PromptLoop | Using the formula

PromptLoop works by using a set of input and output examples to inform the model what the output should look like. This structure can drive a huge variety of outputs and solutions and therefore is the most commonly used.

Formula Syntax

The parameters, (inputs, outputs, target cell etc.) work just like any other spreadsheet formula. You can think of PromptLoop like a LOOKUP formula - but instead of matching rows it infers the relationship in your input/output table and returns the result.

This simple formula takes a set or column of Inputs and a set or column of Outputs and returns the output for an new input or Target.

📝 Formula Syntax

=PROMPTLOOP( inputRange, outputRange, target)

  • InputArray is the set of 3-10 rows of inputs for the example data. The inputs must match the outputs in length and should be fixed for each task. This tells the model what you are looking for. Examples should be representative.
  • OutputArray is the set of 3-10 rows matching outputs for the example data. The outputs must match the inputs in length and should be fixed for each task. This tells the model what you outputs you are looking for.
  • Target is the input for the model to perform its calculation on. This is always a single cell but you can copy or drag a formula with set input/output Arrays across hundreds of targets to leverage the same function and output task.

Select Examples

PromptLoop is made for text transformations. When working with numbers it is still easiest to use the formulas you are used to.

🔄 Select example rows + Select target cell

Example Gif

🔎 Tip: Set Fixed examples for Input/Ouput pairs

Set absolute reference like: $A$10:$A$11,$B$10:$B$11 on the examples and use them for the rest of your task

To start using the formula. Set up the formula with the link below or see the guide here.

⚠️ Activate in each new Sheet

You must activate PromptLoop in any sheet you want to use the formula in. Navigate to the Add-on menu and click "Activate" to do so. More on enabling PromptLoop

🚩 Error Messages:


This error message indicates that the inputs and/or output examples are not correctly formatted. For Promptloop to work - you must provide pairs of inputs and outputs, usually on the same row, as examples. You can include multiple columns combined as one input or output row, but they may not contain undefined values, blank cells, or #ERRORS!.


This message occurs when the Google Account being used is not linked to an active Promptloop account. It also may indicate that payment method is needed, even if free credits still remain on the account.


This error message indicates that PromptLoop is not Activated in this sheet - Navigate to the Add-on menu and activate or Re-activate to proceed. You may have to reload the sheet and delete / re-enter the formula if this persists.

Need Help?

Reach out to and we will be happy to guide you through detailed set up and get started with a few examples so you can start using prompt loop for your specific needs. Or just say hello!

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