These five calculators cover the questions an experienced MTG player asks between games: is my curve safe? should I keep this opener? am I actually building a 99 or a 112? Every tool runs in your browser, so paste a deck list freely — it never leaves your device.
Paste a deck list (one card per line, e.g. 4 Lightning Bolt) and the tool computes your converted mana cost distribution, gives a real visual histogram, and assigns a curve-quality score from 0–100. Unlike generic histogram tools, we factor in average mana value, drop-off between adjacent slots, and the "spike" risk if your top end is too heavy.
A common rookie question: "do I really need 60 cards in Standard?" — yes, but why? This solver takes your core playset counts and the expected number of games, then computes the smallest deck size where the probability of drawing one of your key cards by turn N still clears a target threshold. The answer is usually 60, but for singleton formats it can be lower.
We don't just shuffle 7 random cards. This tool draws N virtual opening hands from your deck, applies the current mulligan rule you select (Vancouver, London, Paris), and rates each hand with the actual keep / mulligan verdict you'd give at the table: lands, color-sources for spells, and curve fit. There's no auto-pilot — you see the proposed decision and decide.
Run 1,000+ hands in seconds and look at the distribution of "keepable" percentages across the deck — a much better deck-health indicator than a single sample hand.
Counts mana pips (W/U/B/R/G) and on-color sources (lands that can produce them). Flags decks where the dominant color lacks enough sources (≥ 8 sources for an off-color splash is a common failure mode), and warns when a splash is so deep that you really need 4 fetch lands, not 2.
Four players, twenty-one commander hits each, poison, commander tax, emblems, one-tap undo. Built for phones so the player across the table can read it. No logins, no auto-rollback. State lives in your browser; we never see it.
A deck of 20 two-drops and 40 lands drops everything on curve but can't close games. The score penalizes flatness at CMC 2 because real games need a top end. The exception: hyper-aggro decks in Modern/Legacy can safely ignore this.
Use London for competitive and most casual play (post-2019). Paris is only relevant for very casual tables. The simulator implements both because the answer can change by 4–6 percentage points for low-color decks.
CMC is a static number; we parse it from your input. Pulling Scryfall for every card would slow the tool and send your deck to a third party — defeating the privacy promise.
Auto-detection would need camera + card-recognition, which is a privacy and battery hazard. Clicking is faster than that and works offline.
The MTG page covers the five questions that come up between games: is my curve safe, how small can my deck be, can I keep this hand, does my colour base hold up, and where does everyone stand on life totals. Each answer here is a calculator with a specific input contract, and two of them deliberately trade precision for speed. This usage guide walks through every tool step-by-step, explains what each output actually measures, and lists the common mistakes that turn a correct deck into a misleading number. It also sets out the limits of the page, so you know exactly when to check the official format policy instead of the tool.
① Mana Curve Analyzer — reading the score and its notes
② Minimum Deck Size Solver — the number behind the number
③ Opening Hand Simulator — what it simulates, and what it does not
④ Colour Identity and Pip Analyzer — where phantom pips come from
Work from the deck outwards. Paste the list into the curve analyzer and fix the notes it prints; use the deck-size solver to justify how many copies of your key card you can afford; check the colour analyzer for a splash that your land base cannot pay for; then run a few thousand simulated hands to see whether the deck keeps what it should. Keep the commander damage tracker open separately during the game — it tracks life, poison and per-source commander damage with a single-tap undo, and it deliberately does not model emblems, commander tax or copy effects.
Because the tool never contacts a card database — that would mean sending your deck list to a third party, which breaks the privacy promise of the page. It uses a small built-in table for common cards, then a trailing-number rule, and only then a rough fallback based on the length of the name. That fallback is the part to watch: for an unfamiliar or custom card the price can be off by a mana value or more, which is enough to move a histogram bucket. If a deck uses many such cards, price them by hand first.
Four account for most broken results. Missing copy counts, since a bare name means one card. Splitting one card across two lines, which creates two entries instead of one. Leaving the sideboard in the paste, which inflates the card total and the average. And including the commander card when you want a Constructed reading of the curve, since every line you paste is scored and counted.
This page does not read the current banlist, the format rotation, card legality or the tournament policy, and it is not a card database, so always confirm the format and card legality with the official publisher and tournament organiser before entering a sanctioned event. The maths also carries modelling limits: the deck-size solver ignores mulligans and card selection, the hand simulator uses a generic deck, and the curve score is a heuristic built on five rules rather than a proven model. Nothing here guarantees a result at the table.
Scope and limits: every tool runs locally in your browser, no deck list is uploaded, and no state is saved between visits unless you copy it yourself. Scores, keep-rates and probability estimates are informational and assume standard rules and a generic deck where noted. Card lists, product contents, prices and legality differ by product and by region and change with every release, so verify against the official publisher and the current format policy before you build, trade or compete.