How to Read Betting Odds: A Step-by-Step Guide

You've opened DraftKings or FanDuel for the first time, and you're staring at a screen full of numbers, pluses, minuses, and fractions. Where do you even start?

This guide will walk you through exactly how to read betting odds on major sportsbooks, step by step. We'll use real screenshots and examples so you know precisely what you're looking at—and more importantly, what it means for your wallet.

Step 1: Identify the Sport and Game

Every sportsbook organizes their odds board differently, but the fundamentals are the same.

What you'll see:

• Sport category (NFL, NBA, MLB, etc.)
• Date and time of the game
• Team names (home team usually listed second or on the right)
• Various bet types for that game

Example from DraftKings:

NBA - Tonight 7:00 PM ET
Los Angeles Lakers @ Boston Celtics

The "@" symbol means "at"—the Lakers are visiting the Celtics in Boston. Some books highlight the home team or use different colors.

Step 2: Locate the Main Bet Types

Most sportsbooks display three primary betting options for each game:

1. Spread (point spread)
2. Total (over/under)
3. Moneyline (straight-up winner)

How They're Displayed on Major Sportsbooks

DraftKings Layout: Typically uses a three-column format with tabs or sections:

• Left column: Team names
• Middle column: Spread and odds
• Right column: Total and odds
• Separate area: Moneyline

FanDuel Layout: Often displays all three bet types in a compact row:

• Team name | Spread odds | Total odds | Moneyline odds

BetMGM Layout: Similar to FanDuel but with slightly different spacing and sometimes shows more alternative lines upfront.

Step 3: Reading the Moneyline

The moneyline is the simplest bet to read: pick who wins, period.

What the Numbers Mean

Visual Example:

Lakers  +140
Celtics -165

How to read it:

• Lakers +140 = Underdog. Bet $100 to win $140.
• Celtics -165 = Favorite. Bet $165 to win $100.

Step-by-Step Calculation

If you want to bet $50 on the Lakers (+140):

1. Positive odds mean profit per $100 wagered
2. $50 is half of $100, so you'd win half of $140 = $70
3. Total return: $50 (stake) + $70 (profit) = $120

If you want to bet $50 on the Celtics (-165):

1. Negative odds mean amount needed to win $100
2. Set up ratio: $165 → $100, so $50 → $X
3. X = (50 × 100) ÷ 165 = $30.30
4. Total return: $50 (stake) + $30.30 (profit) = $80.30

Quick Reference Table

Moneyline	Bet $100	Bet $50	Bet $20
+100	Win $100	Win $50	Win $20
+150	Win $150	Win $75	Win $30
+200	Win $200	Win $100	Win $40
-110	Win $90.91	Win $45.45	Win $18.18
-150	Win $66.67	Win $33.33	Win $13.33
-200	Win $50	Win $25	Win $10

Step 4: Reading the Point Spread

The spread evens out mismatched teams by giving the underdog a head start.

What You'll See

Visual Example:

Lakers    +5.5 (-110)
Celtics   -5.5 (-110)

Breaking it down:

• Lakers +5.5 = Lakers get a 5.5 point head start
• Celtics -5.5 = Celtics must win by 6+ points
• (-110) = The price you pay (the juice/vig)

The Half-Point (.5) Explained

Half-points eliminate ties. You can't score half a point in basketball, so:

• If Celtics win 108-103 (5 point margin), Lakers +5.5 wins
• If Celtics win 109-103 (6 point margin), Celtics -5.5 wins

No pushes, no refunds—someone always wins.

How to Know if Your Bet Won

Step-by-step:

1. Find the final score
2. Apply the spread to the underdog's score (or subtract from favorite)
3. Compare the adjusted scores

Example: Lakers +5.5

Final score: Celtics 112, Lakers 108

1. Lakers actual score: 108
2. Add the spread: 108 + 5.5 = 113.5
3. Compare: 113.5 > 112
4. Result: Lakers +5.5 wins!

Example: Celtics -5.5

Same game:

1. Celtics actual score: 112
2. Subtract the spread: 112 - 5.5 = 106.5
3. Compare: 106.5 < 108
4. Result: Celtics -5.5 loses

Step 5: Understanding the Juice/Vig

Notice both sides of the spread show (-110)? That's not a coincidence.

