How tall is the Saturn V set in LEGO units (studs, bricks etc.)? I'm building a MOC to scale with the Saturn V set and am having trouble figuring out how tall the 1st stage engines are but the entire thing would be really helpful! Thanks!
I've been contemplating this question for quite a while.  In the great tradition of this site I felt this needed practical verification.  I decided to make a ruler based on scaling up set 5005107, LEGO Buildable Ruler to measure the Saturn V myself.

tl;dr

| STAGE             | Studs Tall | Bricks Tall |
|-------------------|------------|-------------|
| S-IC first stage  | 52.2 studs | 43.8 bricks |
| S-II second stage | 33.8 studs | 28.3 bricks |
| S-IVB third stage | 50.5 studs | 42.1 bricks |


My conversions are not perfect based on the calculator, but they're close enough that I don't think I messed up anything.

Overall

As we know, this is a huge set.  I needed my ruler to be >32 studs tall to measure any of the stages.  Here's my setup:



I've included pictures of the bottoms of the rockets since they nest somewhat so you can see how tall the rocket engine part ends up being versus the entire shell of the rocket.

S-IC first stage

The bottom:


The top:


I read that as 52.2 studs or 43.8 bricks tall.

S-II second stage

The bottom:


The top:


I read that as 33.8 studs or 28.3 bricks high.

S-IVB third stage

The bottom:


The top:


I read that as 50.5 studs or 42.1 bricks tall.