Betting Odds Calculator

If you’ve ever wondered, “What does +200 odds mean?” or “If I bet $1,000 how much do I win?” you’re not alone. Understanding betting odds can feel confusing, especially for beginners. That’s why we developed the Betting Odds Calculator a simple, fast, and accurate tool to calculate your potential winnings, implied probability, and even long-term value of a bet.

Whether you’re a casual sports bettor or a seasoned pro, this tool helps you convert moneyline, fractional, or decimal odds into useful information that you can actually use.

What Are Betting Odds?

Betting odds represent the probability of an outcome and how much money you can win. They come in different formats based on the region or platform you’re using:

• Decimal Odds (e.g. 2.50): Common in Europe and Canada.
• Fractional Odds (e.g. 5/2): Popular in the UK.
• Moneyline Odds (e.g. +200 or -150): Used mainly in the United States.

Each format communicates the same idea but in a different way. Our betting odds calculator automatically converts between them and shows the implied probability behind each set of odds.

How to Use the Betting Odds Calculator

Using our Sports Betting Odds Calculator is very easy:

1. Choose the odds format: Select whether you're entering decimal, fractional, or moneyline odds.
2. Enter the values: Input the specific odds and your bet amount.
3. Get results instantly: The calculator will show your potential profit, total return, implied probability, and more.

Betting Odds Calculation Formulas

Here’s how the calculator works under the hood using simple formulas:

1. Decimal Odds to Implied Probability

Formula:

Implied Probability (%) = (1 / Decimal Odds) × 100

Example: 2.50 → (1 / 2.50) × 100 = 40%

2. Fractional Odds to Implied Probability

Formula:

Implied Probability (%) = Denominator / (Numerator + Denominator) × 100

Example: 5/2 → 2 / (5 + 2) × 100 = 28.57%

3. Moneyline Odds to Implied Probability

Formula (Positive Odds):

= 100 / (Odds + 100) × 100

Formula (Negative Odds):

= Abs(Odds) / (Abs(Odds) + 100) × 100

Example: +200 → 100 / (200 + 100) × 100 = 33.33%

Example: -150 → 150 / (150 + 100) × 100 = 60%

4. Expected Value (EV)

Formula:

EV = (Win Probability × Profit) - (Lose Probability × Stake)

Example: If you bet $100 at 2.50 decimal odds with a 40% win chance:

EV = (0.4 × $150) - (0.6 × $100) = $60 - $60 = $0

5. Kelly Criterion Formula

Formula:

Kelly % = ((b × p) - q) / b

Where:

• b = decimal odds - 1
• p = probability of winning
• q = 1 - p
  This helps calculate the optimal stake based on bankroll and odds.

Example: If I Bet $1,000, How Much Do I Win?

Let’s break down a few examples:

• +200 Odds:
  - Your potential profit = ($1,000 × 200 / 100) = $2,000
  - Total return = $1,000 (stake) + $2,000 = $3,000
• Decimal 3.00 Odds:
  - Your potential profit = ($1,000 × (3.00 - 1)) = $2,000
• Fractional 2/1 Odds:
  - You win $2 for every $1 bet → $2,000 profit on $1,000

What Do Odds Like +500 or +7 Mean?

• +500 odds mean you can win $5 for every $1 bet, or $500 on a $100 bet.
• +7 in point spread means the underdog team is getting a 7-point head start. It’s not odds but a handicap in sports betting.
• +/- odds simply show the favorite (negative) or underdog (positive).

Final Verdict

Betting should be strategic, not guesswork. Our betting odds calculator is designed to help you make informed decisions based on the math behind your bets. Whether you want to know your potential winnings, implied probability, expected value, or how much to bet using the Kelly Criterion we've got you covered.

This tool is 100% free and beginner-friendly, making it perfect for everyday bettors or those just getting started.

FAQs

Can I use this calculator for any sport?

Yes! You can use it for football, basketball, baseball, UFC, soccer, or any sport.

Is this calculator mobile-friendly?

Absolutely! It works on all devices phones, tablets, or desktops.

Does it support multiple odds formats?

Yes, it supports decimal, fractional, and American (moneyline) odds.

What does +200 odds mean?

It means you’ll win $200 on a $100 bet your total payout will be $300.

What’s the best type of odds to use?

That depends on your region. Use the format you’re most comfortable with. Our calculator converts them all.