How much output is normal for an ileostomy?

About 600 to 1,200 mL a day once the ileostomy has settled, according to a review from St Mark's Hospital. Output is often higher in the first weeks after surgery.

What counts as a high-output stoma?

There is no single definition. Published thresholds range from more than 1 litre to more than 2 litres a day, and a 2025 nurse consensus agreed volume alone should not define it, because symptoms of dehydration matter as much as the number.

What are the signs of dehydration with an ileostomy?

Thirst or a dry mouth, less urine or dark urine, dizziness when standing, headache, tiredness, and cramping or tingling in the hands and feet. Any of these means contact your stoma nurse or doctor today.

When should I go to A&E with an ileostomy?

Get urgent care if you faint, become confused or pass hardly any urine, or if your stoma stops working with cramping pain, swelling or vomiting, which can be a blockage.

Should I drink more water if my stoma output is high?

Not without advice. With a high output, guidance restricts dilute drinks such as water, tea and coffee and uses a glucose and salt solution instead. Ask your stoma team about an oral rehydration solution.

How do I measure my stoma output without a jug?

Count how many times you empty the bag in 24 hours and multiply by the rough amount one empty holds. Measuring one empty in a jug once gives you a figure to reuse.

Is high output normal soon after ileostomy surgery?

It is common. In a UK series, 16% of ileostomies and jejunostomies had an output over 2 litres a day within 3 weeks of surgery, and about half settled without ongoing treatment. Keep your stoma team informed while it settles.

Your answers are used to work out the result and email it to you. The tool does not create an account or save your answers to a medical record.

Ileostomy Output Checker: Is My Output High?

See where your stoma output sits, and when it needs a call.

Free
About 2 minutes
No account
Updated October 3, 2026

The short answer

A settled ileostomy typically puts out about 600 to 1,200 mL a day. Problems with dehydration generally start above 1.5 to 2 litres a day, though definitions of a high-output stoma vary from more than 1 litre to more than 2 litres, and how you feel matters as much as the number. Thirst, dark or reduced urine, dizziness on standing or cramps mean contact your stoma nurse or doctor today; fainting, confusion or hardly any urine mean urgent care now.

What kind of stoma do you have?

How do you want to enter your output?

What is the output mostly like?

Do you have any of these right now? Tick all that apply.

Unusual thirst or a dry, sticky mouthPassing less urine than usual, or dark, strong-smelling urineDizzy or light-headed when you stand upCramping or tingling in your hands or feetHeadache, or unusually tired and lowFainted, or feel you are about to faintConfused, very drowsy, or others say you are not yourselfHardly passed any urine todayStoma has stopped working, with cramping tummy pain, swelling or vomiting

How long ago was your stoma surgery?

How to use the Ileostomy Output Checker

1Choose your stoma type.
2Enter your output over 24 hours, or how many times you emptied the bag and roughly how much each time.
3Describe the consistency and tick any signs of dehydration or blockage.
4See where your output sits against published figures, and whether to call your stoma team today or get urgent help.

How much ileostomy output is normal?

Once an ileostomy has settled, a review from St Mark's Hospital puts normal output at 600 to 1,200 mL a day. There is no single agreed line for high output. The same review says dehydration generally occurs above 1.5 to 2 litres a day, and stresses that it depends on how much you eat and drink: 2 litres out with 4 litres in may cause no problem, while the same output with half a litre in will dehydrate you.

24-hour output	What published sources say
600 to 1,200 mL	Normal for an established ileostomy (Nightingale 2022)
Over 1,000 mL	Used as the high-output line by some sources (Carr 2025)
Over 1,500 mL	Used by other sources; dehydration generally starts above 1.5 to 2 litres (Nightingale 2022; Carr 2025)
Over 2,000 mL	High-output stoma definition in a UK series of 687 stomas (Baker 2011)

Signs of dehydration with a stoma

A 2025 international consensus of stoma nurses agreed that high-output stoma syndrome cannot be defined by volume alone, and listed the signs that matter. Any of them means contact your stoma nurse or doctor today. Dehydration is the most common reason for readmission after a diverting loop ileostomy: in a series of 603 people it caused 43% of readmissions within 60 days.

Sign	What to do
Watery output, emptying or changing the pouch more than usual, leaks	Tell your stoma nurse
Thirst or a dry, sticky mouth; less urine, or dark, strong-smelling urine	Contact your stoma nurse or doctor today
Dizzy on standing, headache, tiredness, cramping or tingling in hands and feet	Contact your stoma nurse or doctor today
Fainting, confusion, hardly any urine	Urgent care now
No output with cramping pain, swelling or vomiting	Urgent help now: possible blockage

How to measure output

The simplest way is to empty into a measuring jug for 24 hours. If that is not practical, count how many times you empty and work out roughly what one empty holds. Our guide to tracking food triggers with an ostomy covers what to log alongside it, including drinks and urine.

