What the Moneyline Actually Means
Look: a moneyline is just a number that tells you how much you win if you pick the right team. It isn’t a spread; it’s a straight-up win-or-lose stake.
Positive vs. Negative Numbers
Positive numbers, like +150, mean a $100 bet yields $150 profit if you’re right. Negative numbers, like -200, demand you risk $200 to net $100.
Step-by-Step Conversion
Here is the deal: you take the raw odds from the sportsbook, then translate them into decimal form for easy multiplication.
Negative Odds to Decimal
Formula: 1 + (100 ÷ absolute value of the negative odds). Example: -250 becomes 1 + (100 ÷ 250) = 1.40. That’s your payout per dollar.
Positive Odds to Decimal
Formula: 1 + (positive odds ÷ 100). Example: +180 becomes 1 + (180 ÷ 100) = 2.80. One dollar turns into $2.80 on a win.
Adjusting for Juice
Bookmakers embed their commission — aka the vig — right into those numbers. To strip it out, you reverse-engineer the implied probability, then rebalance the two sides so they total 100%.
Implied Probability
Negative: 100 ÷ (abs(odds) + 100). Positive: odds ÷ (odds + 100). Plug in -120 → 100 ÷ (120+100) = 45.5%. Plug in +110 → 110 ÷ (110+100) = 52.4%.
Removing the Vig
Add the two implied percentages, divide each by the sum, then flip back to moneyline. If they total 101%, you’re paying a 1% juice. Trim that off and you get the true odds.
Quick Calculator Cheat Sheet
Take the raw line, run it through the appropriate formula, adjust for the vig, and you’ve got the clean price. No need for spreadsheets; a pocket calculator does the trick.
Why It Matters
Because betting on a line that’s artificially inflated kills long-term ROI. You want the pure, un-jacked odds to compare across games, across leagues, across weeks.
Real-World Example
Say the Patriots are -300 and the Seahawks are +250. Convert: Patriots = 1 + (100 ÷ 300) = 1.33; Seahawks = 1 + (250 ÷ 100) = 3.50. Implied probabilities: Patriots 75%, Seahawks 28.6%. Sum = 103.6% → about 3.6% juice. Scale down: Patriots 75 ÷ 103.6 ≈ 72.4%; Seahawks 28.6 ÷ 103.6 ≈ 27.6%. Flip back: Patriots ≈ -385, Seahawks ≈ +270. Those are the cleaned-up moneylines you should be using.
Tools and Resources
Need a one-click solution? Check out the guide at calculate nfl moneyline prices. It walks you through a spreadsheet template and a free web calculator.
Bottom Line
Stop trusting the posted numbers blindly. Convert, de-juice, and you’ll see the true value. Then place bets with confidence, not with guesswork.