Is this random enough for security or gambling?

No. This generator uses Math.random(), which is not cryptographically secure. For security‑critical or regulated use cases, rely on a cryptographic random source instead.

Can I get integers instead of decimals?

Yes. After generating the decimal result, round it to the nearest whole number, or use floor/ceil logic if you prefer always rounding down or up.

everyday calculator

Random Number Generator

Generate a random number within a custom range for games, giveaways, or simulations.

Results

Random result: 57.17

How to use this calculator

Enter the minimum value for your range.
Enter the maximum value for your range (greater than or equal to the minimum).
Click to generate a random number between these two values.
If you need integers (for example, ticket numbers), round the result to the nearest whole number or floor/ceil it as needed.
Repeat as often as you like to generate additional random values.

Inputs explained

Minimum: The lowest value you want to allow in the range. This can be a whole number or a decimal. If you enter a value higher than the maximum, swap the two so min ≤ max.
Maximum: The highest value you want to allow in the range. This can also be a whole number or a decimal. Together with the minimum, it defines the interval for random picks.

How it works

We use JavaScript’s Math.random() function to generate a pseudo‑random decimal between 0 (inclusive) and 1 (exclusive).

We scale that value to your requested range using the formula result = min + Math.random() × (max − min).

The output is a decimal value between min and max. You can round it if you need whole numbers or specific precision.

Because this uses Math.random(), the randomness is suitable for casual use, not for cryptographic or high‑stakes applications.

Formula

Random result = min + Math.random() × (max − min)

When to use it

Picking a winner for a giveaway, raffle, or drawing when you have numbered tickets or entries.
Assigning random teams, seats, or orderings in classrooms, workshops, or informal events.
Generating simple random test inputs when prototyping scripts, formulas, or simulations.
Choosing random IDs, offsets, or sample indexes in non‑critical technical workflows.

Tips & cautions

If you need whole numbers (for example, 1–10), round the output or use floor/ceil logic: e.g., Math.floor(result) or Math.round(result).
Double‑check that your minimum is less than or equal to your maximum; invert them if you entered them backwards.
For repeatable sequences in code (such as testing), use a seeded random generator rather than Math.random().
Avoid using this for security‑sensitive tasks such as password generation, lotteries, or gambling—use cryptographic randomness instead.
Uses Math.random(), which is not cryptographically secure and is not appropriate for security, gambling, or regulatory applications.
Produces a single random value per run; it does not track or guarantee uniqueness across multiple calls.
Floating‑point representation means that not every decimal value in very large or precise ranges will be hit exactly.

Worked examples

1–10 dice roll

Set min = 1 and max = 10.
Generate a random decimal and round to the nearest whole number.
Interpretation: use the rounded value as a virtual die roll.

100–999 raffle ticket

Set min = 100 and max = 999.
Generate a random result and round to a whole number.
Interpretation: the rounded value can represent a winning ticket number in that range.

Deep dive

Generate a random number in any range for giveaways, games, team assignments, or quick simulations using a simple Math.random()-based generator.

Enter minimum and maximum values, then copy or round the result if you need whole numbers for tickets or indexes.

Perfect for casual use, classrooms, and basic testing where you don’t need cryptographic randomness.

FAQs

Is this random enough for security or gambling?: No. This generator uses Math.random(), which is not cryptographically secure. For security‑critical or regulated use cases, rely on a cryptographic random source instead.
Can I get integers instead of decimals?: Yes. After generating the decimal result, round it to the nearest whole number, or use floor/ceil logic if you prefer always rounding down or up.

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This random number generator is for casual and educational use only. It uses a standard pseudo‑random function and is not suitable for gambling, cryptographic purposes, or situations where strict randomness or fairness guarantees are required.