See what happens to probability as the legs stack up.

A simple risk-visualisation workbook for bettors who want to understand the trade-off between bigger combined odds and the shrinking probability that every leg wins.

What it solves

• Focusing on payout without seeing the probability trade-off
• Adding more legs without understanding compounding risk
• Confusion about combined implied probability
• No clear pre-bet reality check for parlays

What you get

• Up to 12 parlay legs
• Per-leg implied probability
• Cumulative combined odds
• Approximate cumulative hit probability
• Approximate chance that at least one leg loses
• Example payout and profit calculator
• AI Prompt Library for risk explanations and discipline checks

Important: Combined probability is an approximation and assumes independence between legs. This tool does not recommend selections or guarantee outcomes.