Betting Tools

Enter any odds value into one of the four fields — American (moneyline), decimal, fractional, or implied probability — and every other format updates instantly. There's no button to press; the conversion happens in real time as you type. It works with pre-game odds, live in-play odds, and any sport.

American odds (also called moneyline odds) use positive and negative numbers. Positive odds like +200 mean you profit $200 on a $100 bet. Negative odds like -150 mean you must wager $150 to profit $100. They are the standard format used by U.S. sportsbooks.

If the decimal odds are 2.00 or higher, use: American = (Decimal − 1) × 100. For example, 2.75 becomes +175. If the decimal is below 2.00, use: American = −100 / (Decimal − 1). For example, 1.50 becomes −200. Or simply type the decimal value into our converter and read the American result.

Implied probability converts odds into a percentage representing the bookmaker's estimated likelihood of an outcome. For -200 odds, the implied probability is 66.7%. For +300 odds, it's 25%. Comparing implied probability to your own assessment helps identify value bets where the true chance exceeds what the odds suggest.

A -110 line is the standard vig (juice) charged by most sportsbooks on spread bets and totals. It means you need to wager $110 to win $100 in profit. The extra $10 is the bookmaker's commission. In decimal format, -110 equals 1.909.

Fractional odds (like 7/4) show only your potential profit relative to your stake. Decimal odds (like 2.75) show your total return including the stake. To convert fractional to decimal, divide the fraction and add 1: 7/4 = 1.75 + 1 = 2.75.

Decimal odds are widely considered the most beginner-friendly format because the number directly represents your total return per dollar staked. A decimal of 3.00 means $3 back for every $1 bet. American odds are essential if you bet with U.S. sportsbooks, while fractional odds are traditional in the UK.

After entering odds in the converter, the payout calculator shows how much you'd win on common stake amounts ($1, $20, $50, $100). You can also type any custom dollar amount to see the exact profit and total return. The calculation uses: Total Return = Stake × Decimal Odds, and Profit = Total Return − Stake.

For positive American odds: Profit = (Odds / 100) × Stake. So +250 with a $50 bet = $125 profit ($175 total). For negative odds: Profit = (100 / |Odds|) × Stake. So -150 with a $75 bet = $50 profit ($125 total). Our payout calculator does this math for you instantly.

Yes. Below the preset amounts ($1, $20, $50, $100), there's a custom bet field where you can type any dollar amount. The calculator will instantly show your profit and total return for that specific stake.

Even money means the payout equals your stake — you double your money. In American format it's +100, in decimal it's 2.00, and in fractional it's 1/1 (also called 'evens'). The implied probability is exactly 50%. A $100 even money bet returns $200 total ($100 profit).

Add two or more legs by entering the odds for each individual bet. You can mix odds formats — American, decimal, and fractional — on different legs. The calculator multiplies the decimal equivalents of all legs together to compute the combined parlay odds, then shows the total payout and profit for your chosen stake.

A parlay (also called an accumulator or multi-bet) combines two or more individual selections into one wager. All selections must win for the parlay to pay out. The combined odds multiply together, creating a much larger potential return from a smaller stake — but the risk increases because a single losing leg busts the entire parlay.

Yes. Each leg in our parlay calculator has its own format toggle (US, Decimal, Fractional). Enter each leg's odds in whatever format your sportsbook displays them. The calculator converts everything to decimal behind the scenes and multiplies them together for the final result.

Parlay odds are calculated by converting every leg to decimal format and multiplying them together. For example, a 3-leg parlay with decimal odds of 2.00, 1.50, and 3.00 gives combined odds of 2.00 × 1.50 × 3.00 = 9.00. A $10 stake at 9.00 returns $90 total ($80 profit).

Our parlay calculator has no built-in limit — add as many legs as you need. Keep in mind that most sportsbooks cap parlays at 10–15 legs, and each additional selection lowers your overall probability of winning.

The vig (vigorish), also called juice, is the bookmaker's built-in commission. It's why both sides of a bet might be priced at -110 instead of +100. A standard vig on spread bets is around 4.5–5%, reflected in the -110 pricing on both sides.

Each bookmaker sets odds based on their own risk models, betting volume, and profit margins. Shopping for the best odds across multiple sportsbooks — known as 'line shopping' — is one of the most effective strategies in sports betting.

Yes. The odds converter, payout calculator, and parlay calculator all work with any odds value — whether it's a pre-game line or a live in-play price. Simply enter the odds shown by your sportsbook.

For decimal: (1/Decimal)×100. For positive American: 100/(American+100)×100. For negative American: |American|/(|American|+100)×100. For fractional (A/B): B/(A+B)×100.

Yes. The SportBusy odds converter, payout calculator, and parlay calculator are 100% free with no sign-up required. Use them as often as you need for any sport or sportsbook.