Step 1 Enter system parameters

Step 2 Enter feed water parameters

Step 3 Set rotameter values
Enter Drain flow and Recycle flow in LPM.
Start with half of the maximum flow shown below each field.
Then click Calculate to see the system performance and warnings.
If needed, adjust the drain and recycle flow values and calculate again until the results are optimal.

 

 
 

Calculate
Results
Feed water flow
 
m³/h
 
LPM
Permeate flow
 
m³/h
 
LPM
Permeate TDS
 
ppm
Recovery
 
%
Operational pressure
 
bar
Сomments:
 
The calculation is made for NaCl solution. The actual values may differ from the calculation results depending on the ionic composition of the source water and the state of the membrane elements.

Download Report

 

FAQ

  • An RO calculator is an online tool that helps you estimate and configure the performance of a commercial reverse osmosis system. It uses feed water data and system settings to calculate key parameters such as permeate flow, recovery rate, concentrate flow, salt rejection, and expected water quality.

     

    The calculator is useful for preliminary system selection and setup planning. It helps water professionals understand how an RO system may perform under specific operating conditions, but it does not replace a detailed engineering design or final technical assessment.

  • A Commercial Reverse Osmosis System Calculator is used to estimate how an Ecosoft commercial RO system may perform under specific operating conditions. It helps calculate key parameters such as permeate flow, concentrate flow, recovery rate, salt rejection, and expected product water quality based on feed water data and system settings.

     

    The calculator supports preliminary system selection, configuration, and service checks. It can help water professionals compare different operating conditions, adjust flow settings, and better understand how changes in feed water TDS, temperature, pressure, or recovery may affect system performance. The results should be used as a planning and support tool, not as a replacement for final engineering design or certified hydraulic calculation software.

  • The RO Membrane Flow Calculator estimates system performance based on feed water data, membrane parameters, and selected operating settings. It compares the feed flow, permeate flow, and concentrate flow to calculate the recovery rate and expected productivity of the RO system.

     

    The calculator also takes into account key factors that affect membrane performance, such as feed water TDS, pressure, temperature, and salt rejection. This helps water professionals understand how the system may behave under different conditions and adjust the configuration before installation, commissioning, or service.

  • To use the RO Calculator, you need to enter the main system, membrane, and feed water data. This includes the RO system model, membrane type and condition, permeate tank type, feed pressure, water temperature, feed water TDS, and water source type.

     

    You also need to enter the hydraulic settings, such as the concentrate and recirculation rotameter values. Based on these inputs, the calculator estimates the expected flow rates, recovery, and system performance under the selected operating conditions.

  • To calculate the required RO membrane flow rate, you need to know the target permeate flow and the expected concentrate flow. The RO Calculator uses these values to estimate the total feed flow required for the system.

     

    It also checks the recovery rate, which shows how much of the feed water becomes purified water. This helps you understand whether the selected settings are realistic for the membrane and operating conditions.

  • Membrane flow rate in a reverse osmosis system shows how much water passes through the RO membrane and becomes permeate. In practice, it helps estimate the system’s productivity and understand how much purified water the membrane can produce under specific operating conditions.

     

    The membrane flow rate depends on several factors, including feed water pressure, temperature, TDS, membrane condition, and system recovery. It should always be assessed together with the concentrate flow and overall system settings to make sure the RO system operates efficiently and within the recommended range.

  • Recovery rate in the RO Calculator shows what percentage of feed water is converted into purified water, or permeate. A higher recovery means that more of the incoming water becomes product water, while less water leaves the system as concentrate.

     

    However, recovery should not simply be set as high as possible. If the recovery rate is too high for the feed water quality and operating conditions, minerals can become more concentrated inside the system and increase the risk of scaling. The calculator helps check whether the selected recovery is realistic for the system setup.

  • No, this RO Calculator is not suitable for industrial water treatment systems. It is designed for Ecosoft commercial reverse osmosis systems and helps estimate their performance, adjust operating settings, and support preliminary configuration for commercial RO applications.

     

    Industrial water treatment systems require project-specific engineering calculations, detailed hydraulic assessment, and verification according to the actual system design and operating conditions. The commercial RO Calculator should not be used to size, configure, or evaluate industrial RO systems. If you need help with an industrial water treatment project, please contact us and our team will help you choose the right solution.

  • No, this calculator is not intended for domestic drinking water reverse osmosis systems. It is designed for Ecosoft commercial reverse osmosis systems and helps estimate their performance under selected operating conditions.

     

    For domestic drinking water RO filters, use the product documentation or selection tools created specifically for that product category. The commercial RO calculator should not be used to size, configure, or evaluate domestic RO systems.

  • The RO Calculator provides estimated results based on the input data and selected operating settings. It is useful for preliminary system selection, configuration, and performance checks, but it should not be treated as an exact prediction of real system operation.

     

    Actual performance may vary depending on feed water quality, temperature, pressure, membrane condition, installation, and hydraulic settings. For this reason, calculator results should always be checked against real system measurements during commissioning or service.