Step-by-step instructions
Enter labels and positive weights
Use option | weight on each line. A weight describes the option’s share relative to the total.
Check the weight totals
Use consistent units such as entry counts or percentage values. Combine records that should represent one option.
Draw a single option
Select Pick an option. Save the result before another draw; remove an option manually when later draws must exclude it.
Worked example
An activity uses four outcomes with weights 4, 3, 2, and 1. Their total is 10.
One valid result is shown below. Your generated outcome will vary.
Example input
Outcome A | 4 Outcome B | 3 Outcome C | 2 Outcome D | 1
Example result
1. Outcome A
The intended shares are 40%, 30%, 20%, and 10%. The generated label is one outcome from that pool.
Separate the probability plan from a fixed result schedule
Probability shares describe how independent choices are made, not what a short batch must contain. If a game needs fixed counts in a deck, prepare those counts and shuffle them instead. Remove an impossible outcome rather than giving it a zero weight, because this tool requires positive weights for every entered option.
Settings and limits to check
The example has 4 retained entries. At least two entries are needed. Weights must be positive finite numbers no greater than 1,000,000,000 each. An option’s theoretical share is its weight divided by the sum of all weights; values need not sum to 100. Each generation selects one option and keeps the original choices for the next draw. Zero-weight choices should be left out.
Settings used in this example
Remove duplicate entries: Off
Keep a usable copy of the result
Use Copy to place the current result in your own notes, or Download to keep a text file. Keep the eligible input list with the result when you need to explain which entries took part. A new generation replaces the displayed result rather than adding to a saved history.
The tool runs in your browser and does not upload your input. Save the result before refreshing or leaving the page. If other people need to use the same outcome, share your saved copy rather than asking them to generate another independent result.
Frequently asked questions
Can I give an option a zero weight?
No. Omit that option from the current list. Entered weights must be positive.
Must my weights add to 100?
No. Only relative weights matter. Values 3, 2, 1 produce the same relative shares as 30, 20, 10.
Can a chosen option win again?
Yes. Each click starts another draw from the current list. Remove previous winners yourself when repeat winners are disallowed.
What should I check in the worked example?
The intended shares are 40%, 30%, 20%, and 10%. The generated label is one outcome from that pool.