Motorcycle vs Driving: $82.00 Bike vs $520.00 Car Month

What does driving costing $438.00 more mean?

It means that on the defaults — 20 days, 30 miles a day, driving at $0.70 a mile plus $5.00 parking, and a motorcycle at 50 mpg, $3.50 a gallon and $2.00 parking — driving costs 20 × (30 × $0.70 + $5.00), which is $520.00 a month, while the motorcycle costs 600 miles ÷ 50 mpg × $3.50, which is $42.00 of fuel, plus 20 × $2.00, which is $40.00 of parking, for $82.00 in total, so driving is $438.00 dearer over the month, or $21.90 a day. The break-even motorcycle parking of $23.90 a day is the whole story in miniature — it is the daily driving cost minus the daily fuel cost, and any motorcycle parking below it keeps the bike cheaper while any parking above it makes driving cheaper, so the whole monthly decision hangs on whether bike parking stays below $23.90 a day. The part people get wrong is comparing the motorcycle's fuel against the car's fuel alone: the car's fuel for 30 miles might be only a few dollars, but the all-in driving cost counts wear, servicing and depreciation too, and those are the costs that open the gap to $21.90 a day.

Three things to check before you trust the number

Is the motorcycle really doing 50 mpg? Fuel economy is the swing input on the motorcycle side: the 60-mpg branch shows motorcycle fuel of $35.00 and a $75.00 total, so driving is $445.00 dearer, while the 40-mpg branch shows fuel of $52.50 and a $92.50 total, so driving is $427.50 dearer — 10 mpg either way moves the month by $7.00 to $10.50. Use your bike's real figure, measured over a few tanks, not the brochure figure, and remember that short trips, cold starts and fast highway miles all pull the real number down.

Is the drive really 30 miles a day? Miles are the swing input on both sides: the 20-mile branch shows driving at $380.00 and the motorcycle at $68.00, so driving is $312.00 dearer, while a longer commute moves both sides — driving by $0.70 a mile per day and the motorcycle by only $0.07 a mile per day at 50 mpg and $3.50 a gallon. Measure the road distance for the route you would actually ride or drive, and count both directions if the 30 miles is one way.

What is missing from both sides? This page compares money only, and both sides have extras: the motorcycle runs on a different schedule, needs weather gear and carries little, while the car carries everything, keeps you dry and is usable on days the bike is not. Insurance, servicing and tyres for the bike, tolls on the driving route, and a monthly parking pass instead of daily parking all sit outside the two totals — add bike insurance to the parking line if you want it counted, and use your discounted fare or pass price where one applies. If you would keep the car anyway for other trips, the mileage rate overstates the driving cost — only the costs you would actually avoid count toward the decision.

Worked example

On the defaults: 20 days, 30 miles a day, $0.70 driving cost per mile, $5.00 driving parking, 50 mpg, $3.50 a gallon, $2.00 motorcycle parking.

1. Monthly driving cost: 20 × (30 × $0.70 + $5.00) is 20 × $26.00, which is $520.00.
2. Monthly motorcycle fuel: 600 miles ÷ 50 mpg is 12 gallons, and 12 × $3.50 is $42.00.
3. Monthly motorcycle cost: $42.00 + 20 × $2.00 is $42.00 + $40.00, which is $82.00.
4. Difference: $520.00 − $82.00 is $438.00, so driving costs $438.00 more.
5. Break-even motorcycle parking: $26.00 − $2.10 is $23.90 a day — at $23.90 parking the two sides cost exactly the same.

And the other way: the motorcycle mpg behind $82.00 is 50 mpg, the gas price behind $82.00 is $3.50 a gallon, and the motorcycle parking behind $82.00 is $2.00 a day.

