How the 150 Dollar Two-Dozen Roulette Layout Works

In this layout, $150 is the total stake per spin, not the starting bankroll. You place two $50 dozen bets and ten $5 straight-up bets in the remaining dozen. On a European wheel, this covers 34 of 37 numbers, but only 10 of 37 outcomes produce a net profit. Expected value (EV), the average net result under the model, is negative.

The key distinction is that hitting a covered number does not necessarily mean making money. A dozen hit returns the entire stake without profit, a straight-up hit produces +$30, and an uncovered number loses $150.

The name alone does not define the rules. It is sometimes used for a $150 starting bankroll with smaller bets. This guide examines the layout that stakes $150 on every spin.

How to place the bets

Place $50 on the first dozen, $50 on the second dozen, and $5 on each number from 25 through 34. Those last ten bets are separate straight-up bets, each covering one number.

The calculation assumes ordinary roulette with 37 or 38 pockets and standard profit payouts of 2:1 for dozens or columns and 35:1 for straight-up bets.

To reproduce the layout:

1. Check the wheel type and paytable. A European wheel has 0; an American double-zero wheel has 0 and 00.
2. Place $50 in the first-dozen betting area, covering 1–12.
3. Place $50 in the second-dozen betting area, covering 13–24.
4. Place $5 in the center of each number from 25 through 34. A chip placed on a line becomes a different bet.
5. Check chip denominations, minimum and maximum bet limits, and the $150 total before confirming.

The uncovered numbers are 0, 35 and 36 on a European wheel, plus 00 on an American wheel. A free calculator or demo is enough to study the layout; you do not need to wager money.

You can choose a different set of ten numbers within the remaining dozen. Under the uniform, independent-spin model, the particular numbers offer no advantage. Previous results and “hot” colors do not predict the next spin.

Can you use columns instead of dozens?

Yes. Two columns plus ten straight-up bets only in the third column produce the same distribution of results with standard payouts. The two columns cover 24 numbers, and the separate bets add ten more.

Do not combine one dozen and one column as though they were non-overlapping groups. They overlap, changing both coverage and payouts. For a separate explanation of column betting, see the first and third column guide.

What do you receive after each spin?

Your net result is the gross return, including the winning bet's returned stake, minus the entire $150 placed on the spin. A dozen hit therefore breaks even, a straight-up hit earns +$30, and a miss loses $150.

A 2:1 profit payout on a $50 dozen bet pays $100 in profit on that bet and returns its $50 stake. The gross return is $150. Subtracting the whole layout gives $150 − $150 = $0.

For a $5 straight-up bet, the gross return is 35 × $5 + $5 = $180. The spin's net result is $180 − $150 = +$30. A miss returns $0, giving a net result of −$150.

Historical support for these standard payouts appears in the New Jersey regulator's rules compilation, §13:69F-5.1–5.2, physical page 231. The PDF's creation and modification metadata are dated October 12, 2016. This is a historical source, not confirmation of current rules or bet limits at every table.

Original English roulette payout table fragment from the New Jersey regulator's rules compilation

Original English paytable from the 2016 document snapshot, cropped for readability. Source: New Jersey regulator, page 231.

Coverage of 34/37 = 91.89% is the probability of a non-losing spin, not the probability of profit. The probability of a net profit is 27.03%.

One full miss erases the profit from five straight-up hits. The session's net result is:

$30 × profitable hits − $150 × misses.

To finish ahead, the number of profitable hits must exceed five times the number of misses. Dozen hits do not change the session total.

How do European and American wheels compare?

The European wheel has a lower expected loss: −$4.05 per $150 stake, compared with −$7.89 on the American wheel. The extra 00 increases the number of uncovered outcomes from three to four.

These calculations assume uniformly distributed, independent spins, standard payouts, and no commissions or bonus conditions. Table figures are rounded to two decimal places.

European-wheel EV:

(24 × 0 + 10 × 30 − 3 × 150) / 37 = −150/37 = −$4.05.

American-wheel EV:

(24 × 0 + 10 × 30 − 4 × 150) / 38 = −300/38 = −$7.89.

House edge is the mathematical expected loss as a fraction of the stake, not the probability of losing. RTP is the theoretical long-run ratio of total return to total stakes, not a hit rate or the probability of a profitable session. See the house edge guide for more on this distinction.

Exactly 100 placed full bets of $150 produce $15,000 in turnover. Expected losses are $405.41 on the European wheel and $789.47 on the American wheel. These are model averages, not predictions of your actual loss or estimates of the bankroll required.

The chart has its own European/American wheel switch. It always shows 34 covered numbers, independently of the straight-up count in the calculator below.

What might a ten-spin session look like?

In this illustrative example, a $500 bankroll falls to $320 despite eight hits on covered numbers. This is an accounting example, not actual play or a “typical” sequence.

The layout stays unchanged: a $150 total stake with net outcomes of $0, +$30 or −$150.

Four profitable outcomes earn $120, two misses lose $300, and four outcomes break even. The net result is −$180.

High coverage does not prevent this result: a miss costs five times as much as a straight-up hit earns.

How much bankroll do you need, and when should you stop?

There is no universal safe minimum bankroll. $150 funds one full stake and can be lost entirely; $500 provides more room to continue but does not guarantee that you can complete the planned spins.

Three consecutive full losses change the bankroll as follows:

$500 → $350 → $200 → $50.

You must then stop because $50 is less than the $150 full stake. The balance is not zero, but it cannot fund another unchanged layout.

Dividing $500 by the average expected loss of $4.05 does not predict session length. EV describes an average under the model; your ability to continue depends on the sequence of outcomes.

