How to find estimate how long a transaction will be approved? How does the site calculate this?
I'm guessing that the site takes the number of unconfirmed transactions, hashing power of the collective miners, the fee of the transaction, plus a few other factors, and plugs them all into a rough equation.
Cool tool. It's currently estimating one of my unconfirmed transactions to be ~3d left until confirmation, which sounds about right with the delays going on currently.