What is Dynamic Array in Excel: Explained with Examples

A dynamic array in Excel is a formula that automatically spills results into multiple cells without needing to copy the formula down. It updates the output range dynamically when the source data changes or the formula is edited.

How It Works

Imagine you want to list several results from one formula, like a list of numbers or names. Instead of typing the formula in each cell, a dynamic array lets you write it once, and Excel fills the cells below or beside it automatically. This is like pouring water into a container that spreads out to fill the space needed.

When you enter a formula that returns multiple values, Excel creates a "spill range" where the results appear. If the data changes, the spill range updates itself without extra work. This makes managing lists and tables easier and faster.

Example

This example shows how a dynamic array formula returns multiple values automatically.

excel

=SEQUENCE(5,1,10,2)

Output

10
12
14
16
18

When to Use

Use dynamic arrays when you want to generate lists, filter data, or perform calculations that return multiple results without copying formulas. For example, you can create a list of unique names from a column, filter sales above a target, or generate a series of numbers.

This saves time and reduces errors because you only write the formula once, and Excel handles the rest.

Key Points

• Dynamic arrays automatically fill multiple cells from one formula.
• They update automatically when source data changes.
• Functions like SEQUENCE, FILTER, and UNIQUE use dynamic arrays.
• They simplify working with lists and tables in Excel.

Key Takeaways

Dynamic arrays let one formula fill many cells automatically.

They update results dynamically when data changes.

Use dynamic arrays to simplify list and table calculations.

Functions like SEQUENCE and FILTER rely on dynamic arrays.