A musthave application for New York City MTA public transportation users who use payperride MetroCards.nnMetroCalc lets you calculate the exact amount to add to your MetroCard so you end up with a round number of rides, while still getting the full benefit of the bonus on purchases.nnThe app can do so from any initial balance, and will list all possible solutions that give you a round number of bus, subway, express bus or PATH rides including senior fares.