What is Juice?

The juice (also called vig or vigorish) is the sportsbook's commission. It's why you bet $110 to win $100 instead of $100 to win $100.

Standard spread odds:

Team A  -5.5 (-110)
Team B  +5.5 (-110)

You must risk $110 to win $100 on either side.

Break-even calculation:

• You need to win 52.4% of bets to break even at -110
• Win rate formula: 110 ÷ (110 + 100) = 52.4%

When the Juice Changes

Sometimes you'll see different juice on each side:

Cowboys  -3.5 (-115)
Giants   +3.5 (-105)

This means:

• Cowboys bettors must risk $115 to win $100
• Giants bettors must risk $105 to win $100

The sportsbook is charging more for the Cowboys because they're getting heavier action on that side. This is how they balance their books.

How Much the Juice Costs You

Over 100 bets of $100 each at -110:

• If you win 50%: -$476 (you need 52.4%)
• If you win 52.4%: Break even
• If you win 55%: +$476 profit

That 2.4% gap between 50% and 52.4% is the sportsbook's edge. It's significant.

Step 6: Reading Over/Under (Totals)

Totals betting means wagering on the combined score of both teams.

What You'll See

Visual Example:

O 224.5 (-110)
U 224.5 (-110)

This means:

• The sportsbook expects 224-225 total points scored
• Bet Over if you think the combined score will be 225+
• Bet Under if you think it will be 224 or fewer
• Both cost -110 (risk $110 to win $100)

Step-by-Step: Did My Total Win?

You bet Over 224.5

Final score: Celtics 118, Lakers 109

1. Add both scores: 118 + 109 = 227
2. Compare to total: 227 > 224.5
3. Result: Over wins!

You bet Under 224.5

Final score: Celtics 110, Lakers 108

1. Add both scores: 110 + 108 = 218
2. Compare to total: 218 < 224.5
3. Result: Under wins!

Hook Numbers (.5) in Totals

Like spreads, most totals include a half-point to avoid pushes. If you see a whole number (like 224.0), a tie is possible:

• Over/Under 224.0
• Final score totals exactly 224
• Result: Push - you get your money back, no win or loss

Step 7: Alternative Lines and Props

Once you master the main three bets, sportsbooks offer many variations.

Alternate Spreads

Most books let you buy or sell points in exchange for different odds.

Standard line:

Celtics -5.5 (-110)

Alternate lines:

Celtics -3.5 (-185)  ← Easier to win, worse payout
Celtics -7.5 (+130)  ← Harder to win, better payout

If you're confident the Celtics will blow out the Lakers, taking -7.5 at +130 gives you better value. If you want a safer bet, -3.5 is more likely to hit but costs more.

Alternate Totals

Same concept:

Standard:

O 224.5 (-110)

Alternatives:

O 220.5 (-155)  ← More likely, worse odds
O 228.5 (+135)  ← Less likely, better odds

Step 8: Common Display Mistakes Beginners Make

Mistake #1: Mixing Up Home and Away

Different sportsbooks list teams differently:

• Some show home team on bottom
• Some show home team on right
• Some highlight home team in bold

Always check before betting. A bet on "Lakers -5.5" is very different from "Lakers +5.5"!

Mistake #2: Ignoring the Timestamp

Odds update constantly. What you saw 10 minutes ago might not be available now.

What happens:

• You research Lakers +6.5 in the morning
• You place bet 3 hours later
• Line has moved to +5.5
• Your bet is +5.5, not +6.5

Pro tip: Major sportsbooks show you the current odds before confirming your bet. Always double-check.

Mistake #3: Confusing Spread and Moneyline

This can be expensive:

You think you're betting on the Celtics to win (moneyline -165) but accidentally click the spread (Celtics -5.5 at -110).

