How do I convert decimal odds to fractional odds?

To convert decimal odds to fractional, subtract 1 from the decimal value and express it as a fraction. For example, 2.50 decimal = 3/2 fractional (2.50 − 1 = 1.50 = 3/2).

What is implied probability in betting?

Implied probability is the bookmaker's estimated chance of an outcome occurring, derived from the odds. For decimal odds of 2.00, implied probability = 1 ÷ 2.00 = 50%.

How do I calculate potential winnings?

For decimal odds: multiply your stake by the decimal odds. A £10 bet at 2.50 returns £25 (£15 profit). For fractional odds: multiply stake by the fraction and add your stake back.

What are American (moneyline) odds?

American odds show how much you win on a $100 base stake. Positive odds (+150) mean you win $150 profit on $100. Negative odds (−200) mean you must bet $200 to win $100 profit.

What is expected value (EV) in sports betting?

Expected value measures long-term profitability. Positive EV (+EV) means a bet is theoretically profitable over time. EV = (Probability × Profit) − (1 − Probability) × Stake.