One date, and every figure measured against it
Enter the balances, the rates, the minimums, and what you can put toward them each month. What comes back is a single month: the one your final payment falls in. Every other number on the screen is there to explain that one.
It is arithmetic, not a forecast, so it answers immediately. Change the payment and the date moves while you watch — which is the only feedback a payoff plan has ever actually needed.
The date