How Much Does A Gallbladder Weigh?

The tissue of an adult gallbladder, drained and weighed on its own, comes in at roughly 8 to 10 grams. That is about the weight of two US nickels. Filled with bile, which is the state it spends most of its day in, the whole organ runs closer to 50 to 70 grams, or roughly one large chicken egg.

Two numbers, not one. Almost every confusing answer you will find on this question comes from someone quoting one of them without saying which.

Reference Figures, And Where They Come From

The most carefully specified numbers available come from an unexpected place: radiation dosimetry. To calculate how much radiation a given organ absorbs, physicists need agreed-upon masses for every structure in the body. Hence, the International Commission on Radiological Protection maintains a set of reference anatomical values for the adult male and female body. Its table separates the gallbladder into two entries:

For scale, the same table puts the liver at 1,800 g in the reference male. The gallbladder wall is roughly one-hundred-eightieth of that. Even at its fullest, the entire organ accounts for less than a tenth of one percent of body weight.

Worth saying plainly: these are reference values engineered for consistency across calculations, not measurements averaged from thousands of real gallbladders. They are the best-specified figures in existence for this question, which is not the same thing as being the last word on any individual.

Why The Internet Gives You Four Different Answers

Search this question, and you will collect a set of confidently stated, mutually incompatible numbers: 30 grams here, 50 grams there, 50 to 60 grams somewhere else, usually with no source attached. Most of that spread is the wall-versus-contents confusion above, repeated and amplified until it looks like consensus.

There is a second reason the number is slippery, and it is more interesting. The gallbladder is essentially never weighed as a routine measurement. Standard autopsy organ weight tables, the reference works pathologists actually use, cover the brain, heart, lungs, liver, spleen, and kidneys. The gallbladder is not on the list because its weight tells a pathologist almost nothing that its dimensions, wall thickness, and contents do not tell them better. Surgeons removing one do not put it on a scale either. So there is no large body of real-world measurements to average, which leaves the field open to numbers that get copied rather than checked.

What The Organ Holds Is Most Of What It Weighs

The gallbladder is a bag, and a bag weighs what you put in it. StatPearls describes the adult gallbladder as a pear-shaped organ of roughly 7 to 10 cm in length and about 4 cm in width, sitting in a fossa on the undersurface of the liver, with a wall that is distensible enough to enlarge substantially when the cystic duct is obstructed. Typical fasting capacity is usually quoted at 30 to 50 mL. Bile is about 97 percent water, so millilitres and grams are close enough to be interchangeable here.

That is why the same person’s gallbladder does not weigh the same thing twice. It fills between meals as the liver drips bile into it, concentrates that bile by pulling water back out, then squeezes most of it into the duodenum when a fatty meal arrives. Someone scanned after an overnight fast and the same person scanned an hour after a fried breakfast are, in weight terms, two different measurements.

Variation between people is substantial too. A 2025 scoping review of gallbladder ultrasound measurements found that gallbladder size is highly variable and can exceed 10 x 4 x 4 cm, particularly with increasing age; that diabetes and obesity are associated with larger volumes and thicker walls; and that gallbladders with a maximal diameter under 3.5 cm are described as micro-gallbladders. A normal wall measures under 3 mm.

Some Comparisons That Actually Land

Numbers in grams are hard to feel. These may help:

• The drained organ, at roughly 10 g, weighs about the same as two US nickels, a AAA battery, or two sheets of A4 paper.
• Filled, at roughly 60 g, it is about one large egg in its shell, or a small kiwifruit.
• A human heart weighs around 330 g in the reference adult male, so about five full gallbladders.
• The bile inside it at any moment would roughly fill a shot glass.

How Much Disease Adds

A gallbladder that ends up in a specimen pot is usually not a normal one, and it will not weigh a normal amount.

Stones contribute real mass. A population-based study in Shanghai that weighed patients’ stone burden found a mean gallstone weight of 2.8 grams in people with gallstones, rising to 4.9 grams among those who went on to develop gallbladder cancer, a difference the authors found statistically significant. So stones can easily add a third again to the weight of the organ tissue itself, and heavy stone burdens go well past that.

Obstruction adds more. When a stone blocks the cystic duct, the gallbladder distends with mucus or bile and can swell to several times its usual volume, a state called hydrops or mucocele. Chronic inflammation works in the other direction on volume but adds tissue: repeated attacks scar and thicken the wall, so a chronically inflamed gallbladder can be small, stiff, and heavier per centimetre than a healthy one. In one review of 1,131 laparoscopic cholecystectomy specimens, chronic inflammation was the single most common histological finding, ahead of purulent cholecystitis and stones alone.

None of this makes weight a useful measure of how sick the organ was. A 200-gram gallbladder packed with stones may have caused less trouble than a normal-sized one with an early malignancy in the wall.

No, You Will Not Weigh Less After It Is Removed

This is the question underneath the question for a lot of people searching this, and it deserves a direct answer. Sixty grams is 0.08 percent of a 75 kg body. It is less than the variation you would see stepping on the scale before and after a glass of water. Post-operative fluid retention, reduced movement, and swelling will swamp it completely in the days after surgery.

