Surgical Tool
Prostate Weight Calculator
Convert prostate volume to estimated weight using the standard tissue density (1.05 g/cc). Useful for surgical planning.
Volume to Weight Conversion
Enter the prostate volume in cubic centimeters (cc) or milliliters (mL).
cc
Don't know the volume? Calculate it first →
What is Prostate Weight and Why Does It Matter?
Prostate weight is calculated from volume measurements using the standard tissue density of approximately 1.05 g/cc. While volume (in cubic centimeters) is typically reported on imaging studies, surgeons often prefer thinking in weight (grams) for treatment planning.
The Conversion Formula
Weight (grams) = Volume (cc) × 1.05
Because prostate tissue is slightly denser than water
Why Surgeons Care About Weight
Prostate weight directly affects surgical decision-making:
- Procedure Duration: TURP removes ~1 gram/minute; larger glands mean longer surgeries
- Blood Loss Estimates: Expected blood loss correlates with tissue weight
- Procedure Selection: Certain techniques work best for specific weight ranges
Weight-Based Treatment Guidelines
| Weight Range | Size Category | Typical Procedures |
|---|---|---|
| < 30g | Small | UroLift, Rezum, TURP |
| 30-80g | Medium | Most options available including TURP, GreenLight |
| 80-150g | Large | HoLEP preferred, simple prostatectomy |
| > 150g | Very Large | HoLEP at expert center, robotic simple prostatectomy |
Related Articles
- Why Prostate Weight Matters for Surgery
- TURP vs HoLEP: Choosing Based on Size
- Large Prostate Treatment Options
- The Science Behind the Conversion
- How Weight Affects Medication Choices
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- PSA Density Calculator - Adjust PSA for size