how big is a kidney

A typical adult human kidney is about the size of a clenched fist.

Quick Scoop

• Length: roughly 10–12 cm (about 4–5 inches).

• Width: about 5–7 cm (around 2–3 inches).

• Thickness: about 3–5 cm (around 1–2 inches).

• Shape: bean-shaped, with the left usually slightly larger than the right.

• Weight: roughly 115–175 grams per kidney in adults, depending on sex and body size.

In everyday terms, each kidney is about as long as a small grapefruit or large apple and as bulky as your own fist resting in your palm.

If your question is about a specific medical report or concern about kidney size, it’s important to discuss it directly with a doctor, because “normal” can vary by height, age, and overall body size.

TL;DR: One kidney ≈ 10–12 cm long, fist-sized, bean-shaped filter sitting in your lower back.

Information gathered from public forums or data available on the internet and portrayed here.