How to use it
Each range takes the usual notation: QQ+ for queens or better, A5s-A2s for the small suited aces, KQo for offsuit king-queen. Click a range's field, then drag across the grid to add or remove hands. The count under the field shows its and its share of all 1,326 starting hands.
The calculator deals one hand from each range, skipping any deal where two ranges need the same card, and runs out the board. Small jobs are counted exactly; before the flop it samples 100,000 deals with a fixed seed, so a shared link gives the same answer.
A worked example
The page opens on a published Equilab case: a pair of eights against a typical opening range of 55+, A2s+, KJs+, QJs, AJo+ and KQo. The eights hold about 51%. They are behind every bigger pair but ahead of every unpaired hand, and the range holds far more unpaired hands. Add a flop of K-7-2 and see how the share moves.
Range against range or hand against hand
Thinking in ranges is how players and solvers decide: you rarely know the other hand, but you can say which hands it could be. For known cards on each side, use the poker odds calculator, and for a single preflop matchup with its suit variations, the matchup pages.