Tempo filtragem (vol/vazão)
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
About this calculator
This calculator estimates the time needed to fully filter a swimming pool, using the water volume and pump flow rate. The formula is straightforward: Time = Pool volume / Pump flow rate. It's useful for determining daily filtration schedules and ensuring water hygiene and system efficiency.
To use, input the pool's total volume (in liters or m³) and the pump's flow rate (in liters/hour or m³/hour). The result is a theoretical time estimate, which may vary based on actual pump efficiency, system clogging, and recirculation losses. Always add a safety margin for real-world conditions.
Example: A 40 m³ pool with a 5 m³/h pump will take 8 hours to filter completely. It's common to keep the system running 8-12 hours/daily for optimal cleanliness, even if the calculation shows less time. Avoid inconsistent units (e.g., mixing liters and cubic meters) to prevent errors.
Frequently asked questions
What units should I use for volume and flow rate?
Use liters or m³ for volume and liters/hour or m³/hour for flow rate. Ensure both units match (e.g., if volume is in m³, flow rate must be in m³/h).
Is the result accurate?
The calculation is a theoretical estimate. Real-world results may vary due to pump inefficiencies, filter clogging, or pressure losses.
Can I use it for irregularly shaped pools?
Yes, but use the pool's actual total volume based on its real geometry or volumetric measurements.
What if the calculated time is too low?
Increase filtration time by 20-30% to account for initial dirt or filter maintenance needs.