Odds explained · even money
+100 odds (even money): payout and meaning
+100 is even money (evens, 1/1, decimal 2.00): a winning bet doubles your stake. A $100 bet wins $100.00 and returns $200.00.
+100 payout chart
| Stake | Profit if it wins | Total payout |
|---|---|---|
| $10 | $10.00 | $20.00 |
| $20 | $20.00 | $40.00 |
| $25 | $25.00 | $50.00 |
| $50 | $50.00 | $100.00 |
| $100 | $100.00 | $200.00 |
| $200 | $200.00 | $400.00 |
| $500 | $500.00 | $1,000.00 |
| $1,000 | $1,000.00 | $2,000.00 |
Payout = stake + profit. A losing bet loses the stake; a push (tie, where offered) returns it. In pounds: £100 wins £100.00. Any stake: bet calculator.
How much to bet to win a set amount at +100
| To win (profit) | Stake needed |
|---|---|
| $10 | $10.00 |
| $50 | $50.00 |
| $100 | $100.00 |
| $500 | $500.00 |
Break-even win rate at +100
The implied probability of +100 is about 50.00% (1 ÷ the exact decimal odds, shown rounded). That is the break-even win rate: if you bet this price many times on win-or-lose bets, you need to win more often than that to come out ahead. Whether a +100 bet is good value depends only on whether your honest estimate of the chance beats that number — the EV calculator does the comparison.
+100 in a parlay
Two +100 legs parlayed combine to decimal odds of 4.00 (+300): a $100 two-leg parlay pays $400.00 if both win. Three legs: decimal 8.00 (+700), paying $800.00 on $100. For independent selections from different events, those prices imply a break-even chance of about 12.50% for all three winning — an implied figure that includes each price’s margin, not a forecast; bookmakers may refuse or reprice related selections. Payouts use the exact, unrounded combined odds. Build your own with the parlay calculator.
Compare nearby odds
| Odds | Fractional | Decimal | Implied probability | $100 wins |
|---|---|---|---|---|
| −110 | 10/11 | 1.91 | 52.38% | $90.91 |
| −105 | 20/21 | 1.95 | 51.22% | $95.24 |
| +100 | 1/1 | 2.00 | 50.00% | $100.00 |
| +110 | 11/10 | 2.10 | 47.62% | $110.00 |
| +120 | 6/5 | 2.20 | 45.45% | $120.00 |
Full betting odds chart → · How betting odds work · 18+ — odds describe a price, not a prediction or a recommendation to bet.