Free Sports Betting Tools & Calculators
Professional-grade tools for sports bettors and prediction market traders. Calculate expected value, convert odds, track line movement, and manage positions -- all free, no account required.
Free tools
Each tool is purpose-built for sports betting and prediction market analysis. Use them individually or together for a complete workflow.
EV Calculator
FreeCalculate the expected value of any bet or prediction market trade. Input your estimated probability and the market price to get instant EV analysis, edge percentage, and Kelly criterion position sizing.
Odds Converter
FreeConvert between American (+150, -200), Decimal (2.50), Fractional (3/2), and Implied Probability formats instantly. Essential for comparing odds across sportsbooks and prediction markets that use different formats.
Currency Calculator
FreeConvert between USD, USDC, ETH, and other currencies used across prediction market platforms. Useful for comparing positions across Kalshi (USD) and Polymarket (USDC) or crypto-based platforms.
Line Intelligence
FreeTrack how odds move across sportsbooks and prediction markets in real-time. Identify steam moves, reverse line movement, and price convergence patterns that signal sharp money activity.
Bet Tracker
FreeLog your bets, track win/loss records, and calculate ROI and profit over time. All data stored locally in your browser with CSV export. No account required.
Why we build free tools
We believe better-informed bettors create healthier, more efficient markets. Free tools are our way of contributing to that ecosystem.
Education first
Tools like the EV Calculator teach fundamental concepts -- expected value, implied probability, Kelly criterion -- through hands-on use. Understanding these concepts is the foundation of profitable trading.
Better decisions
Every bet should be evaluated quantitatively, not emotionally. Free calculators remove the barrier to making math-based decisions, even for casual bettors just getting started.
Cross-platform insight
The Odds Converter and Currency Calculator help traders compare opportunities across sportsbooks and prediction markets that use different formats and currencies, revealing edges that are otherwise hidden.
Trust through value
We earn trust by providing genuine value upfront. When you are ready for more advanced capabilities, our paid tools -- the +EV Scanner, Data Notebooks, and API -- are natural next steps.
Advanced tools for serious traders
When you are ready to go beyond manual calculation, these products automate edge detection and analysis at scale.
+EV Scanner
Real-time scanning across 500+ sources. Automated alerts when cross-platform price gaps exceed your EV threshold.
- Sub-50ms data latency
- Email, SMS, Slack alerts
- Configurable thresholds
Data Notebooks
Interactive Python environment with live odds feeds from every major platform. Build models and backtest strategies.
- Python & SQL support
- Historical tick data
- Scheduled automation
Market Data API
REST + WebSocket APIs for real-time and historical odds. Build bots, dashboards, and custom tools.
- REST + WebSocket
- Python & Node.js SDKs
- 500+ normalized sources
Frequently asked questions
Common questions about our betting tools.
Are these sports betting tools really free?
How is the EV Calculator different from other calculators?
Can I use these tools for sports betting and prediction markets?
What is Line Intelligence and why does it matter?
Do I need to create an account to use the free tools?
What advanced tools does EVSignals offer beyond the free ones?
Ready to calculate your edge?
Start with our free EV Calculator -- the most popular tool for prediction market and sports betting analysis.