Sports Betting Odds Converter

Convert between American, decimal, and fractional odds. See implied probability and payout.
Odds Format
$

Payout

$250.00

Profit

$150.00

Implied Prob.

40.0%

All Formats

American+150
Decimal2.500
Fractional3/2
Implied Probability40.00%

Use the Sports Betting Odds Converter above to calculate your results. Enter your values and see instant results — all calculations run in your browser.

Disclaimer: This calculator is for informational purposes only and does not constitute tax, financial, or legal advice. Results are estimates based on the information you provide and current rates. Always consult a qualified tax professional or financial advisor for advice specific to your situation.

How It Works

This Sports Betting Odds Converter allows you to effortlessly switch between American, Decimal, and Fractional odds formats. Understanding these different odds is crucial for comparing lines across various sportsbooks and making informed betting decisions, especially with the 2026 FIFA World Cup and the 2026 Winter Olympics on the horizon. This tool also calculates the implied probability of an outcome and the potential payout for your wager.

The conversions are based on standard mathematical formulas. For American odds, positive odds (+X) imply a payout of X for a $100 stake, while negative odds (-X) mean you must wager X to win $100. Decimal odds represent the total return for a $1 stake (including the original stake), and fractional odds show the profit relative to your stake (e.g., 5/2 means you win $5 for every $2 staked). Implied probability is calculated as (Stake / Total Payout) for all formats.

A common mistake is confusing payout with profit, especially with decimal odds which include your initial stake. Always double-check the odds format offered by your sportsbook to avoid miscalculations. Remember that implied probability doesn't account for the sportsbook's vig (or juice), so the sum of implied probabilities for all outcomes in an event will typically exceed 100%.

Example: 2026 FIFA World Cup Match - Brazil vs. Germany

  1. 1 You see Brazil listed at -150 American odds to win their opening group stage match against Germany in the 2026 FIFA World Cup. You want to bet $50.
  2. 2 Using the converter, -150 American odds converts to approximately 1.67 Decimal odds and 2/3 Fractional odds. The implied probability for Brazil to win is 60%.
  3. 3 If you place a $50 bet on Brazil at -150 American odds, your potential payout would be $83.33.
  4. 4 This means you would profit $33.33 on your $50 wager if Brazil wins. If you saw another sportsbook offering Brazil at 1.70 Decimal odds, you would know that's a slightly better value than -150 American odds (which is 1.67 Decimal), allowing you to shop for the best line.

Source: ACE · Last updated: April 2026

Frequently Asked Questions

How do you convert American odds to decimal?
For positive American odds: divide by 100 and add 1 (e.g., +150 = 2.50). For negative odds: divide 100 by the absolute value and add 1 (e.g., -200 = 1.50).
What does -110 odds mean?
-110 means you must bet $110 to win $100 in profit. This is the standard line for point spread bets and includes the sportsbook's built-in margin (vig). The implied probability is about 52.4%.
How do you calculate implied probability from odds?
For negative American odds: absolute value / (absolute value + 100). For positive: 100 / (odds + 100). For -150: 150/250 = 60%. For +200: 100/300 = 33.3%.

You might also need

One Rep Max (1RM) Calculator

Estimate your one rep max from any weight and rep count. See training percentages for all rep ranges.

Running Pace Calculator

Calculate running pace from distance and time, or finish time from distance and pace. Preset distances for 5K to marathon.

Heart Rate Zone Calculator

Calculate training heart rate zones using max HR or Karvonen method. See optimal zones for fat burn and performance.