How to Use Interval Notation Calculator
The Interval Notation Calculator converts inequalities and interval expressions. Enter x > 3, -2 <= x < 5, x < 1 or x >= 4, or an intersection such as [1,5) ∩ (3,8]. The Interval Notation Calculator returns the standard interval form.
The result area also reminds you how endpoint brackets and infinity endpoints work.
Formula & Theory — Interval Notation Calculator
The Interval Notation Calculator follows standard interval notation. Parentheses mean an endpoint is not included. Brackets mean an endpoint is included. Infinity and negative infinity cannot be included, so they always use parentheses.
For intersections, the Interval Notation Calculator keeps only values shared by both intervals. For unions, it displays allowed intervals together.
Use Cases for Interval Notation Calculator
Use the Interval Notation Calculator for algebra inequalities, number line work, set operations, domain and range questions, calculus intervals, and homework checking. The Interval Notation Calculator is useful when switching between words, inequalities, and interval notation.