Use this calculator to determine your correct pump cylinder width.
Room for 10 to 15% expansion is recommended. Do not exceed over 30% of your current size.
General consensus is to measure your thickest point.
ATTENTION *** FOR MEN WITH WIDE BASES:Use your widest base girth.
If you are trying to change shape or would like to focus higher on the shaft, measure your mid-shaft instead, while ensuring your base will still fit. And if you are relatively more oval-shaped or flat, or curved, you might need to go up a size to make sure it fits.
Select Your Girth
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Fatigue Calculator
Use this calculator to target your proper fatigue levels.
Length:
Fatigue Target (out of device): 2-3% longer. Strain Target (in device): 4-6% longer.
Girth:
Expansion Target: 4-8% thicker.
* More is not better. Reaching for the max does not mean a better session.
Fatigue Target
2-3% longer (out of device)
Strain Target
4-6% longer (in device)
Expansion Target
4-8% thicker
Unit Converter Calculator
This calculator converts between inches and centimeters. Enter a value in inches or centimeters, and the corresponding value will automatically populate in the other field.
Pressure Converter Calculator
This calculator converts between kilopascals (kPa) and inches of mercury (inHg). Enter a value in either field, and the corresponding value will automatically populate in the other field.
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