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Generate Real Numbers

Generate a list of random real numbers - pick the range, how many decimals, and how many values. Continuous, decimal, high precision. Copy or download the list. Runs in your browser. Free.

Parameters
lower bound
upper bound
0 - 12 places
1 - 1000
Result

        

About Generate Real Numbers

Real numbers are every value on the number line - all the integers, all the fractions, and all the endless decimals in between. They are the numbers of measurement: the 7.25 hours you slept, the 3.14159... you memorised, the 98.6 degrees everyone quotes. If a value can appear on a measuring instrument, it is a real number.

Generate Real Numbers draws sample values from any range you choose, up to 1000 at once, with as many decimal places as you like. Continuous, precise, and ready to copy or save - ideal for simulations, worksheet data and measurement practice.

Features

  • Full number-line range: Set low and high bounds freely, negatives welcome.
  • Decimal precision: Choose how many decimal places each value shows.
  • Continuous sampling: Values drawn anywhere in the interval - not just integers.
  • Bulk output: Up to 1000 real numbers in one run.
  • Measurement-ready: Great stand-in data for physics, stats or worksheets.
  • Copy or download: Export the list one per line.

How to Use

  1. Set the range - low to high, negatives allowed.
  2. Set decimal places - whole numbers up to high precision.
  3. Set the count - up to 1000 values.
  4. Generate - and read your random reals.
  5. Copy or download - the number list.

Examples

1. Range 0-1, 2 decimals, 10 draws: 0.42, 0.87, 0.13 ... - the generator's classic interval.

2. Range 0-100, 1 decimal, 20 draws: measurements like 73.4, 21.9 ... - clean test data.

3. Range -10 to 10, 3 decimals, 30 draws: mixed-sign continuous values.

4. Range 1-10, 0 decimals: effectively random integers (but drawn continuously).

5. Range 98-99, 1 decimal, 5 draws: silly precision for a thermometer joke - 98.6 often appears.

Benefits

  • Measurement-friendly: Continuous values match how tools actually measure the world.
  • Precision toggle: Few decimals for clean lists, many for data science.
  • Full range control: Negative to positive, tiny to large - any interval.
  • Bulk generation: Hundreds of real numbers at once.
  • Copy or download: The full list exports one per line.
  • Private and free: Generation happens in-browser; nothing is uploaded or logged.

Frequently Asked Questions

What is a real number?
Any number you can find on the number line - integers, fractions, decimals, and irrationals like the square root of 2 or pi. Real numbers include everything except imaginary ones.
How is a real different from an integer?
Integers are the whole counting values; reals fill all the gaps between them with endless decimals. Between 1 and 2 lie infinitely many real numbers - 1.5, 1.25, 1.333... - but no integers.
Why "real" at all?
The name is a historical accident. Mathematicians once called the numbers with square roots of negatives "imaginary" and the rest "real" - the word stuck even though everything here is as real as it gets.
Can I set the range?
Yes. Choose a low and high bound; generated values fall anywhere in that interval, including negatives if you want them.
How many decimal places?
Your choice, from whole numbers up to many decimals. More decimals means higher precision - very useful for continuous data or measurements.
How many numbers?
Up to 1000 real numbers in a single run.
What are they used for?
Simulations, continuous distributions, measurement data, tests, and any time you need values with fractional parts rather than clean integers.
Can I copy or download?
Yes. Copy takes the whole list; download saves it as a text file, one number per line.
Is anything stored or uploaded?
No. Everything runs in your browser. Nothing is sent, saved or logged.