Calculator works
Enter distance, fuel economy, price and average speed for the fuel cost, the cost per person and the real journey time with breaks included. Planning on cruising speed rather than average speed is what makes journeys run late.
Also known as: gas cost calculator for a trip · trip fuel cost calculator · driving time calculator · split fuel cost calculator
Frequently asked questions
How do I calculate the fuel cost of a trip?
Divide distance by fuel economy for the fuel needed, then multiply by the price. 600 miles at 30 mpg is 20 gallons, which at £4 a gallon is £80.
What average speed should I use?
Lower than your cruising speed. A motorway trip averaging 60 mph includes stretches at 70 and stretches in traffic — using the cruising figure consistently underestimates the day.
Is fuel the whole cost of driving?
No. Depreciation, tyres, servicing and insurance add substantially per mile. For comparing against flying or the train, the full running cost is the fair figure and it is often double the fuel alone.
Does driving slower really save much?
Yes, more than people expect. Drag rises with the square of speed and the power to overcome it with the cube, so dropping from 75 to 65 mph often saves 10-15% of fuel.
Put this calculator on your own site
Free to use, on any site, commercial or not. Paste this where you want it to appear. It is a plain iframe, so it works in WordPress, Squarespace, Wix, Webflow, Ghost and anything else that accepts HTML.
<iframe src="https://www.thecalclibrary.com/embed/road-trip-calculator" width="100%" height="640" style="border:1px solid #e2e8f0;border-radius:12px" loading="lazy" title="Road Trip Calculator"></iframe>
<p style="font:13px/1.5 system-ui,sans-serif;margin:6px 0 0;color:#64748b">Powered by <a href="https://www.thecalclibrary.com/road-trip-calculator" style="color:#64748b">Road Trip Calculator</a> from The Calc Library</p>The only condition is that the credit line below the frame stays in place. That one line is what pays for the tool being free — it is how anyone else finds it.