Football Betting Guides: Markets, Odds and Probability Explained
Short, numbers-first explanations of football betting markets, odds and probability, written by the ProbaPredict Data Desk. Where it helps, guides include live tables computed from our own match data, refreshed as results come in. Nothing here is a tip or a promise of winnings.
Markets
- What Does Over 2.5 Goals Mean?Over 2.5 goals = three or more goals in 90 minutes; with live league frequencies.
- What Does Over 1.5 Goals Mean?Over 1.5 goals = two or more goals in 90 minutes; with league frequencies.
- What Does Under 2.5 Goals Mean?Under 2.5 goals = two or fewer goals in 90 minutes; with league frequencies.
- What Does BTTS Mean? Both Teams to Score ExplainedBTTS = both teams score at least once; with league BTTS rates.
- What Is 1X2 in Football Betting?1X2 = home win (1), draw (X), away win (2); with league result rates.
- What Is Double Chance in Football Betting?Double chance = two of three results (1X, X2, 12); derived from 1X2.
- What Is Draw No Bet?Draw no bet = stake refunded on a draw; fair odds from 1X2 probabilities.
- How Does Asian Handicap Work?Asian handicap: goal starts that remove the draw; half, whole and quarter lines.
- How Does Correct Score Betting Work?Correct score = exact 90-minute score; with the 10 most common scorelines.
Odds
- How Do Betting Odds Work? Decimal, Fractional and AmericanHow decimal, fractional and American odds show payout and implied probability.
- American Odds Explained: What +150 and -200 MeanAmerican moneyline odds: plus = profit on 100, minus = stake to win 100.
- Fractional Odds Explained: What 5/2 and 10/11 MeanFractional odds: profit relative to stake (5/2, 10/11, evens) with conversions.
- How to Calculate Implied Probability From OddsImplied probability formulas for every odds format, plus removing the margin.
- What Is a Bookmaker's Margin (Overround or Vig)?Bookmaker margin/overround/vig: how to calculate it, with real closing-odds margins.
- What Are Fair Odds?Fair odds = 100 ÷ probability, with no margin; how we calculate ours.
Bet types
- What Is an Accumulator (Acca) Bet?Accumulator (acca): several legs, all must win; odds and probabilities multiply.
- What Is a Parlay in Soccer Betting?Soccer parlay: multiple legs in American odds, all must win; payouts and real odds.
- What Is a Value Bet?Value bet: odds higher than the estimated probability justifies; edge formula.
Analytics
- Expected Goals (xG) ExplainedExpected goals (xG): shot-based vs model-based xG and how predictions use it.
- How Do Football Prediction Models Work?Plain-English guide to our Poisson/Dixon-Coles ratings model, uncertainty and calibration.
- What Does a 60% Chance Really Mean?What a 60% probability means, and how calibration tables test it.
- How Accurate Are Football Predictions?Measuring forecast accuracy (Brier, log loss) with our live record and back-test vs closing odds.
- How Big Is Home Advantage in Football?Home advantage by league and season, plus our model's fitted home factor.
- Which Football League Has the Most Goals?Goals per game and Over 1.5/2.5/3.5 rates by league, this season and last five.
Responsible betting
18+. Only bet what you can afford to lose. Betting budgets and responsible gambling · BeGambleAware.org · GamStop