Random Number Generator
Pick a number in any range, with or without repeats, big enough for the projector.
- 100% free
- No signup
- Private: stays in your browser
- Updated November 2026
Embed this random number generator on your class websiteFree for Google Sites, blogs and LMS pages. No ads inside the embed.
How to use the random number generator
- 1
Set the range, for example 1 to 30 for a class of 30, or tap a quick range.
- 2
Choose how many numbers you need, and whether numbers can repeat.
- 3
Press Generate or the space bar. Press F to show the result on the projector.
A random number generator made for the classroom
This random number generator picks whole numbers in any range you choose, and shows them big enough to read from the back of the room. It's the quickest way to choose a student by their class number, pick a page to read, set a math challenge or settle who goes first.
Turn on No repeats to draw numbers like tickets from a hat: each number can only come up once per draw, which is ideal for raffles, turn order or choosing several students at once. Need numbers for an activity? Ask for 5 or 10 at a time and sort them from smallest to largest for a ready-made list.
Every number is equally likely. Results are chosen in your browser, and the last dozen draws stay on screen so you can look back at what came up.
For math lessons, the generator doubles as a probability tool. Draw the same range many times and ask the class to predict how often each number will appear, then compare the prediction with the results.
Classroom ideas for random numbers
Number your students
Give each student a number, then generate one to call on someone fairly, or several for presentation order.
Mental math warm-up
Generate two numbers from 1 to 100 and ask the class to add, subtract or compare them.
Place value practice
Use 0 to 9 and draw three digits. Students build the largest and smallest number they can.
Random page reading
Set the range to your book's pages and read a passage from wherever it lands.
Probability experiment
Generate 1 to 6 many times and tally the results to compare with a dice roll.
Raffle draw
Number the raffle tickets and draw winners with No repeats turned on.
Frequently asked questions
Is this random number generator truly random?
It uses a high-quality pseudo-random algorithm seeded from your browser, so every number in the range is equally likely. That's more than random enough for classroom use, games and raffles.
How do I get numbers without repeats?
Turn on No repeats. In one draw, each number appears at most once, so you can't ask for more numbers than the range contains.
Can I generate a number from 1 to 100?
Yes. Tap the 1–100 quick range, or type any range, including negative numbers.
Can I pick several numbers at once?
Yes, up to 10 per draw. Turn on sorting to list them from smallest to largest.
Can I show it on the projector?
Yes. Press F or Present for a fullscreen view with very large digits.