Deck-u-lator calculates the percentage that a card combination will occur in the first cards dealt off the top of the deck.
Step 1. Which cards do you have?
Enter the types of cards in your deck (e.g. Swamp, Fireball), one per line. On the next page you can specify how many of each card you have in your deck and how many you need for your combination.
It may be useful to include one card type called "other" that includes all the cards in the deck that are not relevant to this calculation. (Here's why.)
Sample results
Here are the chances for drawing combinations with two, three, and four cards.
These assume you have four of each card in your deck and are playing with a 60 card deck.