Background info:
I was trying to use the same system for Sims 4 chemistry using my personality profiles as Sims 2. But that version is just weird. I could never remember how many points anything on the same side of the scale was. It was: +7, +6, +5, +3, +2. Where’d 4 go?! And then when they were on opposing sides of the scale you would subtract the difference. Which is simple enough but it could only go up to -7. Cyjon explained why it was that way in Sims 2 in Personality and Chemistry but a lot of it doesn’t make much sense. But really, why do we need to follow the way it was exactly? This isn’t personality points. This is a profile and is much more in-depth. So, I sat down and made a new chemistry chart:

- There are no 5’s so we’re just determining which side of the scale they are to each other.
- Differing sides are subtracted. So, someone who is a total neat freak N10 will have a -10 chemistry rating with a lazy slob N0.
- If they are on the same side of the scale there is a positive result.
+10 Same Number
+8 One different
+6 Two different
+4 Three different
+2 Four different
So, you’d look at the two profiles. Here’s an example:
N6-S6-A8-P7-N10-L/C3-E6
N7-S3-A8-P7-N10-L/C7-E9
+8/-3/+10/+10/+10/-4/+4= +39 (2 bolts)
I’ve found it’s easier for me to do this on paper. All the numbers kinda blend together on the computer monitor. Below is my scoring chart. Getting a 3 bolt result even with what I’d consider very compatible sims is rare. I try to aim for the 2 bolt range.
Scoring:
+55 to +70= 3 bolts
+25 to +54= 2 bolts
-25 to +24= 1 bolt
-26 to -54= Neutral
-55 to -70= Dislike