How to Read NBA Odds | Simple Betting Guide

Foundational guide Updated August 27, 2026 Written and reviewed by Rech Matane

The Three Core NBA Betting Formats Explained

Before placing a wager on today's NBA games, understanding how bookmakers express risk and reward is vital. The three standard odds formats used across global sportsbooks are:

1. Decimal Odds (Philippine & International Standard)

Decimal odds are the most straightforward format and are used by domestic PAGCOR licensed sportsbooks throughout the Philippines and across Europe. The decimal number represents the total return for every 1 unit staked, including the original wager.

DECIMAL PAYOUT: Total Payout = Stake × Decimal Odds | Net Profit = Stake × (Decimal Odds - 1)

Example: If the Boston Celtics are priced at 1.75, a PHP 1,000 bet yields PHP 1,750 total payout (PHP 750 profit). If the underdog is priced at 2.15, a PHP 1,000 bet yields PHP 2,150 total payout (PHP 1,150 profit).

2. American Odds (Moneyline Format)

Common in North America, American odds use plus (+) and minus (-) signs relative to a $100 baseline:

Minus sign (-): Indicates the favorite. The number shows how much you must risk to win $100 profit (e.g., -150 means bet $150 to win $100).
Plus sign (+): Indicates the underdog. The number shows the net profit earned on a $100 stake (e.g., +130 means bet $100 to win $130).

3. Fractional Odds (Traditional UK Format)

Expressed as a ratio such as 5/2 or 10/11. The numerator represents the profit relative to the denominator stake.

The Three Main NBA Betting Markets

Once you understand odds formats, you can navigate the primary game markets:

1. Moneyline (To Win Outright): The simplest market. You pick which team will win the game outright, regardless of the margin of victory, as detailed in our moneyline vs point spread guide. 2. Point Spread (Margin of Victory): The sportsbook creates an artificial handicap to balance the matchup. The favorite must win by more than the spread (e.g., -5.5 points), while the underdog can lose by up to 5 points or win outright. 3. Over/Under Totals (Combined Points): Wagering on whether the combined final score of both teams will finish above or below a projected number (e.g., 224.5 points), influenced heavily by team tempo in our pace and totals analysis.

Converting Odds to Implied Probability

The most crucial skill in sports betting is converting quoted odds into percentage probabilities to determine whether a line offers genuine value:

IMPLIED PROBABILITY: Probability (%) = (1 / Decimal Odds) × 100

Learn how to remove the bookmaker's commission and find true fair value in our dedicated Implied Probability Masterclass.

SMART BETTING Always Compare Lines Across Sportsbooks

Different sportsbooks offer different prices for the exact same basketball game. Use our free Odds Comparison Engine to always lock in the best available price before placing a bet.