New York City MetroCard Refill Calculator
Dear Commuter:
With the new 15% discount on MetroCards, you are likely to end up with extra change on your card. Instead of throwing it out, or refilling it and not getting the 15% discount, use this calculator to figure out exactly how much to add your MetroCard to have a perfect balance.
Don't throw away those pennies (a la Superman III) to the MTA!
Have a happy commute.