I am not a horror reader, but there are some types of horror stories I can stand better than others, which is why they be reviewed. Since horror perception is very subjective, here's my personal scale to help you see how you'd position yourself regarding the horror levels.

Body horror

By body horror, I mean gore, violent deaths described in detail, dismemberment, gutting, etc. Please note that I'm usually comfortable with body horror up to 3 Ewws.
The body horror scale is described by "Ewws".

• 1 Eww: violent deaths. To be noted: I rarely mention body horror at 1 Eww. I review adult scifi and fantasy, and it implies regularly violent deaths.
  
• 2 Ewws: violent deaths and gore. I may mention it, particularly if there's one scene that I found to be quite violent in anotherwise mild story.
  
• 3 Ewws: violent deaths, gore and gutting, usually with details. But if it remains at 3 Ewws only, it means there are mitigating circumstances, like humour.
  
• 4 Ewws: violent deaths, gore, torture, with details and usually without mitigating circumstances. I may DNF at 4 Ewws.
  
• 5 Ewws: all of the above, and I feel the writer spends too much time detailing lovingly the body horror. It is usually a cause for DNFing.
  

Supernatural horror

By supernatural horror, I mean creepy houses, creepy kids, hauntings, zombies, things that go bump in the night, all the unseen that makes you tremble, scary clowns and scary dolls. I am a wimp when it comes to supernatural horror and I can only go up to 1 Eek.
The supernatural horror scale is described by "Eeks".

• 1 Eek: one haunted house or one creepy kid or one haunting.
  
• 2 Eeks: any of the above and/or zombies. I don't like zombies. I really don't like zombies. I usually DNF on those stories, though, occasionally, I can be caught into the story.
  
• 3 Eeks: any of the above and things that go bump in the night. I usually DNF pretty fast on those stories.
  
• 4 Eeks: any of the above and scary clowns and/or scary dolls. I don't even let those books enter my home!
  

Murky horror

What I call murky horror is very difficult to define. It's that sense of uneasiness, of something that leaves you vaguely (or frankly) nauseated, usually because it relates to torture, cannibalism, sexual violence for the sake of sexual violence, ... I tend to DNF pretty quickly on those books too.
The murky horror scale is described by "Ughs".

• 1 Ugh: I feel slightly nauseated but I'm willing to keep on reading because there are mitigating circumstances.
  
• 2 Ughs: any of the above, but without mitigating circumstances or without seeing where the writer is going to. I usually DNF very fast.