Raffle Win Probability Calculator
Enter your tickets, total tickets, and prize count to instantly see your exact odds of winning.
Use the Raffle Win Probability Calculator
Raffle Details
How many tickets you purchased
All tickets in the raffle pool
Total prizes being awarded
Your Odds
Single-Draw Win Probability
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Chance of winning on any one prize draw
At Least One Win (all prizes)
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Probability of winning at least one prize across all draws
How Ticket Count Affects Your Odds
At-least-one-win probability for different ticket counts (total tickets and prizes held constant).
| Your Tickets | At-Least-One-Win | 1 in N |
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Summary
The Raffle Win Probability Calculator gives you the exact mathematical odds of winning based on how many tickets you hold, how many are in the draw, and how many prizes are on offer. It computes both the per-draw chance and the cumulative probability of winning at least one prize when multiple prizes are awarded. All calculations run locally in your browser with no data sent anywhere.
How it works
- Enter your ticket count, total tickets, and number of prizes.
- The single-draw probability is your tickets divided by total tickets.
- The at-least-one-win probability uses the hypergeometric complement formula.
- Results are shown as a percentage, a ratio, and a 1-in-N fraction.
Use cases
- Decide how many raffle tickets to buy to hit a target win probability.
- Compare your odds across different raffles before purchasing.
- Understand the impact of prize count on your overall winning chances.
- Calculate office pool odds when splitting a block of tickets.
- Evaluate charity raffle value against ticket price.
- Teach probability concepts with a relatable real-world example.