Moneyline Odds Calculator — Implied Probability & Payout
Enter a moneyline (American odds) and your wager to instantly see the implied win probability, decimal and fractional odds equivalents, and the profit and total payout if your bet wins.
Favourite — bookmaker implies this team/player wins more than 50%
- 1
Absolute moneyline (favourite)
|ML| = 110 - 2
Implied probability
110 ÷ (110 + 100) × 100 = 52.38A negative moneyline: you must bet |ML| to profit $100. - 3
Decimal odds
100 ÷ 110 + 1 = 1.9091
How does this calculator work?
Moneyline odds use $100 as reference: a negative line (−150) is the favourite — bet $150 to profit $100; a positive line (+200) is the underdog — bet $100 to profit $200. Implied probability: −150 → 60% win chance; +200 → 33.3%. Multiply wager × decimal odds for total payout.
Formula
How this is calculated
American moneyline odds use a $100 reference stake. A negative number (e.g. −150) means you must wager that much to profit $100 — it marks the favourite. A positive number (e.g. +200) means a $100 wager profits that amount — it marks the underdog. For a −150 line, you wager $150 to win $100; the implied probability is 150 ÷ (150 + 100) = 60%. For +200, a $100 wager wins $200; implied probability = 100 ÷ (200 + 100) = 33.3%.
Decimal odds (common in Europe and Australia) = total return per unit staked, including the stake itself. Fractional odds (common in the UK) show profit relative to stake (e.g. 2/1 means $2 profit per $1 staked). All three formats carry the same information — this calculator converts between them automatically.
Implied probability is the bookmaker's estimate of the outcome's likelihood embedded in the price. In practice, the sum of implied probabilities across all outcomes of an event exceeds 100% — the difference is the bookmaker's margin (vig or juice). This calculator shows single-outcome implied probability; it does not adjust for vig.
Frequently asked questions
A negative moneyline (e.g. −150) identifies the favourite. The number shows how much you must bet to win $100 profit. −150 means you risk $150 to profit $100, for a total return of $250. The implied win probability is 150 ÷ 250 = 60%.
A positive moneyline (e.g. +200) identifies the underdog. The number shows how much you profit on a $100 bet. +200 means a $100 wager returns $300 total ($200 profit + $100 stake back). The implied win probability is 100 ÷ 300 ≈ 33.3%.
For positive moneylines: decimal odds = (ML ÷ 100) + 1. For negative: decimal odds = (100 ÷ |ML|) + 1. Example: +200 → 3.00; −150 → 1.667. Multiply decimal odds by your stake to get total return (stake included).
Also known as
TG we-Calculate Editorial Team. (2026). Moneyline Odds Calculator — Implied Probability & Payout [Online calculator]. TG we-Calculate. https://we-calculate.com/calculator/moneyline-odds-calculator
TG we-Calculate Editorial Team. "Moneyline Odds Calculator — Implied Probability & Payout." TG we-Calculate. 2026. https://we-calculate.com/calculator/moneyline-odds-calculator.
TG we-Calculate Editorial Team, "Moneyline Odds Calculator — Implied Probability & Payout," TG we-Calculate, 2026. [Online]. Available: https://we-calculate.com/calculator/moneyline-odds-calculator
@misc{wecalculate_moneyline_odds_calculator, title = {Moneyline Odds Calculator — Implied Probability & Payout}, author = {{TG we-Calculate Editorial Team}}, howpublished = {\url{https://we-calculate.com/calculator/moneyline-odds-calculator}}, year = {2026}, note = {TG we-Calculate} }
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