Carpool Savings
Calculate yearly savings from splitting a commute by carpooling.
About Carpool Savings
Carpooling divides the same driven miles and fuel bill among the people in the car, cutting each person's yearly cost. Splitting a fixed route between riders is one of the simplest ways to halve or quarter a commute fuel bill without changing the car.
Formula
Carpool Savings
Solo = round-trip miles x days / MPG x price; share = solo / riders
- riders
- People splitting the fuel cost, including the driver
Worked example
With the default values below, Carpool Savings returns Driving Alone Cost of $1,371.43. Change any input above and every figure here is recalculated in your browser.
Inputs used
- One-way commuteminimum 0 mi
- 20 mi
- Days driven per yearminimum 0
- 240
- Vehicle MPGminimum 0.1 mpg
- 28 mpg
- Fuel priceminimum 0.001 $/gal
- 4 $/gal
- People in the carminimum 1
- 2
Results
- Driving Alone Cost
- $1,371.43
- Per-Person Share
- $685.71
- Annual Savings
- $685.71
Step by step
- 1Values used
- 2Carpool Savings
- 3Driving Alone Cost= 1,371.43
- 4Per-Person Share= 685.71
- 5Annual Savings= 685.71
Assumptions and limits
- The result is derived only from the 5 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax or fees or charges into account.
- Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How is Carpool Savings calculated?
Solo = round-trip miles x days / MPG x price; share = solo / riders Carpooling divides the same driven miles and fuel bill among the people in the car, cutting each person's yearly cost.
Why does Carpool Savings matter?
Splitting a fixed route between riders is one of the simplest ways to halve or quarter a commute fuel bill without changing the car.
What values do I need to enter?
This calculator takes 5 inputs: One-way commute, Days driven per year, Vehicle MPG, Fuel price, People in the car. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.