The Celtics win 108-105 (3 points).

• Moneyline bet: ✅ Wins
• Spread bet: ❌ Loses

Always verify which bet type you're placing.

Mistake #4: Not Understanding "Push" Rules

When there's no half-point and the result lands exactly on the number:

• Spread of -7, final margin is 7: Push
• Total of 215, combined score is 215: Push

You get your stake back. It's not a win or a loss. Some beginners panic thinking they lost.

Mistake #5: Parlays Without Understanding the Math

Sportsbooks make parlays very prominent because they're profitable for the house.

A typical 2-team parlay:

• Both bets at -110
• Pays approximately +260 (2.6 to 1)

The math:

• True odds of hitting both: 0.524 × 0.524 = 27.4% (should pay +265)
• Actual payout: +260
• The gap is the sportsbook's extra edge

Parlays are fun but mathematically worse than straight bets.

Step 9: Reading a Live Betting Board

Live betting (in-game wagering) changes odds in real-time as the game unfolds.

What's Different

Pre-game:

Lakers +5.5 (-110)

Live (middle of 2nd quarter, Celtics up 8):

Lakers +12.5 (-115)
Celtics -12.5 (-105)

The spread adjusts based on current score, game flow, and remaining time.

Reading Live Odds

Same principles apply:

1. Check the spread/moneyline/total
2. Check the juice
3. Calculate your potential return
4. Place bet quickly (odds change every few seconds)

Important: Live odds move fast. Your bet might be rejected if odds change before confirmation.

Step 10: Comparing Odds Across Sportsbooks

The same game can have different odds at different sportsbooks.

Real Example:

Sportsbook	Lakers Spread	Odds
DraftKings	+5.5	-110
FanDuel	+5.5	-108
BetMGM	+6.0	-112

Best bet: BetMGM at +6.0 (-112) gives you an extra half-point. Even though the juice is slightly worse (-112 vs -110), the extra half-point is usually worth more.

Line Shopping Saves Money

Getting -105 instead of -110 might seem trivial, but:

• 100 bets of $110 at -110 = risk $11,000 to win $10,000
• 100 bets of $105 at -105 = risk $10,500 to win $10,000

You're risking $500 less for the same potential profit.

State-by-State Differences

If you're in a legal sports betting state, note that:

• Available sportsbooks vary (not all states have all books)
• Odds are the same across states on the same sportsbook
• Promos differ by state (New York promos ≠ New Jersey promos)

Responsible Betting Checklist

Before placing any bet, ask yourself:

• Do I understand which bet I'm placing? (spread/total/moneyline)
• Do I know my exact potential profit?
• Have I checked odds at multiple sportsbooks?
• Is the juice reasonable, or am I overpaying?
• Am I betting within my predetermined budget?

Quick Reference: Reading Odds at a Glance

What You See	What It Means	Example
Team with - (minus)	Favorite	-150 = bet $150 to win $100
Team with + (plus)	Underdog	+130 = bet $100 to win $130
Spread with -	Must win by more than this	-7.5 = win by 8+
Spread with +	Gets this many points	+7.5 = can lose by 7 or fewer
O/U number	Total points expected	225.5 = over or under this total
(-110)	Standard juice	Bet $110 to win $100
(-105)	Better odds	Bet $105 to win $100
(-120)	Worse odds	Bet $120 to win $100

Next Steps

Now that you can read odds confidently:

1. Open accounts at 2-3 major sportsbooks for line shopping
2. Practice with small bets to build confidence
3. Track your bets in a spreadsheet (seriously—it's eye-opening)
4. Focus on one sport initially until you understand its betting patterns
5. Learn bankroll management before increasing your bet sizes

Reading odds is the first step. Understanding value, managing your bankroll, and staying disciplined are what separate winning bettors from losing ones.

Most importantly: if the numbers on the screen still confuse you, don't bet until they make sense. There's no shame in paper trading (tracking bets without real money) until the mechanics click. Better to learn for free than pay tuition to the sportsbook.