Raffle Odds Calculator
Calculate your chances of winning a raffle
Formula:
Probability = Your Tickets / Total TicketsRaffle Details
Enter your raffle information
How many tickets you have
Total tickets in the raffle
How many prizes will be drawn
Your Winning Odds
Probability of winning at least one prize
Win Probability
1.00%
1 in 100
You own 1.00% of all tickets
Your Tickets
5
Total Tickets
500
Winners Drawn
1
Ownership
1.00%
Tickets Needed for Target Odds
5% Chance
25 tickets
10% Chance
50 tickets
25% Chance
125 tickets
50% Chance
250 tickets
Note: Raffle odds are typically much better than lottery odds. A 1 in 500 raffle chance is approximately 600,000× better than Powerball jackpot odds.
Common Raffle Scenarios
Load typical raffle configurations
Raffle Probability Formula
How raffle odds are calculated
P(win) = Your Tickets / Total Tickets
For multiple winners (at least one win):
P = 1 - ((T-Y)/T)^W
where T = total tickets, Y = your tickets, W = number of winners
Quick Answer
TL;DR summary
Raffle odds = Your Tickets / Total Tickets for a single winner. With 5 tickets out of 500 total, you have a 1% (1 in 100) chance of winning. For multiple winners, the calculation becomes more complex but generally your odds improve. Unlike lotteries, raffle odds are fixed and known - you can calculate exactly how many tickets to buy for your desired probability.
Key Facts About Raffles
Important things to know
- Basic raffle odds: Your Tickets ÷ Total Tickets = Win Probability
- Unlike lottery, raffle odds are knowable and fixed once ticket sales end
- Multiple winners increase your chance of winning at least one prize
- Buying more tickets improves odds linearly (10× tickets = 10× odds)
- 50/50 raffles split the pot between winner and organization
- Charity raffle ticket purchases may be partially tax-deductible
- Always check raffle rules for prize claim deadlines and requirements
Frequently Asked Questions
Common raffle questions
How do I calculate my raffle odds?
For a single winner: divide your tickets by total tickets. With 10 tickets out of 1,000 total, you have 10/1,000 = 1% or 1 in 100 chance. For multiple winners, the math is more complex but your odds of winning at least one prize generally improve.
How many tickets should I buy?
It depends on your budget and desired odds. For a 5% chance with 1,000 tickets sold, you need 50 tickets. Calculate: Desired Probability × Total Tickets = Tickets Needed. Consider the prize value vs ticket cost for expected value.
Are raffle odds better than lottery odds?
Usually yes, dramatically so. A typical raffle might offer 1 in 1,000 odds vs. lottery odds of 1 in 300 million. Raffle prizes are typically smaller, but the odds are millions of times better.
Does buying all tickets guarantee I win?
Yes, if you buy all tickets for a single-winner raffle, you're guaranteed to win. However, the cost typically exceeds the prize value since organizers build in a profit margin for their cause.
What is a 50/50 raffle?
A 50/50 raffle splits the total pot - half goes to the winner and half to the organization. The prize grows as more tickets are sold, making it an exciting format where you can see the potential prize increase in real-time.
How this works
Calculations follow the published mathematics of the game — combinatorics for cards, probability theory for dice, and expected-value accounting for wagers. Results are verified against independent references (primarily Wizard of Odds). No calculation here is an opinion or recommendation; it is arithmetic applied to the rules of the game.
What this tool can’t do
When to consult a professional
This tool computes probability and expected value. It is not a betting system and cannot predict the outcome of any individual wager. If gambling is causing problems for you or someone you know, call the National Problem Gambling Helpline at 1-800-GAMBLER.
Sources
- [1]Wizard of Odds — Michael Shackleford, ASAIndustrywizardofodds.comAccessed Apr 21, 2026
Actuary; widely cited casino-game probability reference. Used for house-edge and EV verification.
- [2]National Council on Problem GamblingOfficial sourcencpgambling.orgAccessed Apr 21, 2026
Responsible-gambling guidance and 1-800-GAMBLER helpline.
Joseph OrdunaFounder & Software Engineer
Full-stack software engineer specializing in embedded systems, web architecture, and AI/ML. Founder of Practical Web Tools. Built the gesture-controlled drone IP acquired by KD Interactive (Aura Drone, sold on Amazon).