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Paroli strategy guide · Updated October 2026

Paroli Roulette Strategy: Calculator, Streak Odds and Results

The Paroli system doubles your bet after a win and goes back to one unit after a loss, banking the profit after three wins in a row. It's the Martingale turned upside down. Pick your streak, unit and bankroll to see your exact odds per run and how 10,000 sessions turn out.

A losing run costs just $1 a spin with $1 units: ten losses cost $10, against $1,023 with Martingale. The catch is the streak. Three wins in a row on red come up 11.5% of the time, and in our test $100 reached $150 in only 21.0% of sessions.

  • Free Paroli calculator
  • Exact streak odds
  • 10,000 sessions per run

We earn a commission if you sign up through our casino links. It doesn't change the numbers: every figure on this page is calculated or simulated from the wheel's real odds.

Interactive

Paroli Calculator: Your Streak, Your Odds

Choose how many wins in a row you'll let ride, your unit and your bankroll. The cards are exact math for one Paroli run; below them, 10,000 sessions played in your browser show how a whole session tends to end.

Wins in a row before you reset
Unit
Bankroll
More settings100 spins a session · European wheel
Spins in a session
Wheel
Bet 1$1win: +$1 so far
Bet 2$2win: +$3 so far
Bet 3$4win: +$7 so far
Bank it+$7back to $1
Chance to finish the streak11.5%1 in 9 runs
Win when it lands+$71 + 2 + 4 units
Average per 100 spins−$4.58the 2.70% house edge on what you bet

10,000 sessions

100 spins each, $100 bankroll, $1 units

Finished ahead
38.5%
Typical result
−$5
the median session
9 in 10 ended between
−$36 and +$29
the other 1 in 10 landed further out
How the 10,000 sessions finished

Down Up. Each bar is a range of final results.

Most Paroli sessions finish a little down, a few finish well up when streaks bunch together, and the average is always the house edge on what you bet.

The rules

How the Paroli System Works

Paroli is a positive progression: your bet goes up after a win, not after a loss. You play it on even-money bets such as red, black, odd, even, 1–18 or 19–36. The idea is to risk only one unit of your own money at a time and let winnings ride when a streak comes along.

The name comes from old card games such as basset and faro, where a paroli meant letting a winning stake ride. It's also known as the Reverse Martingale, though the classic Paroli caps the streak at three wins so a hot run is banked before it can turn.

  1. Bet one unit

    Pick a unit, usually the table minimum, and bet it on an even-money bet.

  2. Win: double it

    After a win, bet twice as much: 1, then 2, then 4 units. Your stake is now made of winnings.

  3. Lose or win three: reset

    After any loss, or after the third win in a row, go back to one unit. Three wins bank 7 units.

How Paroli moves your bet10 spins: 7 wins, 3 losses, 5 units ahead
  1. 1Win+1+1
  2. 2Win+2+3
  3. 4Win−3+7
  4. 1Losssame+6
  5. 1Win+1+7
  6. 2Loss−1+5
  7. 1Win+1+6
  8. 2Win+2+8
  9. 4Loss−3+4
  10. 1Win+1+5

Bets in units on an even-money bet: double after a win, back to 1 after a loss or after three wins in a row. Seven wins and three losses, and the one completed streak does most of the work.

A $1 Paroli run, step by step

Three wins, then a loss and a win.

  1. Bet 1$1Wins · +$1
  2. Bet 2$2Wins · +$3
  3. Bet 3$4Wins · +$7, banked
  4. Bet 4$1Loses · +$6
  5. Bet 5$1Wins · +$7

Three wins turned $1 into $8 on the table: $7 of profit, which you bank before going back to $1. If the third bet had lost instead, you'd have given back the $3 won on the first two bets and the $1 you started with: down just $1.

Paroli chart

Paroli Betting Chart: The Streak Ladder

Each step of a Paroli streak with $1 and $5 units: the bet, what you'd bank by stopping after that win, what you'd lose if the next bet loses, and how often a run gets that far on a European wheel.

