A-2-3-4-5 is the wheel — best lo AND a straight for hi!
Stud 8 is a 7-card stud hi-lo split game. Qualify for lo with 5 unpaired cards all 8 or lower (ace plays low).
Straights and flushes don't count against your lo hand. Scoop the pot by winning both halves.
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Equity calculator
Monte Carlo equity — hero vs 1 or 2 opponents, dead-card-aware.
Hero
Opponent 1 up-cards
Opponent 2 up-cards (optional)
Hand rank
Show the hi and lo rank for any 5–7 card hand. Updates as you type.
Study spots
Drill core Stud 8 decisions. Pick your action, then reveal the answer.
Score: 0/0
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About ER-Poker — Stud Eight or Better
ER-Poker is a portfolio of equity calculators for underserved poker variants. This page runs the full Stud 8 engine in your browser using Pyodide — no server round-trips, no installs.
Stud Eight or Better is a 7-card stud hi-lo split game. To qualify for the lo half of the pot, you need 5 unpaired cards all ranked 8 or lower (ace plays low). Straights and flushes don't count against your lo. Scoop the pot by winning both the hi and lo halves.
The equity calculator uses Monte Carlo simulation with dead-card awareness — opponent up-cards are removed from the deck before random cards are drawn.