Gas Savings Calculator
 

Try the handy calculator in the right sidebar on the CommuteByBike.com site.

You'll enter daily miles commuted, price of gas per gallon, your car's MPG, and days you ride per week. It will then calculate daily, weekly, and yearly total savings.

Depressing.
I need to spend more per gallon, get a gas-hog or work 8 days a week.....