Stop Repeating Formulas in Excel — Create Your Own Function Instead!
- Kyle Pew
- 4 days ago
- 2 min read
If your Excel workbook is full of the same formula repeated over and over, you’re not alone.
In fact, one of the most common inefficiencies I see in real-world Excel files is formula duplication:
Hundreds of rows each containing the same logic
Long formulas copied across multiple sheets
Slight variations that break over time
Manual fixes every time something changes
Good news:
There’s a faster, cleaner, and smarter way to work.
Excel now allows you to turn any formula into a reusable custom function — without writing a single line of VBA.
It’s called a Named LAMBDA Formula, and it might be one of the most underrated features in Excel today.
What Is a Named LAMBDA Formula?
Think of a Named LAMBDA as a custom Excel function you build yourself.
Just like Excel has:
SUM()
VLOOKUP()
TEXTJOIN()
…you can now create:
SalesTax()
DiscountPrice()
FullName()
ProfitMargin()
IsWeekend()
And use them anywhere in your workbook.
Instead of repeating the same formula 200 times, you:
Write the logic once
Name it
Call it like any built-in Excel function
Why This Is a Game-Changer
1. Cleaner Workbooks
Instead of cryptic formulas like:
=F2 * 0.075You use:
=SalesTax(D2)Much easier to read — and impossible to misinterpret.
2. Easier Maintenance
If you ever need to change the logic (maybe tax goes from 7.5% to 8.0%),you update it once in Name Manager.
Every formula in the workbook updates automatically.
3. Fewer Errors
Repeated formulas become inconsistent over time.Named functions ensure the logic is always the same everywhere.
4. Better Performance
Excel stores the logic once, not 500 times — making your sheet lighter and more efficient.
EXERCISE FILE: