Odds Translator
Convert between prediction market cents and sportsbook odds formats instantly. Translate PM contract prices to American, decimal, and fractional odds, or convert sportsbook lines to prediction market prices.
Prediction Market
¢
50¢
50% implied probability
$200.00 payout per $100
equals
Sportsbook
+100
Decimal: 2.00 | Fractional: 1/1
$200.00 payout per $100
All Formats
PM Cents50¢
American+100
Decimal2.00
Fractional1/1
Implied Probability50.0%
Vig Comparison
Prediction Markets
1-3%
Typical overround on binary contracts
Sportsbooks
4-10%
Typical vig on standard betting lines
PM Cents = Probability
A prediction market contract priced at 65¢ means the market assigns roughly a 65% probability to that outcome. You pay the price and receive $1.00 if the event happens. The price is the implied probability.
Sportsbook Odds = Payout Ratio
American odds like +150 mean you profit $150 on a $100 bet. Negative odds like -200 mean you must risk $200 to profit $100. Both encode the same underlying probability, just with more vig baked in.
Frequently Asked Questions
How do prediction market prices relate to sportsbook odds?
A prediction market contract priced at X cents implies an X% probability. This directly maps to sportsbook odds: 50 cents equals +100 (even money), 33 cents equals +200, and 75 cents equals -300. Both systems express the same underlying probability, just in different formats.
What are American odds and how do they work?
American odds use positive and negative numbers. Positive odds like +150 mean you profit $150 on a $100 bet. Negative odds like -200 mean you must risk $200 to profit $100. The breakpoint is +100 / -100, which equals a 50% implied probability or 50 cents in PM terms.
What are decimal odds?
Decimal odds represent the total payout per dollar wagered, including your stake. Decimal 2.50 means a $1 bet returns $2.50 total ($1.50 profit plus your $1 stake). To convert from PM cents: decimal odds = 100 / cents. A 40-cent contract equals 2.50 decimal odds.
What are fractional odds?
Fractional odds like 3/2 mean you profit $3 for every $2 wagered. They are most common in UK betting markets. A 40-cent PM contract (decimal 2.50) converts to 3/2 fractional odds. The fraction represents net profit relative to stake.
Why do prediction markets typically have lower vig than sportsbooks?
Prediction markets operate as exchanges where users trade against each other, similar to a stock exchange. The platform only charges a small transaction fee. Sportsbooks set their own lines and profit from the spread between the two sides, resulting in higher built-in margins typically between 4-10%.
How do I compare a sportsbook line to a prediction market price?
Convert both to implied probability. If a sportsbook has an event at -150 (60% implied) and a prediction market prices it at 55 cents (55% implied), the PM price implies a lower probability. The difference may represent a trading opportunity or reflect different information.
What is vig or juice in odds?
Vig (vigorish) or juice is the margin built into odds by a sportsbook. If both sides of a binary event sum to more than 100% implied probability, the excess is the vig. For example, -110 on both sides implies 52.4% each, totaling 104.8% — the 4.8% excess is the vig.
Can I use this tool for live arbitrage between markets and sportsbooks?
This tool converts formats so you can compare prices apples-to-apples. For real-time arbitrage detection across platforms, use the Odds Reference live dashboard which monitors prices across Kalshi, Polymarket, and other platforms continuously.