The change from your own usual matters more than any printed number. A sudden rise can come from a stomach bug, a flare upstream of the stoma, or a partial blockage, which is why a high output that will not settle needs your stoma team, not just more fluid.

Output, food and blockages

Food changes output, but it is not the only thing. Foods that cause ileostomy blockage covers which foods are implicated and why anatomy matters more. If you are weighing up surgery, j pouch vs ostomy compares life with each, including hydration.

Frequently asked questions

How much output is normal for an ileostomy?: About 600 to 1,200 mL a day once the ileostomy has settled, according to a review from St Mark's Hospital. Output is often higher in the first weeks after surgery.
What counts as a high-output stoma?: There is no single definition. Published thresholds range from more than 1 litre to more than 2 litres a day, and a 2025 nurse consensus agreed volume alone should not define it, because symptoms of dehydration matter as much as the number.
What are the signs of dehydration with an ileostomy?: Thirst or a dry mouth, less urine or dark urine, dizziness when standing, headache, tiredness, and cramping or tingling in the hands and feet. Any of these means contact your stoma nurse or doctor today.
When should I go to A&E with an ileostomy?: Get urgent care if you faint, become confused or pass hardly any urine, or if your stoma stops working with cramping pain, swelling or vomiting, which can be a blockage.
Should I drink more water if my stoma output is high?: Not without advice. With a high output, guidance restricts dilute drinks such as water, tea and coffee and uses a glucose and salt solution instead. Ask your stoma team about an oral rehydration solution.
How do I measure my stoma output without a jug?: Count how many times you empty the bag in 24 hours and multiply by the rough amount one empty holds. Measuring one empty in a jug once gives you a figure to reuse.
Is high output normal soon after ileostomy surgery?: It is common. In a UK series, 16% of ileostomies and jejunostomies had an output over 2 litres a day within 3 weeks of surgery, and about half settled without ongoing treatment. Keep your stoma team informed while it settles.
Is my result stored?: Your answers are used to work out the result and email it to you. The tool does not create an account or save your answers to a medical record.

How to Track Food Triggers With an Ostomy
With a stoma, Bristol types stop working and reactions show up in hours, not days. What to log instead, how to read output timing, and how to test a food.
Foods That Cause Ileostomy Blockage: The Evidence
Corn, nuts, popcorn, skins and casings top every list, but the strongest evidence on ileostomy blockage points at anatomy, not food. What actually matters.
J Pouch vs Ostomy: What Head-to-Head Studies Show
Neither a j pouch nor a permanent ileostomy wins on overall quality of life. The pouch brings more complications; the bag, a stoma for life. How to choose.
What to Expect After J Pouch Surgery
Recovery after j pouch surgery runs in stages: the operations, the temporary stoma, takedown, then a pouch that keeps adapting for a year or more. What is normal at each step.

Sources

Nightingale JMD. How to manage a high-output stoma. Frontline Gastroenterol. 2022;13(2):140-51. doi:10.1136/flgastro-2018-101108
Baker ML, Williams RN, Nightingale JMD. Causes and management of a high-output stoma. Colorectal Dis. 2011;13(2):191-7. doi:10.1111/j.1463-1318.2009.02107.x
Carr M, Caers F, Waugh D, Purnell P, Gray M. Redefining the high-output stoma and its bearing on clinical practice: results of an international consensus panel. J Wound Ostomy Continence Nurs. 2025;52(5):384-91. doi:10.1097/WON.0000000000001207
Messaris E, Sehgal R, Deiling S, Koltun WA, Stewart D, McKenna K, et al. Dehydration is the most common indication for readmission after diverting ileostomy creation. Dis Colon Rectum. 2012;55(2):175-80. doi:10.1097/DCR.0b013e31823d0ec5

Cite this tool

Clairop. Ileostomy Output Checker. www.clairop.com/tools/ileostomy-output-checker. Updated October 3, 2026.

Clairop is a general wellness app for people living with a diagnosed digestive condition. It does not replace professional medical care, diagnosis, or treatment. Always follow your healthcare provider's advice.

Clairop logs meals, symptoms and stool in seconds, then looks for the foods your gut reacts to, including reactions that land days later.

More free tools

All free tools