Hi,
Here are a couple options that might work for you.
Airtable already assigns numbers to stars so by creating a summary table whereby you link to each rating record you can then create a sum formula of those records that will total the star rankings.

You can see below that if you did want a separate column of numbers, one way would be the IF formula.

Hi,
Here are a couple options that might work for you.
Airtable already assigns numbers to stars so by creating a summary table whereby you link to each rating record you can then create a sum formula of those records that will total the star rankings.

You can see below that if you did want a separate column of numbers, one way would be the IF formula.

Hi,
I'm sorry, but I would consider such formula as a very bad practice.
In the case when you want to avoid zero values, you can do IF(Rating,Rating)
