slipmath.

Odds explained · odds-on price

−500 odds: payout and meaning

A minus sign means an odds-on price, the kind usually offered on the favorite. −500 means you have to stake $500.00 to win $100 in profit; a $100 bet wins $20.00 and returns $120.00 including your stake.

−500 at a glanceexact math, no bookmaker margin added
American−500
Fractional1/5
Decimal1.20
Implied probability83.33%
$100 wins$20.00
To win $100, stake$500.00

−500 payout chart

StakeProfit if it winsTotal payout
$10$2.00$12.00
$20$4.00$24.00
$25$5.00$30.00
$50$10.00$60.00
$100$20.00$120.00
$200$40.00$240.00
$500$100.00$600.00
$1,000$200.00$1,200.00

Payout = stake + profit. A losing bet loses the stake; a push (tie, where offered) returns it. In pounds: £100 wins £20.00. Any stake: bet calculator.

How much to bet to win a set amount at −500

To win (profit)Stake needed
$10$50.00
$50$250.00
$100$500.00
$500$2,500.00

Break-even win rate at −500

The implied probability of −500 is about 83.33% (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 −500 bet is good value depends only on whether your honest estimate of the chance beats that number — the EV calculator does the comparison.

−500 in a parlay

Two −500 legs parlayed combine to decimal odds of 1.44 (≈ −227, rounded): a $100 two-leg parlay pays $144.00 if both win. Three legs: decimal ≈ 1.73 (−137, rounded), paying $172.80 on $100. For independent selections from different events, those prices imply a break-even chance of about 57.87% 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

OddsFractionalDecimalImplied probability$100 wins
−10001/101.1090.91%$10.00
−5001/51.2083.33%$20.00
−4001/41.2580.00%$25.00
−3001/31.3375.00%$33.33
−2502/51.4071.43%$40.00

Full betting odds chart → · How betting odds work · 18+ — odds describe a price, not a prediction or a recommendation to bet.

FAQ

Frequently asked questions

What do −500 odds mean?

A minus sign means an odds-on price, the kind usually offered on the favorite. −500 means you have to stake $500.00 to win $100 in profit; a $100 bet wins $20.00 and returns $120.00 including your stake.

How much does a $100 bet at −500 pay?

It wins $20.00 in profit. With your $100 stake back, the total payout is $120.00. A $10 bet wins $2.00.

What is the implied probability of −500?

About 83.33% (rounded): 1 ÷ the exact decimal odds. It is also the win rate you need just to break even at this price over many win-or-lose bets. Bookmaker prices include a margin, so the market’s fair estimate is usually a little lower.

What is −500 in fractional and decimal odds?

Fractional 1/5, and decimal 1.20 (rounded to two places). They describe the same price. The odds converter switches between formats for any value.

Does −500 mean favorite?

Usually, but not by definition. −500 is odds-on: the profit is less than the stake and the price implies more than 50% (about 83.33%). Who is the favorite depends on the other prices: both sides of a market can be odds-on at once (for example −110 / −110) because of the bookmaker’s margin.