American Odds Explained: How to Read +150, −200 and Everything Between
How American (moneyline) odds work, what plus and minus mean, how to calculate payouts and implied probability, with a quick conversion table.
3 min read
Odds & math guides
American, decimal and implied odds, vig, devigging and the math behind every price.
Break-Even Win Percentage by Odds (Full Table + Formula)
The win rate you need to break even at any odds, from −500 to +500, with the formula, a full table, and what it means for spreads, props and parlays.
3 min read
Decimal Odds Explained (and Why Sharp Bettors Prefer Them)
How decimal odds work, how to calculate returns, convert to American odds and implied probability, and why decimal odds make EV math easy.
3 min read
Fractional Odds Explained: What 5/1, 11/10 and 4/6 Mean
How fractional (UK) odds work, how to calculate profit, and how to convert fractional odds to American, decimal and implied probability, with a table.
3 min read
How to Calculate Vig (Juice) in Sports Betting: Formula and Examples
What vig, juice and overround mean, how to calculate a sportsbook's margin on any market, typical vig by bet type, and how to pay less of it.
3 min read
How to Devig Odds: Multiplicative, Additive, Power and Shin Methods
A practical guide to removing the vig from betting odds: four devig methods with worked examples, when each is best, and why conservative bettors use the worst case.
3 min read
Implied Probability in Betting: Formula, Examples and Why It Matters
How to convert any betting odds to implied probability, why implied probabilities add up to more than 100%, and how to use them to spot value.
3 min read
Moneyline Betting Explained: How It Works and How to Find Value
What a moneyline bet is, how moneyline odds pay, favorites vs underdogs, moneyline vs spread, and how to find value on moneylines across sportsbooks.
3 min read
No-Vig Odds: How to Calculate the Fair Line in 30 Seconds
A fast, practical method to calculate no-vig odds for any two-way or three-way market, with examples for spreads, moneylines, totals and soccer.
3 min read
Over/Under Betting Explained: How Totals Work and How to Bet Them
How over/under (totals) bets work, how sportsbooks set totals, what moves them (weather, pace, injuries), and how to find value on totals and team totals.
3 min read
Point Spread Betting Explained: Covering, Pushes and Key Numbers
How point spreads work, what covering and pushes mean, why spreads move, how half-points change value, and how to bet spreads smarter.
3 min read
Sportsbook Hold Percentage: How Much Each Market Costs You
What hold percentage means, how to calculate theoretical hold on two-way and multi-way markets, typical hold by bet type, and how to use hold to pick better markets.
3 min read
What Do Plus (+) and Minus (−) Mean in Betting Odds?
A simple explanation of plus and minus signs in sports betting odds, what +150 and −150 pay, and how the sign relates to favorites, underdogs and spreads.
3 min read
What Does −110 Mean in Betting? Payouts, Break-Even and Juice
What −110 odds mean, how much a $100 bet pays at −110, why you need to win 52.38% to break even, and how −110 compares to −105 and +100.
3 min read