How to Bet on Sports: A Beginner's Guide

How sports betting works

At its core, sports betting is simple: you place a wager on the outcome of a sporting event. If your prediction is correct, you win money. If it's wrong, you lose your stake.

Sportsbooks (also called bookmakers or books) set odds for every possible outcome. These odds determine two things: the implied probability of that outcome happening, and how much you'll be paid if it does. The sportsbook builds a small margin into the odds — called the vig or juice — which is how they make money regardless of outcomes.

In the United States, legal online sportsbooks operate on a state-by-state basis. You'll need to be physically located in a state where sports betting is legal. Most books offer sign-up bonuses, but the real key to long-term success isn't promotions — it's understanding value. That starts with learning how to read odds.

Common bet types explained

Every sportsbook offers the same core bet types. Understanding each one is the foundation of smart betting.

• Moneyline: The simplest bet — pick who wins the game. No point spread involved. A favorite might be listed at -180 (bet $180 to win $100) while the underdog sits at +155 (bet $100 to win $155).
• Point Spread: The sportsbook sets a margin of victory. If the Chiefs are -6.5, they need to win by 7 or more for your bet to cash. Spreads are designed to get roughly equal action on both sides.
• Totals (Over/Under): Bet on whether the combined score of both teams will be over or under a set number. For example, an NBA total might be set at 224.5 — you bet on whether the final combined score goes above or below that.
• Player Props: Wagers on individual player performance — like whether a quarterback throws over 275.5 passing yards, or if a basketball player scores over 22.5 points. Props are where many pricing inefficiencies exist.
• Parlays: Combining multiple bets into one wager. All legs must hit for the parlay to pay out, but the combined odds are higher. Most parlays are -EV, but certain strategies can make them worthwhile.

Understanding odds and payouts

American odds are displayed as positive or negative numbers. Negative odds (like -150) tell you how much you need to bet to win $100. Positive odds (like +130) tell you how much you win on a $100 bet. The bigger the negative number, the heavier the favorite.

Every set of odds implies a probability. At -150, the sportsbook is saying this outcome has roughly a 60% chance of happening (though the true probability is slightly lower once you account for the vig). Understanding this conversion is essential — it's how you start identifying positive expected value.

For a deeper breakdown of odds formats and how to convert between them, see our full guide on how to read betting odds.

Bankroll management basics

Your bankroll is the total amount of money you've set aside specifically for betting. It should be money you can afford to lose entirely — not rent, not savings, not money earmarked for anything else.

The most common mistake beginners make is betting too much on individual wagers. Even the best bettors go through losing streaks. If you're betting 20% of your bankroll per game, a streak of five losses wipes you out. A good starting rule: never risk more than 1-5% of your bankroll on a single bet.

More sophisticated bettors use the Kelly criterion to size their bets based on edge and odds. The Kelly formula determines the mathematically optimal bet size to maximize long-term bankroll growth while minimizing the risk of ruin. DawBets calculates suggested wager sizes for every bet using fractional Kelly.

The right mindset: math over gut feel

Recreational bettors pick games based on team loyalty, recent results, or a "feeling." This approach guarantees the sportsbook wins over time because every bet carries a built-in margin against you.

Profitable bettors think differently. They don't ask "will this team win?" They ask "is this price good enough?" A team might have a 55% chance of winning, but if the odds imply 60%, that bet is -EV regardless of whether the team actually wins. Conversely, a team you think will lose might still be a great bet if the odds are generous enough.

This is the core shift: you're not betting on outcomes, you're betting on prices. When a sportsbook's price implies a lower probability than reality, you have an edge. Finding those edges consistently is what expected value betting is all about — and it's exactly what DawBets automates.

Frequently asked questions