Range Explorer — Flopzilla-Style Range vs Flop Analyzer

What is range vs flop analysis?

Equity tells you how often a range wins at showdown. A hit distribution tells you something different and often more useful: what the range actually is on a specific flop — how many combos made a set, top pair, a flush draw, or nothing at all. This is the analysis desktop tools like Flopzilla made famous, and there has been no real way to do it free in a browser: this page enumerates every combo in your range against the exact three cards you pick and buckets each one, with combos blocked by the board removed automatically.

The reason it matters: postflop decisions are texture decisions. The same opening range is a completely different animal on A-7-2 rainbow than on 9-8-7 two-tone, and the numbers below show exactly how different.

How to use hit distributions to plan c-bets

• →Compare your range to theirs, not to the board. Run your opening range, then run their likely calling range on the same flop. Whoever holds more strong hands and fewer air combos owns the texture and gets to bet more often.
• →Almost no air means bet small, bet often. On A-7-2 rainbow a tight opener has 3.7% air and 88.1% of the range holding a pair, plus all the AA and AK-type hands the caller mostly cannot have. A small bet with nearly everything works.
• →High draw share means polarise and size up. On 9-8-7 two-tone the same range has 9.2% in live draws with no pair yet and 27.7% air. Your strong hands want protection and your draws want fold equity — the classic big-bet, lower-frequency texture.
• →Check the turn heatmap before you barrel. If most turn cards crater your top-pair-or-better share, prefer betting the flop now; if many turns improve you, checking back marginal hands costs less.

Worked example: one UTG range, two flops

Take the standard UTG open from our range library — 22 hand classes, 130 combinations — which is what this tool loads by default. These are the exact results from the engine above, not a separate calculation:

On A-7-2 rainbow the range is pair-heavy and draw-free: 88.1% of live combos hold a pair, 33.0% of them top pair, and there is not a single flush draw or open-ender in it. Only 3.7% is air. Betting small at a high frequency is near-unexploitable here.

On 9-8-7 two-tone the same range makes a pair 55.5% of the time, and 9.2% of it is a live draw with no pair yet. The overlay, which counts draws attached to made hands too, shows 4.2% flush draws and 13.4% open-enders across the whole range. Every overpair — 25.2% of it — is one card from being shown a straight. Same preflop range, opposite postflop plan: bigger bets, fewer bluffs, more caution on bad turns.

Note how much of the difference is invisible from the flop alone. 41.3% of the range is top pair or better on A-7-2 rainbow against 35.3% on 9-8-7 two-tone — a far smaller gap than the air numbers suggest, because the wet board hands that are not pairs are mostly drawing rather than dead.

What desktop Flopzilla still does better

Honest answer: this tool covers the core loop — range in, flop in, exact hit distribution out — and for that job it matches desktop output, because both are exact enumeration. But Flopzilla and Flopzilla Pro still do things we do not: percentage-weighted ranges (here a hand is in or out, never "30% in"), interactive filters that cascade into equity calculations, equity against a second range inside the same view, multi-street filtering down to river distributions, and saved range trees. If you study seriously and can spend the money, desktop is still worth it. If you want the common case — how often does this range hit this flop — free and on any device, that is what this page is for. For weighted ranges, our range builder does handle partial weights; for range vs range equity rather than hit distribution, use the range equity calculator.

Methodology & edge cases

Every combo lands in exactly one bucket, so the list sums to 100%. The classification is hole-card-centric — the same convention Flopzilla uses — and these are the edge-case rules, spelled out so you can check the numbers:

1. 1. Set vs trips. A set is a pocket pair plus a matching board card (77 on A-7-2); trips is a paired board plus one matching hole card (A7 on 7-7-2). They are separated because they play differently.
2. 2. Two pair requires both hole cards. A7 on A-7-2 is two pair. 87 on K-K-7 is not — the board pair is community property, so it counts as a weak pair. A pocket pair on a paired board (99 on K-K-7) is likewise classified by where the pocket pair sits, not as two pair.
3. 3. Board-made hands do not count for you. A2 on K-K-7 technically has a pair of kings, but every hand does, so it files under air. Straights, flushes and straight flushes must beat whatever the board makes by itself.
4. 4. Pair sub-buckets. Overpair beats every board card; top pair matches the highest board rank; middle pair matches the second rank, or is a pocket pair between the top two; weak pair covers lower board pairs; underpair sits below the whole board.
5. 5. Draws must use a hole card, and 8-out draws are grouped. A flush draw is exactly four to a flush including at least one hole card. Straight draws are counted by completing ranks: two or more ranks is an OESD or double gutter (8 outs), one rank is a gutshot (4 outs). Draw buckets only hold combos with no pair; the overlay counts draws attached to made hands separately.
6. 6. Card removal is automatic. Combos containing a board card are removed before percentages are computed, which is why the worked example above shows 109 live combos on A-7-2 rainbow rather than all 130 — 21 of them contain a board card. The turn heatmap re-removes combos per candidate card.