Math

Random Number Generator

Generate random integers or decimals with count, range, decimal precision, and uniqueness options.

Inputs

Results update as you edit.

Minimum

Maximum

How many numbers

Decimal places

Unique values

Generated numbers

7, 63, 95, 76, 82

Results update as the calculator inputs change.

Count generated

Range

1 to 100

Smallest generated

Largest generated

How Random Number Generation Works

Range

Minimum and maximum values define the possible output range.

Count

The count controls how many random values are generated.

Uniqueness

Unique mode avoids repeated values when the range is large enough.

How to Use Random Numbers Responsibly

Random number generators are useful for sampling, games, classroom examples, and quick decisions. The range, decimal setting, count, and uniqueness rules determine the output.

What Affects Random Output?

Minimum and Maximum

The output cannot fall outside the selected range.

How Many

More numbers increase the chance of repeats unless uniqueness is required.

Decimals

Decimal places control precision for non-integer outputs.

Unique Values

Unique mode requires enough possible values to satisfy the requested count.

Regeneration

Each new generation can produce a different result.

Security

Do not use a casual random generator for cryptographic secrets unless designed for that use.

Random Number Uses

Games and Drawings

Pick numbers for games, raffles, or practice examples.

Sampling

Generate sample values for demonstrations or simulations.

Assignments

Randomize order, groups, or simple classroom tasks.

Frequently Asked Questions

Can random numbers repeat?

Yes, unless unique values are enabled and the range supports the requested count.

What happens if I request too many unique values?

The range must contain enough possible values. Otherwise the request cannot be satisfied.

Are decimals supported?

Yes. Decimal places control how many digits appear after the decimal point.

Is this good for passwords?

Use the password generator for passwords because it is designed around character pools and length.

Is the output truly random?

Browser randomness is suitable for everyday use, but specialized scientific or cryptographic needs may require dedicated tools.