Bet $1 units: stake $5 units: stake Bank after this win ($1) If this bet loses ($1) Chance of winning this many in a row
1 $1 $5 +$1 −$1 48.6% (about 1 in 2)
2 $2 $10 +$3 −$1 23.7% (1 in 4)
3 classic stop $4 $20 +$7 −$1 11.5% (1 in 9)
4 $8 $40 +$15 −$1 5.6% (1 in 18)
5 $16 $80 +$31 −$1 2.7% (1 in 37)
6 $32 $160 +$63 −$1 1.3% (1 in 75)

"If this bet loses" is always one unit: every bet after the first is made of the winnings before it. Steps 4 to 6 are for players who let a streak run longer than the classic three.

The formula behind the chart

Win n in a row and you bank 2n − 1 units. Lose at any point and you're down one unit. With p, the chance of winning one bet, the average result of a run is (2p)n − 1. On a European wheel 2p is 36/37, so the average is always a little below zero.

Why it still loses

A three-win streak pays 7 units but comes up about once in 8.7 runs; the other 7.7 runs cost 1 unit each. On average that's 0.08 units lost per run, which is 2.70% of the 2.9 units a run bets on average.

Choose your streak

How Many Wins Should You Let Ride?

Two, three, four or more. A longer streak pays more when it lands but lands less often, and it puts more of your winnings on the table. Exact figures for one run on a European wheel, $1 units.

Wins in a row Chance per run Bank when it lands Biggest bet Spins per run Average per 100 spins
2 23.7%1 in 4 +$3 $2 1.49 −$3.59
3 classic 11.5%1 in 9 +$7 $4 1.72 −$4.58
4 5.6%1 in 18 +$15 $8 1.84 −$5.65
5 2.7%1 in 37 +$31 $16 1.89 −$6.76
6 1.3%1 in 75 +$63 $32 1.92 −$7.89

"Average per 100 spins" is the exact expected result with $1 units. It grows with the streak because longer streaks put bigger bets on the table; as a share of what you bet, it's 2.70% for every row.

Head to head

Paroli vs Martingale: Mirror Images

Martingale doubles after a loss to win back one unit; Paroli doubles after a win to grow one unit into seven. They fail in opposite ways.

10 losses in a row, $1 unitsWhat a losing run costs with each system
  • Paroli$10
  • D'Alembert$55
  • Labouchere$85
  • Fibonacci$143
  • Martingale$1,023

Drawn to scale. Ten losses in a row on red happen 1 in 784 tries on a European wheel; for Paroli they're no worse than any other ten losses.

Paroli Martingale
Raises the bet afterA winA loss
Biggest bet (classic)4 units, mostly winningsNo cap: 64 units after 6 losses
A losing run of 6 costs6 units63 units
A good run pays7 units for 3 wins in a row1 unit per completed run
$100 reached $150 (our test)21.0%48.8%
Average result per session−$36.01 on $1,335 bet−$6.32 on $233 bet
How it failsSlowly: lots of one-unit lossesSuddenly: one long run wipes you out

Paroli's average loss per session is bigger only because its sessions last far longer and bet far more in total: 2.7% of everything bet, the same as Martingale. Read the Martingale guide and the D'Alembert guide.

Bankroll and goals

Paroli Works Best for Small Goals

How often Paroli grew a bankroll by half with $1 units in our test. A completed streak is a big step toward $10 but a small one toward $100, so the bigger the goal, the more one-unit losses pile up before you get there.

Grow the bankroll by half, $1 unitsParoli's success rate falls fast as the goal grows
  1. $20 to $30a +$10 goal56.4%D'Alembert 56.9%
  2. $50 to $75a +$25 goal44.6%D'Alembert 55.4%
  3. $100 to $150a +$50 goal21.0%D'Alembert 52.8%
  4. $200 to $300a +$100 goal3.0%D'Alembert 48.7%

200,000 sessions per row, European wheel, up to 1,000 spins. With $200, Paroli rarely got there within 1,000 spins, and most of those sessions were still going when the spins ran out.

Bankroll you need

Paroli's biggest bet is four units, and three of them are winnings. A losing run costs one unit a spin, so 20 to 50 units is plenty to ride out normal swings.

How long it lasts

With $100 and $1 units, half our test sessions were still going after 1,000 spins, having bet about $1,690 each. Plan your stopping point by time as well as money.

A typical session

With $1 units and 100 spins, about 4 in 10 Paroli sessions finish ahead, and the typical one ends about $5 down. The best 1 in 20 finish $29 or more up.

