Carpooling Calculator: Savings, Cost Split and CO2

Your details

The one-way commute or trip distance (the calculator doubles it for a round trip).
mi
Your vehicle's real-world fuel economy.
mpg
Current pump price in your area.
$/gal
Total people in the vehicle, driver included.
days
Gas-only splits just the fuel bill. Full cost adds IRS-rate wear and any parking/tolls.
Currency
Cost per person (round trip)Solid savings
$1.62

What each rider owes the driver for today's round trip

Fuel cost (round trip)$4.86
Weekly savings per person$16.19
Annual savings per person$841.90
CO2 avoided per year6,602kg
Weekly cost per person$8.10

Carpooling saves each rider about $842 per year - solid savings.

  • Each rider contributes $1.62 per round trip, versus paying 100% of that cost solo.
  • Over a full year at this commute frequency, each person saves roughly $842.
  • The group keeps 2 extra cars off the road, avoiding about 6602 kg of CO2 per year.
  • To keep splits fair when drivers rotate, track total miles each person drives and equalize at the end of each month.

Next stepSwitch to "Full cost" mode to include vehicle wear and parking in the shared bill for a more complete picture.

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