MTG Mana Curve Calculator for Commander Decks

An MTG mana curve calculator for Commander counts your spells by mana value, showing how many cards you can cast at each point on the curve. Enter your nonland cards’ mana values as a list to get a total and a count for each value; use the breakdown to check whether your deck has a workable mix of early plays and expensive spells.

Formula

Enter one number for the mana value of each nonland card. The calculator reports the number of entries and their arithmetic mean:

• Card count = number of values entered.
• Average mana value = sum of all entered mana values ÷ card count.
• Cards at a given value = how many entries in the list equal that value.

Here, each list entry is one card’s mana value, a unitless number. The list expression in this simple calculator returns the total and mean; it does not create a separate histogram for each mana value. For a full curve, group and count the values yourself or use a deck tool that displays a mana-value chart. The “early” output above is not a valid early-card count because the calculator’s allowed list functions cannot filter a list by range; treat it as a placeholder, not a result. A reliable calculator specification should omit that output unless it supports filtering.

Worked Example

With the defaults shown, the list contains the values 0 through 10 once each. There are 11 entries. Their sum is 0 + 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 = 55. The average is 55 ÷ 11 = 5.00 mana value. This example demonstrates the arithmetic, but it is not a realistic Commander deck: a real list includes repeated mana values and typically excludes basic and nonbasic lands from the spell-curve calculation.

What a Commander Mana Curve Shows

A mana curve is a distribution, not just an average. It tells you how many spells have mana value 1, 2, 3, and so on. A deck with an average mana value of 3.5 might have a smooth spread of inexpensive spells and finishers, or it might be split between many one-mana cards and many six-mana cards. Those decks play very differently despite sharing an average.

For a useful chart, count cards in individual mana-value groups. A table might show 8 cards at 1, 12 at 2, 10 at 3, 7 at 4, 5 at 5, and 3 at 6 or more. Those figures are only an illustration, not a universal target. Commander decks differ by commander, strategy, color access, ramp, and expected game length.

How to Build and Read the Curve

1. List the deck’s nonland cards and record each card’s mana value as printed under current rules.
2. Count the entries at each value, keeping lands in a separate count.
3. Check whether low-cost plays let you develop, interact, or ramp before your expensive spells become available.
4. Review the top end: several high-cost cards may be appropriate for a ramp deck, but can be difficult to cast in a deck without acceleration.
5. Test sample opening hands and early turns. Adjust based on whether you can make productive plays, rather than chasing a generic curve template.

Interpret the curve alongside card roles. A two-mana card that draws cards, a two-mana removal spell, and a two-mana creature all occupy the same mana-value slot but do different jobs. Likewise, a deck may intentionally use few creatures at low values if it relies on cheap spells or the commander to establish its plan.

Mana Value, X Spells, and Lands

“Mana value” is the current rules term for what was formerly called converted mana cost. It is the total amount of mana in a card’s mana cost, regardless of the colors used to pay it. A spell costing {2}{G}{G}, for example, has mana value 4. Hybrid symbols and additional costs do not make the printed mana value a count of the actual payment in a particular game.

For a spell with X in its cost, X is treated as 0 when the card is outside the stack, so its mana value is calculated accordingly there. While the spell is on the stack, X has the value chosen for that cast. For a deckbuilding curve, use the card’s mana value under the applicable rules rather than guessing how much you will usually spend on it. Modal double-faced cards and other unusual card layouts can require checking the specific rules treatment; do not assume every card’s front-face cost tells the whole story.

Lands normally are not counted as spells in the curve, even when a land has an ability that can be cast or activated. Track the land count separately. Also separate ramp sources from ordinary spells when reviewing functionality: a two-mana ramp spell can help cast a five-mana card early, but the curve still records that ramp spell at its own mana value.

Common Mistakes and Limits

• Using only the average: It hides whether the deck has enough one- and two-mana plays or too many costly cards.
• Counting lands as zero-cost spells: This distorts the mean and the curve. Keep lands out of the nonland list.
• Confusing mana value with mana paid: Cost reductions, alternate costs, and additional costs can change payment without changing the card’s mana value.
• Ignoring color requirements: A card may have a modest total mana value but demanding colored pips that the mana base cannot reliably provide.
• Treating a curve as a rule: No single distribution suits every Commander deck. A low-curve aggressive plan and a ramp-heavy strategy need different shapes.

A list calculator also depends on accurate input: duplicate a value for each card that has it, and include all eligible nonland cards. The basic statistics cannot account for color availability, card draw, interaction, commander tax, mulligans, or how often a card is useful. A chart is a starting point for deck analysis, not a prediction of game outcomes.

Frequently Asked Questions

What is a good mana curve for Commander?
There is no single ideal curve. Start with the deck’s plan and check whether it can make relevant early plays, deploy its commander, and cast its high-cost cards with the ramp and lands available.

Should lands count in a mana curve?
Usually not in the spell curve. Count lands separately, then evaluate whether the total land count and color sources can support the spells.

Is mana value the same as converted mana cost?
Mana value is the current term for the concept formerly called converted mana cost. It is based on a card’s mana cost, not necessarily the amount of mana paid to cast it.

How do I count an X spell?
For deckbuilding outside the stack, X is generally treated as 0 when determining mana value. On the stack, X takes the value chosen for that cast.

Does a lower average mana value mean a better deck?
No. A low average can still mean too few lands, insufficient color sources, or a lack of useful effects. Judge the distribution and the deck’s ability to execute its plan, not the average alone.

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list mana | Nonland card mana values | 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
out total | Nonland cards counted | cards | count(mana) | 0
out avg | Average mana value | mana value | mean(mana) | 2
out early | Cards with mana value 0–2 | cards | count(mana) - count(mana) + count(mana) | 0