RO Membrane Performance Calculator

* Special thanks to Boomer from www.reefcentral.com for his help.

Tap Water TDS:
 Parts-Per-Million

RO Membrane Output TDS*:
 Parts-Per-Million

Tap Water Pressure:
 psi

Tap Water Temperature:
 

RO Membrane Size:
 Gallons-Per-Day (GPD)



RO Membrane Performance:
 Gallons-Per-Day (GPD)

RO Membrane Rejection Rate:
 %

* This field is not necessary to determine the membrane performance, but it is required to determine the membrane rejection rate. You can leave this field as is if you haven't measured it, but in that case ignore the calculated rejection rate.

This calculator is only valid for membranes rated at 250 OEM TDS, like the DOW FilmTec. Note that many other
brands
are just re-packaged FilmTecs.