Random Number Generator 1 to 20

Free Random Number Generator: 1 to 20

This random number generator picks numbers between 1 and 20 (inclusive) with a single click. Pre-set range, no configuration needed — just hit Generate. Useful for raffles, classroom games, picking page numbers, lottery practice, decision-making, and any task that needs an unbiased pick between 1 and 20.

How It Works

The tool uses your browser's Math.random() function — the same pseudo-random generator used by most modern web applications. Each number from 1 to 20 has exactly the same chance of being picked (probability 1/20, or " . round(100 / 20, 2) . "% per outcome).

Use Cases for Random Numbers Between 1 and 20

• Classroom games — pick a student number, page number, or example
• Raffles & draws — when you have 20 tickets and need to pick one
• Decision-making — assign 1-20 to your choices and let chance pick
• Lottery practice — generate quick picks without spinning a wheel
• Statistics / probability — simulate large samples without dice or spinner
• Game master tools — pre-roll d20 results for tabletop RPGs

Need a Different Range?

This page is pre-set to 1-20. For other common ranges:

• 1 to 10 · 1 to 20 · 1 to 30
• 1 to 100 · 1 to 1000
• Or use the main random number generator for any custom range, multiple numbers at once, with or without duplicates, sortable.

Frequently Asked Questions

Is this random number generator truly random?

It's pseudo-random — the same standard used by 99% of computer software. For raffles, games, and everyday picks it's statistically indistinguishable from a truly random source. For high-stakes cryptographic use, look elsewhere.

Are 1 and 20 both included in the range?

Yes — both endpoints are included. A generator "1 to 20" means every integer from 1 through 20 is possible.

Can I generate multiple numbers at once?

Use the main RNG tool to generate batches of numbers, with or without duplicates, sorted or in pick order.

Is anything saved or sent to a server?

No. The generator runs entirely in your browser via JavaScript. Nothing leaves your device.