MTG Mana Curve Calculator

Analyze your Magic: The Gathering deck's mana curve, calculate average converted mana cost (CMC), and get land count recommendations based on your curve.

CMC 0 (Zero-cost spells/lands count):

CMC 1 (One-drops count):

CMC 2 (Two-drops count):

CMC 3 (Three-drops count):

CMC 4 (Four-drops count):

CMC 5 (Five-drops count):

CMC 6+ (Six or more drops count):

Average CMC of 6+ spells (if any):

Deck Size (cards total including lands):

Format:

Enter your spell counts above and click Calculate.

Formulas Used

Average CMC:

avgCMC = Σ(CMC_i × count_i) / totalSpells

Where CMC_i is the mana value for each slot (0, 1, 2, 3, 4, 5, and user-defined average for 6+).

Land Recommendation (Frank Karsten, 2022):

Lands₆₀ = 19.59 + 1.90 × avgCMC

Lands_scaled = Lands₆₀ × (deckSize / 60), rounded to nearest integer.

Clamped to format-appropriate ranges: Limited 14–20, 60-card 18–28, Commander 33–45.

Opening Hand Land Probability (Hypergeometric Distribution):

P(X = k) = C(K, k) × C(N−K, n−k) / C(N, n)

Where N = deck size, K = land count, n = 7 (opening hand size), k = number of lands drawn.

P(at least 1 land) = 1 − P(X = 0)

P(ideal 2–3 lands) = P(X = 2) + P(X = 3)

Assumptions & References

Land recommendation formula derived from Frank Karsten's 2022 article on Channel Fireball: "How Many Lands Do You Need in Your Deck?"

MTG Mana Curve Calculator

Formulas Used

Assumptions & References

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