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How long is a typical human nephron?

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Human kidneys — renal system Diagram showing the location of the kidneys in the abdominal cavity and their attachment to major arteries and veins.

A typical human nephron is a long, extremely fine tubule that measures approximately 30–55 mm (1.2–2.2 inches) in length.12

Each kidney contains about 1,000,000 of these functional units, which are responsible for producing urine by filtering blood and reabsorbing essential substances. While the general structure is consistent, the length of specific segments—particularly the loop of Henle—can vary depending on the nephron's location within the renal cortex.12