Poker maths, worked in the browser

The parts of poker you can actually calculate

Pot odds, outs and equity, position, and the tournament arithmetic that decides most of the pots you play — with calculators that show their working.

Most of a poker decision is judgement. A meaningful minority of it is arithmetic, and that minority is the part you can be right about every single time, for free, forever. This site covers that part.

Start with the question you face most often at a table: someone has bet, and you have a draw.

Pot you are calling into
Pot odds
Equity needed to call
Clean outs needed (one card)

What is here

  • Pot odds and required equity

    The full calculator, the bet-size reference table, and where implied odds legitimately change the answer.

  • Outs, and the rule of 2 and 4

    Exact probabilities for every out count, and the exact point at which the mental shortcut starts lying to you.

  • Position

    Why the seat you are in is worth more than the cards you hold, and the mechanism behind that claim.

  • Tournaments, cash games and ICM

    Why a tournament chip is not money, with a working three-handed ICM calculator.

  • Bankroll management

    A sizing tool, and an honest account of how long variance can hide whether you are any good.

  • The Asia-Pacific circuit

    How poker in the region is structured: the hubs, the tours, and the very uneven legal picture.

Why there is no news here

This site used to report tournament results. It does not any more, and that is deliberate. Results coverage has a shelf life measured in days, it requires someone in the room to verify it, and a page about a final table from three years ago helps nobody.

Probability does not expire. A flush draw has been nine outs and roughly a 35% chance of getting there by the river for as long as the game has had 52 cards, and it will still be that when every tour on the calendar has been renamed twice. So the material here is the durable half: the arithmetic, the mechanics, and the structural facts about how the game is organised in this region.

The one thing worth internalising first

Every call you make is a price. The pot offers you a payout; the bet is the ticket. If the payout is 3 to 1, you need to be right more than one time in four — 25% — and it does not matter in the slightest how the hand feels.

That single reframing does more for a beginner than any amount of hand-reading theory, because it converts a vague question ("should I call?") into a specific one with a checkable answer ("do I win this more than 25% of the time?"). The second question is still hard. But it is hard in a way you can get better at, which the first is not.

Work through pot odds and then outs, in that order. Between them they cover most of the money that beginners spill.