Betting Tools
Professional calculators to understand odds, spreads, and value. Master the mathematics behind smart betting decisions.
Example:
A -3.5 spread at -110 juice means you need a 52.4% win rate to break even. The favorite would be approximately -197 on the moneyline.
Quick Reference:
-110 = 1.91 decimal = 10/11 fractional = 52.4% break-even
+150 = 2.50 decimal = 3/2 fractional = 40.0% break-even
Value Assessment:
Common Benchmarks:
50% = Even money (+100 or -100)
52.4% = Standard juice (-110)
60% = Strong favorite (-150)
70% = Heavy favorite (-233)
Understanding Betting Odds
Break-Even Percentage
The break-even percentage is how often you need to win to not lose money over time. At standard -110 odds, you need to win 52.4% of your bets to break even. This accounts for the bookmaker's juice (commission).
The Juice (Vigorish)
The "juice" or "vig" is the bookmaker's commission. Standard odds of -110 mean you must bet $110 to win $100. This 10% commission is how sportsbooks make money. The difference between -110 and even money (+100) represents the cost of making a bet.
Spread vs. Moneyline
Point spreads level the playing field by giving the underdog points. Moneyline bets are straight-up wins with no points involved. Generally, favorites require bigger spreads to have moneyline equivalence. For example, a -3 point spread roughly equals -170 on the moneyline.
Key Numbers in NFL Betting
In the NFL, certain margins of victory occur more frequently than others. The number 3 (field goal) is the most common, appearing in about 8% of games. Seven points (touchdown + extra point) appears in about 6% of games. These "key numbers" are especially important when betting spreads.
Finding Value
Value exists when you believe the true probability of an outcome is higher than the implied probability from the odds. If you think a team has a 60% chance to cover, but the odds imply only 52.4% probability, that's a value bet. Our tools help you calculate these probabilities to identify potential value.