Bristol stool chart: the 7 types, in plain words
The Bristol stool scale sorts stools into seven types, from separate hard lumps (type 1) to entirely liquid (type 7). Types 3 and 4 are the usual middle. Types 1 and 2 suggest slow transit or constipation, and types 6 and 7 fast transit or diarrhoea. A one-off change is common; a change that lasts or comes with warning signs is worth checking with a doctor.
- Type 4
- Smooth and soft, like a sausage or snake
- The usual middle.
See a doctor for blood in or on the stool, black or tarry stools, a change lasting more than three weeks, or unexplained weight loss.
How it works
Why track it
One day says little. A pattern over a couple of weeks, next to fibre, water, sleep and stress, can show what helps you. Logging takes one tap.
When to see a doctor
Blood in or on the stool, black or tarry stools, a change in habit lasting more than three weeks, unexplained weight loss, or pain that will not settle. These need a professional, not an app.
Questions
What is a normal Bristol stool type?
Types 3 and 4 are the usual middle. Many people vary between days, which is normal.
How often should you poop?
Anywhere from three times a day to three times a week is common. A change from your own usual pattern matters more than a number.
What helps with type 1 and 2 stools?
Common first steps are more fibre (fruit, vegetables, whole grains, legumes), enough fluid and regular movement. If it persists, talk to a pharmacist or doctor.
Is it worth tracking bowel movements?
It can be useful for spotting patterns with food, sleep or stress, and for describing changes clearly to a clinician.
Related calculators
Sources
- Lewis SJ, Heaton KW. Stool form scale as a useful guide to intestinal transit time. Scand J Gastroenterol 1997
- NHS. Constipation
- NHS. Bowel cancer symptoms
Accurate as of November 12, 2026. Training and nutrition guidance only, not medical advice. See a clinician for symptoms, injury or a medical condition.
Your first brief is one entry away
Pick an objective, tell it how you eat, log one thing.