MTG Mana Base Calculator
Deck Configuration
Count Your Devotion (Mana Symbols)
Count the number of colored mana symbols in the casting costs of all spells in your deck.
Suggested Mana Base
*This calculator provides a mathematical ratio based on colored mana symbols (pips). In a real deck, you should replace basic lands with dual lands, fetch lands, or utility lands that match these colored source requirements.
The most common reason players lose games in Magic: The Gathering is not because of a bad strategy, but because of "mana screw" (not drawing enough lands) or "color screw" (drawing the wrong color of lands).
Our MTG Mana Base Calculator eliminates the guesswork in deckbuilding. By analyzing your devotion to each color, it calculates the mathematically optimal ratio of lands required to cast your spells on curve.
How to Build a Consistent Mana Base
A consistent mana base relies on counting "pips" (colored mana symbols). If you have a spell that costs 1 Red and 2 Colorless (3 total mana), that counts as 1 Red Pip. If a spell costs 3 Red mana, that counts as 3 Red Pips.
A deck with 20 Red Pips and 10 Green Pips clearly needs more Mountains than Forests. The calculator takes your total number of desired lands (e.g., 24) and divides them proportionally based on this pip ratio, ensuring you draw exactly what you need.
The Hypergeometric Distribution Formula
Behind the scenes, high-level MTG deckbuilding relies on hypergeometric distribution—a statistical formula that calculates the probability of drawing a specific card from a deck of a specific size.
For example, if you absolutely need one Green mana source in your opening 7-card hand, the math dictates you must include at least 14 Green sources in a 60-card deck to have an 86% probability of drawing it. Our tool provides a streamlined ratio that mimics these hypergeometric requirements for multi-color decks.
Commander (EDH) Land Requirements
Commander is a 100-card format. Because you are playing with a much larger deck, the math changes significantly.
A standard Commander deck should run exactly 37 lands. This ensures a healthy flow of mana in the early game. You can only reduce this number if you are running an excessive amount of 1-cost or 2-cost "Mana Rocks" (artifacts that tap for mana, like Sol Ring or Arcane Signet) or "Mana Dorks" (creatures that tap for mana, like Llanowar Elves).
Fetching and Dual Lands
The outputs provided by the calculator represent "Mana Sources," not necessarily basic lands.
If the calculator tells you that you need 12 Blue Sources and 12 Black Sources, you do not need to run 12 basic Islands and 12 basic Swamps (which would total 24 lands).
Instead, you would include a card like Watery Grave, which acts as a full source for both Blue and Black simultaneously. By utilizing dual lands and "Fetch Lands" (lands that search your deck for other lands), a 24-land deck can easily provide 18 Blue sources and 18 Black sources, vastly exceeding the minimum requirements.
Frequently Asked Questions
How many lands should a 60-card MTG deck have?
Most standard 60-card decks run between 23 and 25 lands. Highly aggressive decks with low curves might drop to 20, while control decks might run 27.
How many lands should a Commander (EDH) deck have?
A standard Commander deck should start with 37 lands. You can adjust this down to 35 if you run heavy mana-rocks (like Sol Ring and Arcane Signet) or mana-dorks.
Do dual lands count as one or two sources?
A dual land (like an Overgrown Tomb that taps for Black or Green) counts as a full source for both colors when evaluating your ratios.
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