mass flow from pressure sensor?

hi, i want to make a volumemetric flow from ths site . but i still dont understand about the equation… anyone can tell me more about how to calculate mass flow from output of pressure sensor mpx series?

The instructable gives you the answer to your question. It might beg another few questions but it goes the process step by step.

Just use the equation. Remember to use SI units throughout for everything. They multiply by 1000
to convert kg to grams. rho for air is about 1.2 kg/m^3, and 1 square cm is 1e-4 m^2