Decimal Odds
Calculate decimal odds from betting chances. Get implied probability, gross return, net profit, and probability charts. Free online decimal odds converter for any stake.
About This Calculator
The Decimal Odds Calculator converts betting chances into decimal odds, the standard odds format used in continental Europe, Australia, Canada, and New Zealand. Decimal odds represent the total payout (stake plus profit) per unit wagered — for example, decimal odds of 2.50 mean you receive 2.50 units back for every 1 unit staked. This calculator also computes the implied probability of winning and losing, and with an optional stake input it calculates the gross return and net profit for any bet size.
The calculation is based on the standard formula for decimal odds: Decimal Odds = (Chances for Success + Chances Against Success) / Chances for Success. The probability of winning is Chances for Success divided by Total Chances. The gross return is Stake × Decimal Odds, and the net profit is Gross Return minus Stake. Additional metrics include the probability of consecutive wins or losses, useful for understanding streak probabilities in betting scenarios.
Global Usage of Decimal Odds
Europe, Australia, New Zealand, Canada: Decimal odds are the default format used by most online bookmakers and betting exchanges. They are preferred for their simplicity — the odds number directly tells you the total return per unit stake. For example, odds of 1.50 mean a 50% return on stake.
United Kingdom and Ireland: Fractional odds (e.g., 6/4) are more common at traditional bookmakers, though decimal odds are widely available on betting exchanges and online platforms. Many UK bettors convert between the two formats.
United States: American moneyline odds (positive/negative numbers) are standard. Decimal odds are less common but are used by some online sportsbooks and are easy to convert — simply subtract 1 from decimal odds and multiply by 100 for positive American odds, or divide -100 by (decimal odds minus 1) for negative American odds.
Understanding decimal odds helps bettors compare value across different bookmakers and formats, assess implied probability, and calculate potential returns before placing a bet.
Frequently Asked Questions
What are decimal odds?
Decimal odds are a format used by bookmakers to represent betting odds. They show the total payout (including your original stake) per unit wagered. For example, decimal odds of 3.00 mean you receive 3 units back for every 1 unit staked — 2 units profit plus your original 1 unit stake.
How do I calculate decimal odds from probability?
To calculate decimal odds, divide the total number of outcomes by the number of winning outcomes: Decimal Odds = (Chances for Success + Chances Against Success) / Chances for Success. For example, if an event has 5 chances of success and 1 chance against, the decimal odds are (5+1)/5 = 1.20.
How do I calculate my return from decimal odds?
Multiply your stake by the decimal odds to get your gross return: Return = Stake × Decimal Odds. For example, a 100 stake at decimal odds of 2.50 gives a gross return of 250. Your net profit is the return minus your original stake: 250 - 100 = 150.
What is the difference between decimal and fractional odds?
Decimal odds (used in continental Europe, Australia, Canada) show total return including stake, expressed as a single number like 2.50. Fractional odds (used in the UK) show net profit relative to stake, expressed as a fraction like 6/4. Decimal odds of 2.50 are equivalent to fractional odds of 6/4.
How do decimal odds compare to American odds?
American odds (used in the US) show how much you need to stake to win 100 (for favorites, shown as negative numbers) or how much you win from a 100 stake (for underdogs, shown as positive numbers). Decimal odds of 2.50 equal American odds of +150. Decimal odds of 1.50 equal American odds of -200.
What does an implied probability mean in decimal odds?
Implied probability is the likelihood of an outcome as suggested by the decimal odds. It is calculated as (1 / Decimal Odds) × 100%. For decimal odds of 2.00, the implied probability is 50%. Bookmakers add a margin (overround) so the sum of implied probabilities exceeds 100%.
What is the formula for calculating net profit from decimal odds?
Net Profit = (Stake × Decimal Odds) - Stake, or equivalently Stake × (Decimal Odds - 1). For a 50 stake at decimal odds of 4.00, the net profit is 50 × (4.00 - 1) = 150. The gross return would be 200.
What is the probability of winning given chances for and against?
The probability of winning is calculated as Chances for Success divided by Total Chances (chances for plus chances against). For example, with 5 chances for and 1 against, the probability of winning is 5/(5+1) = 83.33%. The probability of losing is 1/(5+1) = 16.67%.