This is a probability calculator for players of Magic the Gathering.
If you have 4 copies of a card in your deck, what is the chance of drawing at least one of them in your opening hand?
If you have 24 lands in your deck, what is the chance of drawing 3 lands by the 4th turn?
If you have 2 counterspells remaining in your deck, what is the chance of drawing at least one in the next 3 turns?
This app answers these questions. Its useful when determining how many cards of a given type to include in your deck. For instance, if youre building a weenie deck and want 3 1-mana creatures by turn 2, you can try different numbers and see what grants a suitably high probability of that happening. If you so desired, you could also use it during a live game to determine the chances of drawing a card after a certain number of draws.