1. What is Normal Kidney Volume?

Definition: This calculator estimates normal kidney volume in milliliters using ellipsoid formula (1 cm³ = 1 ml).

Purpose: Helps medical professionals assess kidney size and volume for diagnostic purposes.

2. How Does the Calculator Work?

The calculator uses the ellipsoid formula:

Where:

• \( V \) — Volume of kidney (ml)
• \( L \) — Length (cm)
• \( W \) — Width (cm)
• \( H \) — Height (cm)

Explanation: The formula approximates kidney volume by treating it as an ellipsoid shape.

3. Importance of Kidney Volume Measurement

Details: Kidney volume assessment helps in diagnosing conditions like renal atrophy, hypertrophy, or polycystic kidney disease.

4. Using the Calculator

Tips: Enter kidney dimensions in centimeters from ultrasound or CT measurements. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is normal kidney volume range?
A: Typically 100-200 ml for adults, but varies with body size and age.

Q2: How accurate is this calculation?
A: It provides a good estimate but may differ from actual volume by 10-15%.

Q3: Which imaging modalities can provide these measurements?
A: Ultrasound, CT, or MRI can all provide the necessary dimensions.

Q4: Why use π/6 in the formula?
A: This is the volume correction factor for an ellipsoid shape (π/6 ≈ 0.5236).

Q5: How does kidney volume change with disease?
A: Volume decreases with atrophy and increases with conditions like hydronephrosis or cysts.