I’m wondering if there’s a way to make my own custom functions in Google Sheets that work just like the built-in ones. What I want to do is create a function that I can call from any cell by typing something like =customCalc(A1, A2, A3) and have it reference other cells. For example, let’s say I want to make a function that calculates a weighted average: =weightedAvg(B5, B6, 0.3, 0.7) Is this something Google Sheets supports? I’ve tried looking around but can’t figure out if it’s possible to define reusable functions that accept cell references as parameters. It would save me a lot of time instead of writing the same complex formulas over and over again in different cells.
Google Apps Script is exactly what you need. Write custom JavaScript functions that work like any built-in formula. Go to Extensions > Apps Script, write your function, and save. For weighted averages, try function weightedAvg(value1, value2, weight1, weight2) { return (value1 * weight1 + value2 * weight2) / (weight1 + weight2); } then use =weightedAvg(B5, B6, 0.3, 0.7) in your cells. Functions accept cell references and ranges automatically. Quick setup, perfect for reusable calculations.
Absolutely! Apps Script custom functions are game changers - I’ve used them for years with repetitive calculations. They automatically refresh when cells change, just like regular formulas. The syntax is basic JavaScript and handles multiple parameters, including ranges. Start simple and build up complexity as you go. Once you save a custom function, it works across your whole spreadsheet. If you’ve got any programming background, the learning curve is tiny. Even without it, basic functions are pretty easy to create.
for sure! custom functions r super useful! just hit up the apps script from the ext menu and write your func like any js. oh, and put comments in there so they show up when you hover in sheets. just keep in mind, they can be slower with big data sets.