{"id":239,"date":"2026-03-26T07:57:36","date_gmt":"2026-03-26T07:57:36","guid":{"rendered":"https:\/\/winneronline.net\/au\/?page_id=239"},"modified":"2026-09-30T06:09:58","modified_gmt":"2026-09-30T06:09:58","slug":"roulette-odds-probability","status":"publish","type":"page","link":"https:\/\/winneronline.net\/ca\/casino-games\/roulette\/roulette-strategy\/roulette-odds-probability\/","title":{"rendered":"Roulette Odds &amp; Probability"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">Roulette Odds and Probability: Payouts, House Edge and RTP<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Roulette probability depends on the number of pockets and the settlement rules. The examples below assume a fair wheel with equally likely pockets and independent spins. A payout ratio, winning probability and theoretical return are different quantities.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Probability Is Not the Same as Odds Against<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A conventional European wheel has 37 pockets: 1\u201336 and zero. A single chosen number therefore has a 1\/37 probability, approximately 2.70%. The odds against it are 36:1, because there are 36 losing pockets for one winning pocket. The conventional profit payout is 35:1.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For a one-unit straight-up stake, a win returns 36 units including the stake. Expected return is 36\/37, approximately 97.30%, leaving a house edge of 1\/37, approximately 2.70%. \u201cOne in 37\u201d must not be described as \u201c37 to 1\u201d odds against.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Single-Zero and Double-Zero Wheels<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A conventional American wheel adds 00, producing 38 pockets. A single-number probability becomes 1\/38, approximately 2.63%. With the same 35:1 profit payout, expected return is 36\/38, approximately 94.74%, and house edge is 2\/38, approximately 5.26%.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The single-zero return is therefore 97.30% versus 94.74%, not nearly twice as large. It is the expected loss percentage that is roughly halved. Most conventional double-zero wagers share the 5.26% edge; the five-number basket paying 6:1 has an edge of approximately 7.89%.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Conventional Single-Zero Bet Probabilities<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Payouts in this table are profit ratios. The original winning stake is returned separately. Percentages are rounded.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>Bet Type<\/strong><\/td><td><strong>Numbers Covered<\/strong><\/td><td><strong>Payout<\/strong><\/td><td><strong>Probability (Win %)<\/strong><\/td><\/tr><\/thead><tbody><tr><td><strong>Straight Up<\/strong><\/td><td>1<\/td><td>35:1<\/td><td>2.7%<\/td><\/tr><tr><td><strong>Split<\/strong><\/td><td>2<\/td><td>17:1<\/td><td>5.4%<\/td><\/tr><tr><td><strong>Street<\/strong><\/td><td>3<\/td><td>11:1<\/td><td>8.1%<\/td><\/tr><tr><td><strong>Corner<\/strong><\/td><td>4<\/td><td>8:1<\/td><td>10.8%<\/td><\/tr><tr><td><strong>Six Line<\/strong><\/td><td>6<\/td><td>5:1<\/td><td>16.2%<\/td><\/tr><tr><td><strong>Column\/Dozen<\/strong><\/td><td>12<\/td><td>2:1<\/td><td>32.4%<\/td><\/tr><tr><td><strong>Red\/Black<\/strong><\/td><td>18<\/td><td>1:1<\/td><td>48.6%<\/td><\/tr><tr><td><strong>Even\/Odd<\/strong><\/td><td>18<\/td><td>1:1<\/td><td>48.6%<\/td><\/tr><tr><td><strong>High\/Low<\/strong><\/td><td>18<\/td><td>1:1<\/td><td>48.6%<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Zero Concessions Change Settlement<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A qualifying La Partage rule returns half an even-money stake on zero. This changes the expected loss to half of 1\/37, approximately 1.35%. En Prison holds the qualifying stake subject to a later result; treatment of repeated zeros matters. See the <a href=\"https:\/\/winneronline.net\/ca\/casino-games\/roulette\/roulette-variations\/french-roulette\/\">French roulette explanation<\/a> rather than assuming every version has identical rules.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Multiple Spins and Conditional Probability<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">On a fair single-zero wheel, red occupies 18\/37 pockets. The probability that two specified consecutive spins are red is (18\/37)\u00b2, approximately 23.67%; for five it is (18\/37)\u2075, approximately 2.73%. Once four reds have already occurred, the next independent spin is still red with probability 18\/37, approximately 48.65%.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A probability for one specified sequence is different from the probability of seeing that sequence somewhere in a longer session. The latter depends on session length and overlapping possibilities.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">RTP Does Not Promise a Refund<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A theoretical return of 97.30% is an expectation over stakes under the stated model. It does not mean a person who starts with $100 will finish with $97.30. Turnover, repeated stakes and random variation affect actual results.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bets with more frequent small payouts can have the same house edge as less frequent larger payouts. Different variance does not imply a protected balance or a guaranteed session length.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Related Explanations<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">See <a href=\"https:\/\/winneronline.net\/ca\/casino-games\/roulette\/roulette-strategy\/inside-vs-outside-bets\/\">inside and outside bets<\/a>, <a href=\"https:\/\/winneronline.net\/ca\/casino-games\/roulette\/roulette-variations\/american-roulette\/\">American roulette and its basket exception<\/a>, and <a href=\"https:\/\/winneronline.net\/ca\/casino-games\/roulette\/roulette-strategy\/\">roulette system claims<\/a>. These calculations explain rules and do not establish availability of a particular version in Canada.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Related reading: <a href=\"https:\/\/winneronline.net\/ca\/casino-games\/slots\/slots-guide\/how-pokies-odds-work\/\">How Slot Probabilities Work: Reels, Weights and Returns<\/a> \u00b7 <a href=\"https:\/\/winneronline.net\/ca\/casino-games\/baccarat\/rules-table-mechanics\/baccarat-odds-house-edge\/\">Baccarat Odds and House Edge: Payout Assumptions Explained<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Roulette Odds and Probability: Payouts, House Edge and RTP Roulette probability depends on the number of pockets and the settlement rules. The examples below assume a fair wheel with equally likely pockets and independent spins. A payout ratio, winning probability and theoretical return are different quantities. Probability Is Not the Same as Odds Against A [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":233,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"page-without-title.php","meta":{"inline_featured_image":false,"footnotes":""},"class_list":["post-239","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Roulette Probability, Payouts and House Edge<\/title>\n<meta name=\"description\" content=\"Understand roulette outcome probabilities, payout ratios, zero pockets and long-run return. 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