What Happens If You Bet Every Roulette Number?
Last reviewed: June 2026
Betting every number on European roulette still loses money on every spin — because the payout is 35:1, not 36:1, and that one-unit gap is exactly the house edge. Cover all 37 numbers at $1 each, wager $37, and one number pays back $36 (the $35 profit plus your $1 stake). Net result: −$1 per spin, which is precisely 2.70% of the $37 you put at risk.
The idea of “covering all numbers” feels like a guaranteed win. It isn’t. The edge isn’t hiding in certain numbers while others are fair — it’s baked into the payout structure of every single bet. No coverage pattern can eliminate it.
The exact math: full coverage on European roulette
Place $1 on each of the 37 numbers (0 through 36):
| Amount | |
|---|---|
| Total wagered | $37 |
| Winning number pays (35:1) | $35 profit + $1 stake back = $36 returned |
| Losing 36 bets | −$36 |
| Net result | −$1 per spin |
The winning number returns $36, but you spent $37 to cover every number. You are short exactly $1 — which is 1 ÷ 37 = 2.70%, the same house edge you face on any single straight-up bet.
This is not a quirk of the full-coverage scenario. Every roulette bet on a fair European wheel carries the same 2.70% edge, because every payout is set one unit lower than the true odds.
Coverage vs. single-number betting: same expected loss
Consider two players each wagering $37 per spin:
Player A — one number, $37 straight up
- Wins 1 in 37 spins on average. Profit when it hits: $37 × 35 = $1,295 net. Loses $37 the other 36 spins.
- Expected loss per spin: $37 × (1/37) = $1 (2.70% of $37).
Player B — all 37 numbers at $1 each
- Wins one bet, loses 36 bets, every single spin.
- Net per spin: $35 − $36 = −$1 (2.70% of $37).
Both players expect to lose $1 per spin on a $37 wager. What changes is variance: Player A faces wild swings — 36 losses in a row interrupted by an occasional large win. Player B sees the same small loss on every spin. The distribution of outcomes is completely different; the expected loss per dollar wagered is identical.
Why the “hedge” logic fails
A true hedge reduces your expected loss by offsetting positions. Covering all roulette numbers does not offset anything — it simply multiplies identical losing bets. Because the edge is uniform across all bets at 2.70%, adding more bets at that same edge cannot reduce it. You are not hedging; you are scaling.
The only lever that changes the expected loss rate on a roulette wheel is which wheel you play. European (single-zero) carries a 2.70% edge. American (double-zero) carries a 5.26% edge. Triple-zero wheels reach 7.69%. No bet selection or coverage pattern changes these figures — they are structural properties of the wheel.
For more on how payout gaps create permanent edges, see House Edge Explained.
What full coverage actually does
Spreading bets across all 37 numbers is a variance-reduction technique, not an edge-reduction technique. If your goal is to extend session time and experience many small, predictable losses rather than occasional large ones, full coverage accomplishes that. But your bankroll still erodes at 2.70% of every dollar wagered — the rhythm changes, the math does not.
If session longevity is your priority, roulette session longevity strategies covers bankroll pacing in more detail.
American roulette makes it worse
On an American double-zero wheel, you would need to cover 38 numbers ($38 wagered). The winning number still pays 35:1 — returning $36. Net loss: $2 per spin, which is 2 ÷ 38 = 5.26%. Adding that extra zero pocket is what drives the American edge up, and full coverage makes the arithmetic plainly visible.
| Wheel | Numbers | Wager (full coverage) | Returned | Net loss | Edge |
|---|---|---|---|---|---|
| European (single-zero) | 37 | $37 | $36 | −$1 | 2.70% |
| American (double-zero) | 38 | $38 | $36 | −$2 | 5.26% |
| Triple-zero | 39 | $39 | $36 | −$3 | 7.69% |
Each extra zero pocket adds one more losing bet while the payout stays fixed at 35:1.
For a side-by-side comparison of wheel variants, see American vs. European Roulette.
Frequently asked
Doesn’t covering all numbers guarantee I win on every spin?
You win one bet, but you lose 36 others. Winning one bet at 35:1 returns $36 on a $37 outlay. You are guaranteed to net −$1 every spin — a guaranteed loss, not a guaranteed win.
What if I use different bet types — dozens, columns, splits — alongside straight-up bets?
It makes no difference. Dozen bets, column bets, corners, splits — every standard European roulette bet carries the same 2.70% edge. Combining them in any proportion still produces 2.70% expected loss on total dollars wagered.
Is “covering numbers” ever mentioned as a strategy worth trying?
It shows up frequently in gambling myth content, usually framed as a “can’t-lose” system. It can’t lose individual spins of individual bets, true — but the overall session always loses to the house. The same logical flaw underlies martingale and other bet-sizing systems: see Gambler’s Fallacy and Betting Myths for a full breakdown.
How does roulette compare to other casino games?
European roulette at 2.70% is middle-of-the-road. Blackjack with basic strategy runs around 0.5%. Baccarat Banker sits at 1.06%. The worst standard roulette bet — the American five-number bet on 0, 00, 1, 2, 3 — reaches 7.89%. For a ranked comparison, see Best and Worst Casino Bets.
Sources & further reading
- Wizard of Odds — House Edge — payout structure and house edge methodology
- /learn/house-edge/ — how the edge is calculated and what it means for your bankroll
- /learn/american-vs-european-roulette/ — wheel variants and their edge differences
Educational explanation only. No real-money gambling happens on LearnTheOdds.
Responsible gambling: Play for entertainment, not income — the math favors the house over time. Set limits, never chase losses, and if it stops being fun, take a break. 21+. Need help? Call 1-800-MY-RESET (1800myreset.org).