MTG mana curve calculator

This Magic: The Gathering mana curve calculator turns the count of cards at each mana value into a single average and a clear curve summary you can share with teammates or paste into notes. Deck builders, content creators, and teachers already group main-deck spells into mana-value buckets—zero through six and a seven-plus tail—because that histogram predicts how often a hand can cast on curve, whether a midrange pile is top-heavy, and how an aggro list stays lean. You type non-negative integers for each bucket; the engine multiplies every count by its mana value (using seven for the seven-plus group), divides by total cards for a stable six-decimal average, reports the peak bucket, splits low, mid, and high bands, and returns per-bucket share percentages. Classic checks include a forty-four-spell aggro curve averaging near two-point-four and a control shell whose average climbs past three.

What average mana value and curve summary mean

Average mana value answers a weighted-mean question: if every main-deck card in your tracked pool contributes its printed mana value, what is the mean cost of a randomly drawn card from that pool? Designers use that number as a compact health check—aggressive decks often land near two to two-point-five when lands are excluded or counted carefully, midrange shells climb toward three, and ramp or control lists can sit higher when expensive finishers dominate the right side of the histogram.

This calculator does not scrape deck lists or resolve card names; you already know how many cards sit at each cost, and you enter those eight counts. Zero covers free spells and any zero-mana cards you choose to include; one through six match printed mana values; seven-plus collapses every card costing seven or more into one tail bucket, and for the weighted sum each card in that tail contributes seven so the average stays deterministic and comparable across lists that only publish a histogram.

There is no Monte Carlo mulligan model here: the math is exact arithmetic on the histogram you supply.

Where mana-curve averages fit in brew, content, and tools

Players meet average-cost questions when a draft pile feels stuck on three-drops or when a Standard brew keeps missing two-mana interaction. Content creators print curve charts next to deck techs and need a single reproducible average for the caption instead of eyeballing a bar graph. Teachers introduce weighted means with cardboard: twelve one-drops and fourteen two-drops make the algebra concrete before anyone opens a spreadsheet.

Tournament grinders compare an aggro list against a midrange mirror by lining up low-curve and high-curve card counts, not only the headline average. Pair it with probability or odds helpers when you care about opening-hand distributions, and with other hobby tools when you are assembling a small lab of free, deterministic calculators for games and study.