A sensible goal

A completed streak pays 7 units. A goal of 10 to 25 units gives Paroli a real chance; asking it to grow $100 by half means waiting through hundreds of one-unit losses.

Table limits

Paroli Table Limits: The Minimum Is What Matters

A classic Paroli never bets more than four units, so the table maximum doesn't matter. The minimum does: it sets your unit, and the smaller your unit, the more runs your bankroll buys. The lowest single-zero live table at each casino we list:

Casino Lowest single-zero bet Top Paroli bet at that unit A 3-win streak banks Play
MyBookie $0.10 $0.40 +$0.70 Play
Wild Casino $0.50 $2 +$3.50 Play
BetUS $0.50 $2 +$3.50 Play
BetOnline $0.50 $2 +$3.50 Play
The Online Casino $0.50 $2 +$3.50 Play
DuckyLuck $0.50 $2 +$3.50 Play
Ignition $1 $4 +$7 Play
Cafe Casino $1 $4 +$7 Play

From the limits posted on each casino's live tables, checked October 2026. The minimum on red or black can differ from the table minimum.

Best table for ParoliThe lowest minimum. MyBookie has live tables from $0.10, so a full three-win streak tops out at a $0.40 bet and a $20 bankroll covers 200 one-unit losses.

Play at MyBookie

The honest answer

Does the Paroli Strategy Work?

Not as a way to beat roulette. Paroli loses 2.70% of every dollar bet on a European wheel, like every other system. What it changes is the shape of your results: lots of small losses, occasional bigger wins, and almost no chance of one disastrous run.

That makes it a calm way to play for small stakes and small goals. It's a poor way to chase a big target: in our test, half the sessions aiming to grow $100 to $150 were still short of it after 1,000 spins.

100 Paroli sessions, $100 eachHow often $100 became $150 within 1,000 spins
Reached $15021sessions, winning $51 on average
Ran out of money29sessions, losing all $100 after a long slide
Still playing at 1,000 spins50sessions, most of them down
Average over all sessions−$36.01on $1,335 bet: 2.7%

$1 units, European wheel, from 200,000 sessions in our strategy simulator.

French with La Partage

30.0%

reached $150. Average result −$17.78 per session.

European

21.0%

reached $150. Average result −$36.01 per session.

American

8.9%

reached $150. Average result −$66.69 per session.

200,000 sessions per wheel: $100 bankroll, $1 units, three-win Paroli, up to 1,000 spins. None of the sites we list has a French table, so European is the best wheel you'll find there.

Variations

Paroli Variations

No cap

Reverse Martingale

Keep doubling after every win with no set stop. One long streak can pay a lot, but the first loss takes back everything the streak won plus your unit.

How Martingale compares

2 to 1 bets

Paroli on dozens or columns

Triple instead of double after a win, because a dozen pays 2 to 1. Two wins in a row turn one unit into nine, but they come up only about one time in ten.

See what each bet pays

Gentler climb

Reverse D'Alembert

Add one unit after a win instead of doubling, and take one off after a loss. Streaks pay less, but a single loss gives back less too.

D'Alembert guide

Opposite approach

Labouchere

A negative progression that spreads losses over a list. It reached small goals far more often in our test, but its failures cost most of the bankroll.

Labouchere tracker

Before you play

Paroli Tips for Real Money Roulette

None of these beat the house edge. They help you play a slow, low-risk system without letting it run forever.

  1. Decide your streak before you start

    Pick how many wins you'll let ride, usually three, and stick to it. Pressing on after a streak is how a 7-unit win turns back into a 1-unit loss.

  2. Play a European or French wheel

    Paroli reached its goal in 21.0% of our test sessions on a European wheel and only 8.9% on an American one.

  3. Use the table minimum as your unit

    Paroli bets stay tiny, so a low minimum lets you play for longer with the same bankroll. Your biggest bet is only four units.

  4. Set a small goal

    Paroli is best at nudging a bankroll up a little. In our test it grew $20 to $30 more than half the time, and $200 to $300 almost never.

  5. Set a time or spin limit

    Paroli loses slowly, so sessions run long. Half of ours were still going after 1,000 spins. Decide when you'll stop as well as how much.

  6. Count your streak out loud

    After a loss, your next bet is always one unit. After a win, double, unless that was your third win in a row.

