Free to use, no account
Number Line Generator
Plot interval notation and points on a clear, downloadable number line.
How do I graph an interval on a number line?
Enter one interval per line, such as (1, 3]. Use square brackets for included endpoints and parentheses for excluded endpoints. Fractions and one-sided infinity are supported.
Frequently asked questions
How do I graph an interval on a number line?
Enter one interval per line, such as (1, 3]. Use square brackets for included endpoints and parentheses for excluded endpoints. Fractions and one-sided infinity are supported.
Are my intervals uploaded?
No. The graph is generated in this browser; your input is not sent or stored.
What do open and closed circles mean?
A hollow circle excludes that endpoint; a filled circle includes it.
Can I plot fractions or infinity?
Yes. Fractions are converted to decimal positions for the drawing. Infinity is allowed only as an open outside endpoint.