Automating Repetitive Spreadsheet Tasks

The most powerful use of AI with Google Sheets is eliminating repetitive manual work. If you find yourself doing the same thing over and over—categorizing, labeling, transforming—AI can write a formula to do it instantly.

Categorizing Data

One of the most common repetitive tasks is categorizing rows based on rules.

Manual approach: Read each row, decide the category, type it in. Repeat 500 times.

AI approach: Describe your rules and get a formula.

AI will write a formula using REGEXMATCH with IFS that checks each condition:

=IFS(REGEXMATCH(LOWER(A2), "coffee|restaurant|food"), "Food & Drink", REGEXMATCH(LOWER(A2), "amazon|store|shop"), "Shopping", REGEXMATCH(LOWER(A2), "uber|lyft|gas"), "Transportation", TRUE, "Other")

Generating Consistent Text

Need to create standardized messages, labels, or descriptions from data?

"Column A has first name, column B has last name, column C has company. I want column D to say 'Dear [First] [Last] from [Company], thank you for your order.' for each row."

AI gives you a formula that concatenates:

="Dear "&A2&" "&B2&" from "&C2&", thank you for your order."

Wrap it in ARRAYFORMULA to apply to every row at once.

Conditional Formatting via Formulas

Instead of manually color-coding, describe what you want highlighted:

"I want to highlight rows where column C (Status) is 'Overdue' in red. Give me the custom formula for conditional formatting."

AI tells you to use conditional formatting with the formula: =$C2="Overdue"

Extracting Information

Pull specific pieces from messy text:

"Column A has strings like 'Order #12345 - Shipped'. I want to extract just the order number into column B."

AI writes: =REGEXEXTRACT(A2, "#(\d+)")

Multi-Step Automations

For complex workflows, describe the entire process:

*"I have raw survey responses in Sheet1. I need Sheet2 to automatically show:

1. The average rating from column D
2. A count of responses by department (column B)
3. A list of all responses with rating below 3"*

AI will give you separate formulas for each: AVERAGE for ratings, COUNTIF for department counts, and FILTER for low ratings.

Scaling with ARRAYFORMULA

Always ask for the ARRAYFORMULA version when you need a formula to apply automatically to new rows:

"Wrap this in ARRAYFORMULA so it applies to every row automatically, including new rows I add later."

This means you write the formula once in row 2 and it fills down the entire column—even for rows you add in the future.

Key Takeaway

Any time you catch yourself doing the same task more than twice, stop and ask AI for a formula. Describe your rules or pattern in plain English, and AI will convert it into a formula that handles hundreds or thousands of rows instantly. Always ask for the ARRAYFORMULA version to future-proof your automation.