● 73 terms defined

Gambling terms and betting odds, explained

Plain-English betting definitions, free calculators, and guides that show the math.

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Terms Defined

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Betting Guides

Term of the Day
Leg: One individual selection inside a parlay, teaser, or other multi-bet.
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Free Tools

Betting Calculators

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Leg 1Leg 2Result

Parlay Calculator

Combined odds, payout & win probability for up to 12 legs. American, Decimal, Fractional.

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-1101.9152.4% implied

Odds Converter

Instantly convert American, Decimal, and Fractional odds with implied probability.

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Kelly Calculator

Find the optimal bet size for your edge. Supports full, half, and quarter Kelly.

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Glossary

Popular Terms

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Parlay

Sports Betting

A single bet that links two or more individual wagers for a higher payout. All legs must win.

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Moneyline

Sports Betting

A bet on which team or player will win a game outright, without a point spread.

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Point Spread

Sports Betting

A handicap applied to a game that forces the favorite to win by a specified margin.

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Over/Under (Total)

Sports Betting

A bet on whether the combined score of both teams will be over or under a set number.

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Juice / Vig

Sports Betting

The commission charged by a sportsbook on every bet, built into the odds.

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Implied Probability

General

The win probability implied by a set of odds, including the sportsbook's margin.

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Sample Lines

Today's Featured Odds

Sample lines for educational use only.

NFLToday
TeamSpreadML
Chiefs
-6.5-110
-245▼
Eagles
+6.5-110
+205▲
O/U 48.5▲
NBAToday
TeamSpreadML
Celtics
-4-115
-170▲
Heat
+4-105
+145▼
O/U 212.5▼
MLBToday
TeamSpreadML
Yankees
-1.5+135
-165▼
Sox
+1.5-155
+140▲
O/U 9.5▲

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Learn

Latest Guides

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Point Spread Betting: The Complete Guide
Beginners8 min read

Point Spread Betting: The Complete Guide

The point spread is the most popular bet in American sports, but most bettors don't fully understand how it works. This guide goes from the basics to key numbers and line movement.

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FAQ

Frequently Asked Questions

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