40.00 Decimal Odds Explained
- Decimal
- 40.00
- American
- +3,900
- Fractional
- 39/1
- Implied probability
- 2.50%
- Polymarket
- 3¢
- $100 wins
- 3,900.00
- American
- +3,900
- Fractional
- 39/1
- Implied probability
- 2.50%
- Polymarket
- 3¢
- Profit
- 3,900.00
- Total return
- 4,000.00
40.000 decimal, +3,900 American, 2.50% implied probability
Decimal odds of 40.00 return 40.00 for every 1.00 staked, stake included, so the profit on a unit is 40.00 minus one. The same price is +3,900 in American notation and 39/1 as a fraction, and it implies an implied chance of 2.50% of winning.
What 40.00 pays
Multiply the stake by 40.00 to get the total return. A 100 stake returns 4,000.00, of which 3,900.00 is profit. To win 100 in profit you would need to stake 2.56.
| Stake | Profit | Total return |
|---|---|---|
| 10 | 390.00 | 400.00 |
| 25 | 975.00 | 1,000.00 |
| 50 | 1,950.00 | 2,000.00 |
| 100 | 3,900.00 | 4,000.00 |
| 500 | 19,500.00 | 20,000.00 |
| 1,000 | 39,000.00 | 40,000.00 |
Break-even and long-run results
One divided by 40.00 is 2.50%: the implied probability, and the win rate at which betting this price neither makes nor loses money. The rows below show the return on stake at several win rates.
| Win rate | Return on stake |
|---|---|
| 3% | 20.0% |
| 50% | 1,900.0% |
| 55% | 2,100.0% |
| 60% | 2,300.0% |
| 65% | 2,500.0% |
40.00 is a longshot price implying 2.50%. Bookmakers shade longshots more than any other price, so the true chance is usually a little higher than the implied figure suggests; the power and Shin devigging methods exist largely to model that shading.
Converting 40.00 by hand
Every other format follows from the decimal price in one step. Implied probability is one divided by 40.00, which gives 2.50%. American odds depend on which side of 2.00 the price sits: at or above 2.00, multiply (40.00 − 1) by 100 to get +3,900. The fraction is 40.00 − 1 written as a ratio and snapped to the nearest traditional price, 39/1. A prediction market simply quotes the probability in cents: 3¢.
The vig at 40.00
If both sides of a two-way market were 40.00, their implied probabilities would sum to -95.00% above 100%. That is the overround; as a share of stakes it is a -1,900.00% margin. The fair price with the margin removed is 2.00 on each side. The devig calculator does this for any market and any method.
40.00 on a betting exchange
Exchange commission comes off winnings, so 40.00 at 2% commission is really 39.220, and at 5% it is 38.050. The break-even win rate rises accordingly.
| Commission | Effective decimal | Effective American | Break-even |
|---|---|---|---|
| 2% | 39.220 | +3,822 | 2.55% |
| 5% | 38.050 | +3,705 | 2.63% |
Same price in other formats
Same price in other formats
Nearby prices
Nearby prices
Frequently asked questions
What does 40.00 decimal odds mean?
Decimal odds of 40.00 return 40.00 for every 1.00 staked, including the stake, so the profit is 40.00 minus 1. The implied probability is 2.50%.
What is 40.00 in American odds?
40.00 decimal is +3,900 in American odds. Prices of 2.00 and above convert with (decimal − 1) × 100; prices below 2.00 with −100 / (decimal − 1).
What is 40.00 as a fraction?
40.00 is 39/1 in fractional odds: subtract 1 from the decimal price and express the result as a fraction.
How much does 100 return at 40.00?
100 × 40.00 = 4,000.00 total return, of which 3,900.00 is profit.
What win rate breaks even at 40.00?
1 / 40.00 = 2.50%. Win more often than that and the price is profitable; the bookmaker's margin means both sides of a market usually sit a little under fair.