What does the exact calculation show for a 500-dollar bankroll?

With a $500 starting bankroll and at most 20 spins, the probability of finishing above the starting balance is 34.93% on the European wheel and 23.76% on the American wheel. These results apply only to the session stop rule below.

The model uses a fixed $150 stake, no reloads or stake increases, and no earlier profit or loss target. Before each spin, play stops if the bankroll is below $150.

The final row is a subset of results below $500, not another category to add to the first three. It means being unable to place another $150 stake, not losing all $500.

This is an original exact mathematical model, not observed casino results. For the European wheel, it works as follows:

1. Begin with balance $500 and probability 1.
2. From each playable balance B, distribute its probability to B with weight 24/37, B + $30 with weight 10/37, and B − $150 with weight 3/37.
3. Add probabilities from different paths that reach the same balance.
4. Keep balances below $150 stopped, without assigning them further spins.
5. Repeat for 20 steps, then aggregate balances above, equal to and below $500, and below $150.

For the American wheel, use weights 24/38, 10/38 and 4/38. The embedded calculator below does not display these exact session percentages.

A time, loss or profit boundary limits play; it cannot make EV positive or guarantee profit. Do not chase losses by increasing stakes. If $150 exceeds what you can afford to lose, use the free calculation instead of wagering.

How can you scale the stake or compare other layouts?

To preserve the break-even dozen outcome with ten straight-up bets, keep the dozen-to-single stake ratio at 10:1. For example, $10 on each dozen and $1 on each of ten numbers produce a $30 total stake and net outcomes of $0, +$6 or −$30.

On a European wheel, this scaled layout has an EV of −$0.81 per spin. Its probabilities and house edge remain unchanged; its monetary outcomes are one-fifth of the original amounts.

For a general calculation, let d be the stake on each dozen, s the stake on each straight-up number, and k the number of straight-up bets. With two dozens and all singles outside those dozens:

• Total stake T = 2d + ks.
• Winning-dozen net result = 3d − T = d − ks.
• Winning-single net result = 36s − T.
• Miss net result = −T.

In plain English, add every stake first, then subtract that total from the winning bet's gross return.

Changing only some stakes can remove the break-even outcome. With $5 on each dozen and $1 on each of ten numbers, the total is $20: a dozen hit loses $5, a straight-up hit earns $16, and a miss loses $20.

A theoretical $5/$0.50 combination with ten singles would total $15. However, the tool's straight-up minimum is $1, so that combination cannot be entered in its fields.

The red-bet comparison assumes that zero loses the full stake. These layouts have the same standard European-wheel house edge but different outcome distributions. This applies to the stated standard bet classes, not every roulette variant.

The 24+8 layout is not a directly scaled copy: it covers fewer numbers, and a dozen hit produces a loss. See the separate 24+8 strategy guide for that calculation.

How do you check the layout in the calculator?

Select the European wheel and enter 50, 5, 10, 500 and 20 in the corresponding fields. Analysis updates automatically; the run button is needed only to generate a random session sample.

Use these controls:

1. Select European.
2. Enter 50 in Dozen Bet ($).
3. Enter 5 in Straight-Up Bet ($).
4. Enter 10 in Straight-Up Numbers.
5. Enter 500 in Starting Bankroll ($).
6. Enter 20 in Number of Spins.

English calculator inputs showing European roulette, stakes of 50 and 5 dollars, ten straight-up numbers, a 500-dollar bankroll and 20 spins

Calculator inputs for the European-wheel 50/5/10/500/20 example. This screenshot shows the local interface, not a test of the published site.

Check the analysis:

• Total stake: $150.
• Expected value (EV): −$4.05.
• Outcome probabilities: 64.9%, 27.0% and 8.1%.
• Net outcomes: $0, +$30 and −$150.
• Coverage: 91.9%.

Calculator results for the 150-dollar layout showing EV of minus 4.05 dollars, coverage of 91.9 percent and three outcome categories

Results for the same layout in the local calculator interface. The interface rounds probabilities to one decimal place; the article tables use two. These are not different models.

Switch to American: EV becomes −$7.89 and the miss probability becomes 10.5%. Then switch back to European before checking the smaller layout. Stakes of 10 and 1 with ten straight-up numbers give a $30 total stake, a +$6 profitable outcome, a −$30 miss and EV of −$0.81.

What does Run Simulation do?

Run Simulation generates one random sequence and stops when the bankroll falls below the full stake. It may therefore complete fewer spins than planned.

A sample is not a casino test or a forecast. Another run can produce a different result. Reset resets the settings; check the fields again before your next calculation.

The controls allow 1–12 straight-up numbers and 1–100 spins. The tool models outcome categories, but does not select specific table numbers, account for bonus rules, verify provably fair play or predict a spin. It also does not calculate the exact session-profit distribution under a stop rule.

If you change the straight-up count, use the calculator's analysis. The separate chart above remains fixed at 34 covered numbers.

What should you check before using the layout?

Check the paytable, bet limits and amount you could lose: high coverage does not remove negative EV. Treat this guide as an explanation of the calculation, not a promise of earnings or a claim that this is the “best” strategy.

An extra chip on zero increases the total stake and changes all net payouts; it is not free insurance. La partage and En prison apply only to qualifying even-money bets under the table's stated rules, not this dozen-and-straight-up layout.

Multiplier or bonus roulette requires a separate review of the rules. Also check age requirements and whether play is permitted in your jurisdiction; the article's language does not establish eligibility.

The practical approach is to check the layout for free, set time and loss boundaries in advance, and avoid increasing stakes to recover losses. Covering 34 numbers makes many spins break even, but does not make the layout profitable.