Every branch, checked

• 60 mpg, same days, miles, driving costs, gas and parking: 60 mpg, same days, miles, driving costs, gas and parking: Driving $520.00 vs motorcycle $75.00 — driving $445.00 more.
• 40 mpg, same days, miles, driving costs, gas and parking: 40 mpg, same days, miles, driving costs, gas and parking: Driving $520.00 vs motorcycle $92.50 — driving $427.50 more.
• $0 motorcycle parking, same days, miles, driving costs, mpg and gas: $0 motorcycle parking, same days, miles, driving costs, mpg and gas: Driving $520.00 vs motorcycle $42.00 — driving $478.00 more.
• 10 days, same miles, driving costs, mpg, gas and parking: 10 days, same miles, driving costs, mpg, gas and parking: Driving $260.00 vs motorcycle $41.00 — driving $219.00 more.
• 20 miles per day, same days, driving costs, mpg, gas and parking: 20 miles per day, same days, driving costs, mpg, gas and parking: Driving $380.00 vs motorcycle $68.00 — driving $312.00 more.
• $5.00 motorcycle parking, same days, miles, driving costs, mpg and gas: $5.00 motorcycle parking, same days, miles, driving costs, mpg and gas: Driving $520.00 vs motorcycle $142.00 — driving $378.00 more.

The reverses, worked backwards

• Motorcycle mpg behind $82.00: 50 mpg — at 50 mpg the figures are Driving $520.00 vs motorcycle $82.00 — driving $438.00 more.; at the lower neighbor the figures are Driving $520.00 vs motorcycle $92.50 — driving $427.50 more.; at the upper neighbor the figures are Driving $520.00 vs motorcycle $75.00 — driving $445.00 more..
• Gas price behind $82.00: $3.50 per gallon — at $3.50 per gallon the figures are Driving $520.00 vs motorcycle $82.00 — driving $438.00 more.; at the lower neighbor the figures are Driving $520.00 vs motorcycle $76.00 — driving $444.00 more.; at the upper neighbor the figures are Driving $520.00 vs motorcycle $88.00 — driving $432.00 more..
• Motorcycle parking behind $82.00: $2.00 parking — at $2.00 parking the figures are Driving $520.00 vs motorcycle $82.00 — driving $438.00 more.; at the lower neighbor the figures are Driving $520.00 vs motorcycle $42.00 — driving $478.00 more.; at the upper neighbor the figures are Driving $520.00 vs motorcycle $122.00 — driving $398.00 more..

What the defaults assume

The defaults are 20 days, 30 miles a day, a $0.70 driving cost per mile, $5.00 driving parking, 50 mpg, $3.50 a gallon and $2.00 motorcycle parking, so the headline is a standard working month where the bike wins by a wide margin. The model is two multiplications on a monthly basis: days times daily driving cost for driving, and fuel plus parking for the motorcycle, with the break-even parking equal to the daily driving cost minus the daily fuel cost. The mpg reverse is checked at 10 mpg either side, because 10 mpg on 600 miles moves the fuel by $7.00 to $10.50; the gas reverse is checked at $0.50 either side, because $0.50 on 12 gallons is $6.00; the parking reverse is checked at $2.00 either side, because $2.00 over 20 days is $40.00. The model does not include time, weather, bike insurance and servicing, or car costs you would pay anyway — add those to the parking lines.

Output · formula · meaning

Who uses this

• A commuter choosing between a motorcycle and driving — $82.00 by motorcycle against $520.00 driving over 20 days, with the $23.90 break-even parking as the decision line.
• Someone with a fuel-efficient bike — the 60-mpg branch shows fuel of $35.00 and a $75.00 total, so driving is $445.00 dearer.
• A rider checking a parking quote — the reverses give the mpg, gas price or parking behind any quoted monthly cost.
• Anyone with free motorcycle parking — the $0-parking branch shows the motorcycle at $42.00, so driving is $478.00 dearer.

Accuracy & limitations

Figures are the model’s own arithmetic on the numbers you type, computed from unrounded values and displayed rounded HALF_UP to 2dp, on a monthly basis. The main limitation is what is left out, not the arithmetic: weather, carrying capacity, bike insurance and servicing, and car costs you would pay anyway all move the real comparison, and the $0.70 driving rate is an all-in average, not your exact car. This page is a calculation tool, not travel advice.

Cite this calculator

Riding 20 days at 30 miles a day costs $82.00 by motorcycle — $42.00 of fuel plus $40.00 parking — against $520.00 driving, so driving costs $438.00 more. Source: Bright Side Kit, https://brightoolbox.com/motorcycle-vs-driving/, accessed 29 October 2026.

Frequently asked questions