How does a poker odds calculator work?

It calculates poker hand odds by simulating thousands of random outcomes (called Monte Carlo simulation) to determine how often each hand wins. The calculator deals out the remaining unknown cards thousands of times, evaluates who wins each time, and converts the results into percentages. With 10,000 simulations, the results are accurate to within ~1%.

Poker odds are the probability of winning a hand based on the cards you hold, the cards on the board, and the cards your opponent might hold. Pre-flop, pocket aces have roughly 85% equity against any single random hand. On the flop with a flush draw, you have roughly 35% chance of completing the flush by the river.

How do I calculate poker outs?

Count the number of unseen cards that would improve your hand. A flush draw has 9 outs (13 cards of your suit minus the 4 you can already see). An open-ended straight draw has 8 outs. Multiply outs by 2 for the turn percentage or by 4 for the river percentage (the Rule of 2 and 4).

Should I use a poker odds calculator during play?

In online poker, many players use odds calculators or tracking software during play — this is generally permitted in most online poker rooms. In live poker, you can't use electronic devices at the table, but knowing common odds from memory (the reference table above) is an essential skill.

What are pot odds in poker?

Pot odds are the ratio of the current pot to the cost of calling a bet. If the pot is £60 and you need to call £20, your pot odds are 25%. If your hand equity exceeds 25%, calling is mathematically profitable. If it's below 25%, folding is correct. Comparing pot odds to hand equity is the foundation of profitable poker decision-making.

Poker Odds Calculator

A free poker hand odds calculator — calculate equity, outs, and win probability for Texas Hold'em

Last updated: April 2026

Select your 2 hole cards

YOUR HAND

OPPONENT

BOARD

How to use this poker odds calculator

Select your two hole cards by clicking them in the card grid
Optionally add your opponent's cards — leave blank to calculate against a random hand
Optionally add board cards — enter the flop (3 cards), turn (4 cards), or all 5 for an exact result
Click Calculate to see your win, lose, and tie percentages

Understanding the results

Equity is your share of the pot based on probability. If you have 65% equity in a £100 pot, your "fair share" is £65. Equity changes as more cards are dealt — a hand with 60% equity pre-flop might have 90% after a favourable flop or 20% after a bad one.

Outs are the cards remaining in the deck that improve your hand. A flush draw has 9 outs. An open-ended straight draw has 8. Use the Rule of 2 and 4: multiply outs by 2 for the chance of hitting on the next card, or by 4 for the chance of hitting by the river. For a complete guide to poker strategy and hand rankings, see our poker guide.

Outs reference table

Draw	Outs	Turn %	River %
Flush draw	9	19.1%	35.0%
Open-ended straight	8	17.0%	31.5%
Two overcards	6	12.8%	24.1%
Gutshot straight	4	8.5%	16.5%
One overcard	3	6.4%	12.5%
Pocket pair to set	2	4.3%	8.4%

Pot odds vs hand odds

Use this calculator alongside pot odds to make better decisions. If the pot is £50 and you need to call £10, your pot odds are 10/(50+10) = 16.7%. If this calculator shows your equity at 35%, calling is profitable — your equity exceeds the price. If your equity is only 12%, fold. For more on how probability drives every gambling decision, see our expected value guide.

Common pre-flop matchups

Matchup	Favourite	Equity
AA vs KK	AA	81% vs 19%
AA vs AK suited	AA	87% vs 13%
KK vs AK offsuit	KK	70% vs 30%
QQ vs AK suited	QQ	54% vs 46%
AK suited vs JJ	JJ	54% vs 46%
AK suited vs 87 suited	AK	59% vs 41%
Pair vs two overcards	Pair	~55% vs ~45%
Pair vs one overcard	Pair	~70% vs ~30%
Dominated hand (AK vs AQ)	AK	74% vs 26%

Responsible gambling note

Poker is a skill game with a significant luck component. Even with a mathematical edge, short-term variance means you can lose over any given session. This calculator helps you make better decisions — but no tool eliminates the risk of losing. If poker has become a source of stress rather than enjoyment, our self-exclusion guide covers how to take a break from all UK-regulated poker sites. For a broader look at how much the UK spends on gambling across all products, see our UK gambling statistics.

Frequently asked questions

Written by

David Burke

David is a gambling industry analyst and poker player based between London, Spain, and Malta. He has spent over a decade observing the European betting and casino landscape, with particular expertise in odds, probability, game strategy, and how the bookmaking industry works. At WiseStaker, David writes guides on bet types, game rules, and the mathematics behind gambling.

Follow on X →