Random Number Generator from 1 to 38

Random Number Generator
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Random number between 1 and 38?

any of the 38 whole numbers from 1 to 38, each with about a 2.63% chance

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The Range 1–38 in Numbers

N = 38 − 1 + 1 = 38
P = 1 ÷ 38 ≈ 2.63%
Whole numbers in the range 38
Chance of each number 1 / 38 ≈ 2.63%
Even / odd numbers 19 / 19
Chance of an even number 19 / 38 = 50%
Draws for a particular number to reach a 50% chance 26

With repeats allowed, each draw misses a particular number with probability 1 − 1/38, so after k draws it has appeared at least once with probability 1 − (1 − 1/38)k. That first reaches 50% at k = 26.

Related Calculations

See Also

Random Number Generator

This generator picks a random whole number between two bounds, both of them included. The number is drawn in your browser from its cryptographic random source, and every number in the range has the same chance. For example, it can help you find out random number between 1 and 38? Enter the lower bound (e.g. '1') and the upper bound (e.g. '38'), then press 'Generate'. On the result page you can draw several numbers at once, with or without repeats.
Random Number Generator
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Neighbouring Ranges

RangeWhole numbersChance of each number
1–32323.125%
1–3333≈3.03%
1–3434≈2.94%
1–3535≈2.86%
1–3636≈2.78%
0–3637≈2.70%
1–3737≈2.70%
1–3838≈2.63%
1–3939≈2.56%
1–40402.5%
1–4141≈2.44%
1–4242≈2.38%
1–4343≈2.33%
1–4444≈2.27%
1–4545≈2.22%

FAQ

Random number between 1 and 38?

It can be any of the 38 whole numbers from 1 to 38, each with about a 2.63% chance

How many numbers are there from 1 to 38?

38 whole numbers: 38 − 1 + 1 = 38, because both bounds are included. Even numbers among them: 19, odd: 19 — so an even result comes up with a 50% chance.

How many draws does it take to get a particular number from 1 to 38?

With repeats allowed, a particular number has at least a 50% chance of appearing once it has been given 26 draws; after 25 draws the chance is still below 50%. Each draw is independent, so earlier misses do not make it «due».

How to pick several different numbers from 1 to 38?

Set how many numbers you need and tick «No repeats». The generator then draws without replacement, so you can get up to 38 different numbers — the whole range in random order.

See Also