Raffle Draw Odds Calculator

The Raffle Draw Odds Calculator computes raffle draw odds from the relation win chance percent = (1 - C(total - your tickets, draws) / C(total, draws)) x 100. It takes 3 inputs (total tickets sold in tickets, your tickets held in tickets, number of prize draws in draws) and returns the raffle draw odds. These calculators cover the small arithmetic of ordinary life rather than specialist work: what a discounted price comes to, what an item costs each time you use it, how a space compares by the square metre, what the odds are in a coin toss or a prize draw, and what a for-fun score works out at. Each one asks for a handful of everyday figures and assumes no background beyond them. Enter your values below and the result updates instantly, and you can share a permalink that pre-fills the exact calculation. These tools work only from the figures you type in, so the care goes into the inputs: put any options you are comparing on the same basis (same unit, same quantity or area, and the same treatment of extras such as tax or delivery), enter counts and totals exactly as each field defines them, and treat anything you are estimating yourself, such as how often you expect to use an item, as the figure most likely to move the answer. For example, with total tickets sold = 200 tickets, your tickets held = 1 tickets, number of prize draws = 1 draws, the raffle draw odds works out to 0.5, and the worked example further down the page shows every step so you can follow the arithmetic and reproduce it by hand. The method is the standard form documented by CalculatorHub methodology, and the figure above each result carries the date it was last verified. Each result is arithmetic on the figures you entered and nothing more: the compatibility and lucky number tools are for entertainment and carry no predictive meaning, the chance figures describe the odds rather than what will actually happen on the day, and the money comparisons cannot weigh quality, durability, condition or how much you want the thing, so the option that wins on paper is not always the one to choose.

With Total tickets sold = 200 tickets, Your tickets held = 1 tickets, Number of prize draws = 1 draws, the result is 0.5.

Formula: win chance percent = (1 - C(total - your tickets, draws) / C(total, draws)) x 100. Source: CalculatorHub methodology, as at 2026-06-23.

Raffle Draw Odds0.5

Applies to: any numeric inputs. Method source: CalculatorHub methodology, checked 2026-06-23.

The formula

win chance percent = (1 - C(total - your tickets, draws) / C(total, draws)) x 100

Worked example

With Total tickets sold = 200 tickets, Your tickets held = 1 tickets, Number of prize draws = 1 draws:

  1. Ways to miss = C(199,1)
  2. Total ways = C(200,1)
  3. Win chance = (1 - miss/total) x 100 = 0.5000000000000004 percent
  4. Raffle Draw Odds = 0.5

This worked example is one of the automated golden-value tests this calculator must pass before it can publish.

What this assumes

  • Inputs are real numbers in the units shown.
  • The result is the exact value of win chance percent = (1 - C(total - your tickets, draws) / C(total, draws)) x 100; general information, not professional advice.

Frequently asked questions

What formula does this use?

win chance percent = (1 - C(total - your tickets, draws) / C(total, draws)) x 100, the standard form documented by CalculatorHub methodology.

Does the result ever change over time?

No. This is a pure formula with no external rate, so the same inputs always give the same result.

Official sources and verification

Reviewed by the CalculatorHub team, edited by James Graham, 2026-06-23. See our methodology. General information, not professional advice.