Everyday life

Carpooling Calculator

Find savings from carpooling.

Round-trip distance

Fuel economy (mpg)

Fuel price ($/gal)

Days per week

People sharing

Calculated Output

Weekly savings ($) 10.5

Yearly savings ($) 546

Formula: savings = full cost × (people−1) ÷ people

Step-by-Step Breakdown

1. Values used:

2. Round-trip distance = 30

3. Fuel economy = 25 mpg

4. Fuel price = 3.5 $/gal

5. Days per week = 5

6. People sharing = 2

8. Weekly savings = 10.5$

9. Yearly savings = 546$

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The math behind it

weekly savings = (miles ÷ mpg × price × days) ÷ people × (people − 1).

30 mi, 25 mpg, $3.50, 5 days, 2 people → save ~$10.50/wk.

More people?

More riders split the cost further.