Number List Generator
Build a list of numbers from a start value, an end value and a step, then copy the sequence or export it as CSV.
Number List Generator
Sequence 1 to 100 step 1
Sequence bounds
Step
How to use the number list generator
- Set the start value and the end value. Counting down works, just make the end smaller.
- Set the step, which can be a decimal such as 0.25.
- Press Build the list, then copy the sequence or download it as a CSV.
What is a number list generator
A number list generator builds a list of numbers from a start value, an end value and a step size, then lets you copy the sequence or export it as CSV. Set where the list begins, where it ends and how far apart the numbers sit, and Random Nr fills in the whole run, so you can make a counting sequence, an axis of values or a set of test inputs in seconds.
Common number sequences and their settings
Most lists people need are one of a few standard shapes. This table gives the settings for each so you can build them in one go.
| Sequence | Start | End | Step | Length |
|---|---|---|---|---|
| Count to one hundred | 1 | 100 | 1 | 100 |
| Multiples of five | 0 | 100 | 5 | 21 |
| Countdown | 10 | 1 | 1 | 10 |
| Quarter steps | 1 | 2 | 0.25 | 5 |
| Twenty five step scale | 0 | 1000 | 25 | 41 |
How many numbers a sequence will have
The length of an arithmetic sequence is fixed by its settings: take the distance between the start and the end, divide by the step, round down, then add one for the starting value itself. A list from 0 to 100 in steps of 5 covers a distance of 100, which holds 20 steps, so the sequence has 21 numbers. The nth value is always the start plus n minus 1 steps, which is how you can predict any position without building the list.
Is the number list random or fixed
Unlike the random tools on this site, the number list generator is deterministic: the same settings always build exactly the same list, which is what row numbers, scales, axes and reference columns need. When the order should be scrambled afterwards, paste the result into the number randomizer, and when the values themselves should be random, the random number list generator draws up to 100,000 of them.
More number generators
Frequently asked questions
How do I build a number sequence
Set a start value, an end value and a step. The tool lists every number from the start to the end, moving by the step each time.
Can the step be a decimal
Yes. A step of 0.5 lists values such as 1, 1.5, 2 and so on. Whole number steps give a plain counting list.
Can it count down
Yes. If the end value is smaller than the start, the list counts down by the step.
How long can the list be
Up to 5000 numbers are shown. If a start, end and step would make more, the first 5000 are listed and the rest are left off.
Is it free
Yes, free and with no sign up. Everything runs in your browser and nothing you enter leaves your device.
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For a random draw rather than a fixed sequence, use the random number list generator, or list only even or odd numbers.