+1800 Odds Explained
- Decimal
- 19.00
- American
- +1,800
- Fractional
- 18/1
- Implied probability
- 5.26%
- Polymarket
- 5¢
- $100 wins
- 1,800.00
- American
- +1,800
- Fractional
- 18/1
- Implied probability
- 5.26%
- Polymarket
- 5¢
- Profit
- 1,800.00
- Total return
- 1,900.00
19.000 decimal, +1,800 American, 5.26% implied probability
American odds of +1800 mean
a 100 stake wins 1800
. In decimal notation that is 19.00, in fractional notation 18/1, and the implied probability is 5.26%. On a prediction market the same price is a 5¢ share.
What +1800 pays
A 100 stake at +1800 returns 1,900.00 in total: your 100 back plus 1,800.00 profit. To win exactly 100 you would stake 5.56. The table covers the stakes people actually use.
| Stake | Profit | Total return |
|---|---|---|
| 10 | 180.00 | 190.00 |
| 25 | 450.00 | 475.00 |
| 50 | 900.00 | 950.00 |
| 100 | 1,800.00 | 1,900.00 |
| 500 | 9,000.00 | 9,500.00 |
| 1,000 | 18,000.00 | 19,000.00 |
Break-even and long-run results
The implied probability of +1800 is 5.26%, and that number is also the break-even win rate: win more often than 5.26% of the time at this price and you profit in the long run, win less often and you lose. The table shows the return on stake at a few win rates, including the break-even rate itself.
| Win rate | Return on stake |
|---|---|
| 5% | -5.0% |
| 50% | 850.0% |
| 55% | 945.0% |
| 60% | 1,040.0% |
| 65% | 1,135.0% |
+1800 is a longshot. The bookmaker prices the outcome at 5.26%, and the payout of 1,800.00 per 100 staked is the compensation for how rarely it lands. Longshots carry more margin than any other part of the market, which is why devigging methods disagree most at prices like this one.
The vig at +1800
If both sides of a two-way market were priced at +1800, the implied probabilities would add up to -89.47% above 100%. That excess is the overround, or vig; as a share of stakes it is a -850.00% margin for the bookmaker. Removing it leaves fair odds of 2.00 decimal ( +100) on each side. Use the devig calculator to do the same for any market.
+1800 on a betting exchange
Exchanges charge commission on net winnings, so the price you see is not the price you get. At 2% commission +1800 is worth 18.640 decimal (+1,764 American); at 5% it drops to 18.100 (+1,710). Those are the bookmaker prices you would need to beat.
| Commission | Effective decimal | Effective American | Break-even |
|---|---|---|---|
| 2% | 18.640 | +1,764 | 5.36% |
| 5% | 18.100 | +1,710 | 5.52% |
Same price in other formats
Nearby prices
Nearby prices
Frequently asked questions
What does +1800 mean in betting?
+1800 is an American price. Positive numbers show the profit on a 100 stake; negative numbers show the stake needed to win 100. At +1800 the implied probability is 5.26% and a 100 stake returns 1,900.00.
What is +1800 in decimal odds?
+1800 converts to 19.000 in decimal odds (usually shown as 19.00). Decimal odds are the total return per unit staked, so multiply your stake by 19.000 to get the return.
What is +1800 as a fraction?
+1800 is 18/1 in fractional odds, the traditional bookmaker notation where the top number is profit and the bottom number is stake.
How much do I win on a 100 bet at +1800?
A 100 stake at +1800 wins 1,800.00 in profit and returns 1,900.00 including the stake. To win exactly 100 you would stake 5.56.
What win rate do I need at +1800?
The break-even win rate equals the implied probability, 5.26%. Winning more often than that at this price is profitable over the long run; winning less often loses money.