Random Decimal Generator

Generate a batch across a numeric range

This random decimal number generator creates a list of values between a minimum and maximum you enter. Set how many results you need, choose the displayed decimal places, and optionally sort the list in ascending order. For example, a range from 0.5 to 2.5 with two places produces values displayed in a form such as 1.37 or 2.04. Each run is a new sample; the example values are illustrative, not a promised output.

How the range becomes a displayed value

For each result, the generator scales a random fraction to your interval, then formats it to the selected number of places:

The underlying random fraction does not reach 1, so the unformatted value is below the entered maximum. Formatting can round a value up to that maximum, however. With a range of 0 to 1 and one displayed place, a value close to 1 may appear as 1.0. The output is therefore rounded decimal text, not a guarantee that every displayed value is equally likely. The ECMAScript specification describes Math.random as approximately uniform over [0, 1), and toFixed as fixed-place formatting; see the ECMAScript 2026 language specification (checked September 28, 2026).

What precision means here

Decimal places control the number of digits shown after the decimal point, including trailing zeros. Thus 1.20 and 1.2 represent the same numeric quantity, while only the first visibly records two places. Changing displayed precision also changes how many distinct strings are possible and can make separate underlying samples look identical.

Set up and keep a batch

1. Choose matching bounds

   Enter the lower and upper values using the same unit or scale. The minimum must be less than the maximum; equal or reversed bounds produce no results. Negative and fractional bounds can be used, such as -2.5 and 3.5.

2. Set quantity and places

   Enter the number of values (the field is intended for 1–10,000) and the number of decimal places, up to 10. The default batch contains 10 values at two places. To show whole-number formatting, use zero places; if the places field is cleared or invalid, the displayed precision falls back to two.

3. Generate, sort, and copy

   Select ascending sort if order is useful, then choose Generate. Editing settings or changing the sort option creates a fresh batch. Copy an individual result or copy the entire comma-separated list, for example 0.31,0.58,0.92. Copy the values before changing settings if you need to keep that particular sample.

Common questions about decimal output

Use the output as a sample, not an audit record

This generator is intended for examples, placeholder data, and informal sampling. Do not use its results for passwords, keys, security tokens, regulated drawings, gambling, or any selection that requires cryptographic strength, provable fairness, or an auditable process.

• Values are generated with ordinary pseudorandom behavior and are not seeded for reproducibility. Save a copied batch and its settings if you need a record of what you used.
• Results are floating-point samples formatted as decimal strings. Very large magnitudes or fine precision may not behave like exact decimal arithmetic.
• The requested number of results is not a uniqueness guarantee. For distinct outcomes, define and check an explicit discrete set in a workflow that supports sampling without replacement.
• Sorting changes presentation and produces a new draw when toggled; it does not make a sample more representative.