About SportPredict: How We Analyze Sports Data
SportPredict is a free sports data analysis platform that combines real-time bookmaker odds with prediction market data to deliver comprehensive match insights. Unlike traditional odds comparison sites that simply list numbers, SportPredict integrates crowd-sourced probability estimates from Polymarket alongside odds from more than 20 licensed bookmakers worldwide, giving users a dual perspective on every match. This unique combination allows you to see not just what bookmakers think, but also what the crowd believes, highlighting discrepancies that can indicate value opportunities or market inefficiencies.
Our probability analysis engine calculates implied probabilities from bookmaker odds, adjusts for the overround (the bookmaker margin built into the odds), and presents the true market-estimated likelihood of each outcome. For each match, we display home win, draw, and away win probabilities as visual bars and percentage values, making it easy to compare at a glance. When multiple bookmakers offer different odds for the same event, our system identifies the best available odds and flags potential arbitrage opportunities where the combined implied probability drops below 100%.
The methodology behind SportPredict is straightforward and transparent. We pull live odds data from The Odds API, which aggregates feeds from major bookmakers including Bet365, Betfair, Pinnacle, DraftKings, and many others. For prediction market data, we connect to Polymarket, the largest decentralized prediction market platform. By comparing traditional bookmaker odds (which reflect professional risk assessment and liability management) against prediction market prices (which reflect decentralized crowd consensus), SportPredict reveals where the two markets disagree. These divergences are often the most interesting data points for analysts seeking edge. All our tools, including the Odds Calculator, Probability Analyzer, and Odds Comparison tool, are free to use and require no sign-up.
Learning Center
Kelly Criterion
Learn the mathematically optimal strategy for bet sizing. The Kelly formula helps you maximize long-term growth while managing risk effectively.
Odds Conversion
Understand how decimal, fractional, and American odds formats relate to each other. Convert between formats and calculate implied probability.
Arbitrage Betting
Discover how odds discrepancies between bookmakers create arbitrage opportunities where you can guarantee a profit regardless of the outcome.
Prediction Markets
Explore how prediction markets like Polymarket work, how they differ from traditional sportsbooks, and what crowd wisdom reveals about event outcomes.
Prediction Markets
Real-time crowd predictions from Polymarket
Guides & Strategy
๐ Kelly Criterion Guide
Master optimal bet sizing with the Kelly formula
๐ Odds Conversion Guide
Decimal, fractional & American odds explained
๐ฐ Arbitrage Betting Guide
Find sure bets using odds discrepancies
๐ Bookmaker Margin Guide
Understand overround, vig, and juice
๐ World Cup 2026 Guide
Odds, predictions, and analysis for FIFA 2026
๐ Prediction Markets Explained
How prediction markets work and compare to sportsbooks
Explore More
Frequently Asked Questions
What is SportPredict?
SportPredict is a free sports data analysis platform that aggregates real-time odds from over 20 bookmakers and combines them with prediction market data from Polymarket. We provide probability analysis, odds comparison, and match insights for football, basketball, baseball, ice hockey, tennis, boxing, MMA, F1, and more.
How are match predictions calculated?
Our predictions are based on implied probabilities derived from bookmaker odds. We collect odds from multiple bookmakers for each match, calculate the implied probability for each outcome (home win, draw, away win), adjust for the bookmaker overround, and present the true market-estimated probability. We also overlay Polymarket crowd predictions for comparison.
What is the difference between bookmaker odds and prediction markets?
Bookmaker odds are set by professional oddsmakers who factor in statistical models, market liability, and profit margins (the overround). Prediction markets like Polymarket reflect the collective wisdom of decentralized participants trading on outcomes. When the two disagree, it can signal a value opportunity or market inefficiency worth investigating.
Is SportPredict free to use?
Yes, SportPredict is completely free. All our tools, including the Odds Calculator, Probability Analyzer, and Odds Comparison tool, are available at no cost and require no sign-up or registration. We do not offer betting services or charge any fees.
How often is the data updated?
Our odds data refreshes automatically every few minutes during active match periods. The auto-refresh feature can be toggled on or off from the top bar. Prediction market data from Polymarket updates every 60 seconds. You can also manually refresh at any time using the refresh button.
Can I compare odds across different bookmakers?
Yes. Our Odds Comparison tool shows side-by-side odds from more than 20 bookmakers for each match, highlighting the best available odds for each outcome. This helps you identify where the most favorable prices are offered and spot potential arbitrage opportunities.