https://en.wikipedia.org/wiki/Suction_cup

A suction cup, also known as a sucker, is a device or object that uses the negative fluid ... Using the force formula (F = AP), the result is F = (0.0013 m2)( 100,000 Pa) = about 130 newtons. The above formula relies on several assumptions:.

https://www.schmalz.com/en/vacuum-knowledge/the-vacuum-system-and-its-components/system-design-calculation-example/theoretical-holding-force-of-a-suction-cup/

For suction cups that have an explicitly specified lateral force on a dry or oiled surface, the friction coefficient μ can be calculated using the following formula:.

https://www.vaccon.com/documents/vaccon-vacuum_cup_selection_guide.pdf

Example: Holding Force Calculation for Non-Porous Materials .... The magnitude of suction created by a vacuum pump typically measured in inches of mercury ...

https://www.hydraulicspneumatics.com/200/TechZone/Vacuum/Article/False/6460/TechZone-Vacuum

Hg. However, calculating work forces or changes in volume in vacuum systems ... single- and multi-stage vacuum generators, valves, switches, suction cups, etc.

https://www.conestogaworks.com/articles/Calculating%20the%20lifting%20force%20of%20suction%20cups,%20Gast.pdf

In using this chart, keep in mind that it's best not to start with the smallest diameter suction cup you can buy, because you'll need lots of vacuum to make it work.

https://www.hydraulicspneumatics.com/200/TechZone/Vacuum/Article/False/21525/TechZone-Vacuum

Jun 27, 2006 ... When designing a vacuum system that will lift or hold with suction cups, begin the ... The system then can work at a lower level of vacuum force. ... Ancillary components also are factors in in the vacuum-system equation.

https://sciencing.com/how-7726588-calculate-suction-pressure-pump.html

Nov 26, 2018 ... You can calculate suction pressure expressed in feet for a water distribution system ... (1 pound of force applied to 1 square inch of area = 1 psi.) ...