Average Weight of Human Organs

About This Dataset

Approximate average weights of the major internal organs in an adult, in grams. The liver is the heaviest internal organ, closely followed by the brain, while glands like the thyroid weigh only tens of grams. Figures are typical adult averages and vary by individual.

✨ AI Insight

The liver (≈1,500 g) is the heaviest internal organ, narrowly ahead of the brain (≈1,400 g), and the two together outweigh every other organ on the list combined. A clear gap separates that leading pair from the paired lungs (≈1,000 g), after which weights fall sharply into the hundreds of grams: heart and both kidneys sit around 300 g each, with the spleen (≈170 g) and pancreas (≈100 g) lighter still. The thyroid, at roughly 30 g, is about fifty times lighter than the liver, underscoring how organ mass scales with function - large metabolic and filtration organs dominate, while regulatory glands are tiny. Note the skin, the body's single largest organ, is excluded here as it is a surface tissue rather than an internal organ.

Source: Reference organ weight tables (pathology averages)

Key Findings

Auto-computed highlights from this dataset

🏆

Liver leads with 1,500 in All Time.

📊

Average value in All Time: 600 · median: 300.

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Gap in All Time: Liver is 50× larger than Thyroid.