  7. Read the bonus terms

    Many bonuses exclude roulette or count it at a low rate toward wagering. Check before you opt in.

  8. Practice free first

    Play a few sessions with free chips in our roulette simulator before you use the system with real money.

Real money

Best Roulette Sites for the Paroli System

Paroli needs a low minimum more than a high maximum, because your biggest bet is only four units. These sites post the limits on their live tables. Pick a European wheel: none of them has a French table with La Partage.

#1 MyBookie Single-zero tables from $0.10 to $10,000 200% up to $2,000 Read our MyBookie review Play now
#2 Wild Casino Single-zero tables from $0.50 to $12,500 250 Free Spins Read our Wild Casino review Play now
#3 BetUS Single-zero tables from $0.50 to $12,500 250% up to $5,000 Read our BetUS review Play now

Affiliate links: we may earn a commission if you sign up through these buttons. They open real money casinos, not our free tools. Ranked as on our best online roulette sites list; compare all 10 in our roulette site reviews.

Paroli Roulette FAQs

What is the Paroli roulette strategy?

A positive progression: you double your bet after a win and go back to one unit after a loss. The classic version banks the profit and resets after three wins in a row, so a full streak of 1, 2 and 4 units wins 7 units. It's also called the Reverse Martingale.

Does the Paroli system work?

It limits losses but can't beat the house edge. In our test, Paroli turned $100 into $150 in 21.0% of sessions with $1 units, and half the sessions were still going after 1,000 spins. The average result was −$36.01 on $1,335 bet: 2.7% of everything bet.

How often do you win three in a row on red?

On a European wheel, 11.5% of the time, about 1 in 9 tries. On an American wheel it's 10.6%. That's the streak the classic Paroli needs to bank 7 units.

How much can you lose with Paroli?

One unit per failed run, whenever the loss comes. Lose the first bet and you're down 1 unit; win 1 and 2 units, then lose the 4-unit bet, and you're still down only 1 unit, because the bet you lost was made of the winnings. Ten failed runs cost 10 units.

Is Paroli better than Martingale?

It's safer per run: a losing run costs one unit a spin, against Martingale's doubling. But it wins far less often: in our test Paroli reached $150 from $100 in 21.0% of sessions, Martingale in 48.8%. Both lose about 2.7% of what you bet.

How many wins should I aim for with Paroli?

Three is the classic choice. Two wins in a row come up about 24% of the time and pay 3 units; four come up 5.6% of the time and pay 15. Longer streaks pay more when they land, but every target loses the same 2.7% of what you bet on a European wheel.

What bankroll do I need for Paroli?

Less than any negative progression, because your biggest bet is 4 units and part of it is winnings. 20 to 50 units covers ordinary swings. Paroli did best on small goals: in our test, $20 grew to $30 in 56.4% of sessions, but $200 reached $300 in only 3%.

Can I use Paroli on other bets?

Yes. On a dozen or column, which pays 2 to 1, players often triple instead of double. The idea and the risk are the same: you let winnings ride for a few spins and accept one-unit losses in between. The house edge stays 2.70% on a single-zero wheel.

Which wheel is best for Paroli?

French with La Partage, then European. In our test Paroli reached its goal in 30.0% of sessions on a French wheel, 21.0% on a European wheel and 8.9% on an American wheel.

Can I practice Paroli for free?

Yes. Use the calculator on this page to see your odds, then play the system with free chips in our roulette simulator. Free chips have no cash value.

More strategies and free tools

Play for real

How we worked it out, and references

The streak and run figures are exact for the classic Paroli on an even-money bet: double after a win, back to one unit after a loss or after the last win of the streak. The session odds come from the same engine as our strategy simulator: 200,000 sessions per result, $100 bankroll, $1 units, a $50 goal, up to 1,000 spins and a $5,000 table maximum, with zero losing in full except under La Partage. The calculator plays 10,000 sessions in your browser with the same rules. Table minimums are from each casino's live lobby. Further reading: Wizard of Odds on betting systems and Random Services on roulette probabilities.

21+

No system makes roulette safe

Set a budget before you start, never borrow to keep a progression going, and stop when it's gone. If gambling stops being fun, call 1-800-GAMBLER or visit ncpgambling.org for free, confidential help.