Why ARRAYFORMULA function in Google Sheets? - Purpose & Use Cases

The Big Idea

Discover how one formula can replace hundreds of repetitive calculations instantly!

The Scenario

Imagine you have a list of 100 sales numbers in a spreadsheet, and you want to multiply each by 10% to calculate commission. Doing this by typing a formula in each cell one by one feels like copying the same thing over and over again.

The Problem

Manually entering formulas for each row is slow and boring. It's easy to make mistakes, like missing a row or typing the wrong formula. If you add more rows later, you have to repeat the whole process again.

The Solution

The ARRAYFORMULA function lets you write one formula that works on a whole column or range at once. It automatically applies the calculation to every row, saving time and avoiding errors.

Before vs After

✗ Before

=B2*0.1<br>=B3*0.1<br>=B4*0.1

✓ After

=ARRAYFORMULA(B2:B100*0.1)

What It Enables

With ARRAYFORMULA, you can handle large sets of data with one simple formula that updates automatically as your data grows.

Real Life Example

A store manager uses ARRAYFORMULA to calculate monthly bonuses for all employees at once, so when new employees are added, the bonuses update automatically without extra work.

Key Takeaways

Manually copying formulas is slow and error-prone.

ARRAYFORMULA applies one formula to many rows automatically.

This saves time and keeps your spreadsheet accurate and easy to update.