If anything, the long-term literature points the other way. A review in Laboratory Investigation summarising the epidemiological links between cholecystectomy and metabolic syndrome notes emerging evidence that gallbladder removal is associated with a higher risk of dyslipidemia, fatty liver disease, and impaired glucose handling, alongside older observations of weight gain after surgery. That evidence is associative and heavily confounded, since the people who need the operation already carry more metabolic risk than those who do not. Nobody should read it as a reason to keep a diseased gallbladder. It is a reason to expect that surgery changes nothing helpful about the number on your scale.

What A Pathology Report Actually Tells You

If you have a copy of your own report and you were hoping to find a weight in it, you probably will not. The gross description will typically record the specimen’s dimensions, the wall thickness, the appearance of the mucosa, and the number, size, and character of any stones. Some labs record a specimen weight; many do not, precisely because it is not diagnostically useful.

The parts that are worth reading are the wall thickness, any mention of metaplasia or dysplasia, and the final histological diagnosis. If the report includes a term you do not recognise, that is a good question for the surgeon at your follow-up appointment rather than for a search engine, since the same word can mean routine or significant depending on what else is in the specimen.

Signs That Deserve Attention, Whatever The Organ Weighs

The gram count is trivia. What is worth knowing about your gallbladder is when it needs looking at.

Get assessed promptly for steady upper right abdominal pain that lasts more than a few hours, especially after a heavy or fatty meal, and particularly when fever, chills, vomiting, yellowing of the skin or eyes, dark urine, or pale stools accompany it. The NIDDK describes these gallbladder attacks as typically striking in the evening or overnight, and notes that once you have had one, more usually follow. Pain plus fever or jaundice is not a wait-and-see situation.

On reducing the odds of getting there in the first place, two evidence-backed points are worth more than most of the advice circulating online. Being overweight raises gallstone risk, but so does losing weight very rapidly, because crash dieting changes bile composition and slows gallbladder emptying. Cleveland Clinic’s patient guidance on gallstones covers the same ground. A gradual rate of loss, regular meals rather than long fasts, and adequate dietary fiber and healthy fats are the practical version of that. If you are on a medically supervised rapid weight loss program or have had bariatric surgery, gallstone risk is a specific thing to raise with your team, since some patients are prescribed ursodeoxycholic acid to reduce it.

Disclaimer: This article is for general information and education only. It is not medical advice and is not a substitute for assessment by a qualified clinician. Anatomical reference values describe idealised averages and do not describe any individual. If you have abdominal pain, jaundice, fever, or concerns about your gallbladder, seek medical care rather than relying on general information.

References

• International Commission on Radiological Protection. Basic Anatomical and Physiological Data for Use in Radiological Protection: Reference Values. ICRP Publication 89. Ann. ICRP 32(3-4), 2002. Available at: https://www.icrp.org/publication.asp?id=icrp+publication+89
• Kim, C.H., Yeom, Y.S., Petoussi-Henss, N., et al. Adult Mesh-Type Reference Computational Phantoms. ICRP Publication 145. Ann. ICRP 49(3), 2020. Table 4.2, reference masses of organs and tissues. DOI: 10.1177/0146645319893605 (This publication reproduces the ICRP Publication 89 reference organ masses cited above.)
• Jones, M.W., Small, K., Kashyap, S., Deppen, J.G. “Anatomy, Abdomen and Pelvis: Gallbladder.” StatPearls [Internet]. Treasure Island, FL: StatPearls Publishing. Available at: https://www.ncbi.nlm.nih.gov/books/NBK459288/
• Möller, K., et al. “Ultrasound of the Gallbladder: An Update on Measurements, Reference Values, Variants and Frequent Pathologies. A Scoping Review.” Life, 2025;15(6):941. DOI: 10.3390/life15060941. Available at: https://www.mdpi.com/2075-1729/15/6/941
• Hsing, A.W., Gao, Y.T., Han, T.Q., et al. “Gallstones and the risk of biliary tract cancer: a population-based study in China.” British Journal of Cancer, 2007;97(11):1577-1582. DOI: 10.1038/sj.bjc.6604047. Available at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2360257/
• Szpakowski, J.L., et al. “Unexpected pathological findings after laparoscopic cholecystectomy: analysis of 1131 cases.” Videosurgery and Other Miniinvasive Techniques, 2018;13(1):46-50. Available at: https://pmc.ncbi.nlm.nih.gov/articles/PMC5890837/
• Chen, Y., Wu, S., Tian, Y. “Cholecystectomy as a risk factor of metabolic syndrome: from epidemiologic clues to biochemical mechanisms.” Laboratory Investigation, 2018;98(1):7-14. DOI: 10.1038/labinvest.2017.95. Available at: https://www.nature.com/articles/labinvest201795
• National Institute of Diabetes and Digestive and Kidney Diseases. “Symptoms & Causes of Gallstones.” Available at: https://www.niddk.nih.gov/health-information/digestive-diseases/gallstones/symptoms-causes
• Cleveland Clinic. “Gallstones (Cholelithiasis): Symptoms, Causes & Treatment.” Available at: https://my.clevelandclinic.org/health/diseases/7313-gallstones