Random Number Generator 1-20
Get a random number from 1 to 20, or a full random order of 20 numbers.
Result
No history yet. Generate some numbers!
A fair 1 to 20 number picker
A range of 1 to 20 comes up all the time: picking one of 20 students, assigning seats, drawing raffle tickets for a small group, or replacing a twenty-sided die. This generator gives every number from 1 to 20 the same 5% chance on every draw.
To put a group of up to 20 people in a random order, set the count to 20 and enable unique numbers: you get every number from 1 to 20 exactly once, shuffled. Sorting, copying and downloading results work the same way as in the full random number generator.
Playing a tabletop RPG? The dedicated d20 dice roller adds modifiers, several dice at once and roll history.
Frequently asked questions
Can this replace a d20?
Yes. A random number from 1 to 20 has the same probabilities as a fair twenty-sided die. For modifiers and multiple dice use the d20 dice roller.
How do I shuffle the numbers 1 to 20?
Set the count to 20 and enable unique numbers. The result is every number from 1 to 20 in random order.
Is the result random every time?
Yes. Each draw is independent, so the same number can come up twice in a row unless unique numbers is enabled.
More Number Generator presets
Common Use Cases
Lottery & Raffles
Generate random lottery numbers or pick raffle winners
Gaming
Roll dice, draw cards, or generate game seeds
Statistics
Random sampling for research and data analysis
Security
Generate random PINs, codes, or passwords
How It Works
Our random number generator uses a cryptographically secure algorithm to ensure truly random results. Perfect for lottery numbers, statistical sampling, gaming, and any other application requiring random numbers.
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What is a Random Number Generator?
A random number generator (RNG) is a computational tool that produces unpredictable numerical sequences within a specified range. This online random number generator uses cryptographically secure algorithms to ensure true randomness, making it reliable for lottery number selection, statistical sampling, gaming applications, and research purposes. Whether you need a single random number or thousands of unique values, this number picker provides instant results with complete fairness.
The generator works by utilizing advanced mathematical algorithms that create unpredictable sequences. You can customize the minimum and maximum values to define your range, specify how many numbers to generate, and choose whether duplicates are allowed. This flexibility makes it perfect for various scenarios: generating lottery numbers for games like Powerball or Mega Millions, creating random samples for statistical analysis, simulating dice rolls for tabletop gaming, or producing test data for software development.
Many people use this RNG tool for practical decision-making and entertainment. Teachers rely on it to randomly select students for participation, ensuring fairness in classroom activities. Researchers use it for random sampling in scientific studies, maintaining statistical integrity. Game developers implement random number generation for procedural content creation and game mechanics. Social media managers use it to pick contest winners from numbered entries, providing transparent and unbiased selection.
This free online tool offers several advantages over physical methods like dice or drawing numbers from a hat. It generates results instantly, handles large quantities effortlessly, eliminates human bias, and provides options for decimal numbers, sorting, and duplicate prevention. Whether you need random integers for a raffle, decimal values for scientific calculations, or a quick dice roll for board games, this random number generator delivers reliable results every time.