Organ Weight Calculator

In forensic pathology and autopsy medicine, knowing the expected weight of major organs helps determine whether findings are normal or pathological. Enter the deceased's age at death, gender, height, and body weight into the Organ Weight Calculator to get reference weights for the heart (at 50th and 95th percentiles), liver, kidneys, and brain. BMI is also calculated as a secondary output.

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Gender *

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Results

Heart Weight (95th Percentile)

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Heart Weight (50th Percentile)

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Expected Liver Weight

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Combined Kidney Weight

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Expected Brain Weight

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Body Mass Index

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Frequently Asked Questions

What are normal organ weights at autopsy?

Normal organ weights vary based on body size, age, and gender. Heart weights typically range from 200-400g, liver 1000-1800g, kidneys 120-170g each, and brain 1200-1500g. These calculators use reference data from large autopsy studies.

How accurate are organ weight predictions?

These calculations are based on large reference populations and provide percentile-based estimates. They're most accurate for adults aged 18-65 with normal body composition. Results should be interpreted by qualified pathologists.

What does the 95th percentile mean for organ weights?

The 95th percentile represents the upper limit of normal - only 5% of the reference population had organ weights above this value. Weights exceeding this may indicate pathological enlargement.

Can this calculator be used for children?

While the calculator accepts pediatric ages, it's primarily validated for adults. Pediatric organ weights follow different growth patterns and require specialized reference ranges.

What factors affect organ weights at autopsy?

Organ weights are influenced by body size, age, gender, disease states, edema, blood pooling, and post-mortem changes. Fresh organ weights may differ from those after fixation.

How should I cite this organ weight data?

Results are based on published autopsy studies. Always cite the original research and consult current literature for the most up-to-date reference ranges for your specific population.

What is considered cardiomegaly at autopsy?

Cardiomegaly is typically defined as heart weight exceeding the 95th percentile for the patient's body size, age, and gender. However, clinical correlation and gross examination are essential for diagnosis.

Are these calculations suitable for forensic pathology?

Yes, these calculations are commonly used in forensic pathology to assess whether organ weights fall within expected ranges, helping to identify potential pathological conditions.