Pets calculator
What Aquarium Filter Size Do I Need?
Enter aquarium water volume, desired turnovers per hour, and flow loss factor to work out aquarium filter rated flow.
Enter your measurements
What Aquarium Filter Size Do I Need? Start with aquarium water volume, desired turnovers per hour, and flow loss factor. This minimum flow turns those measurements into aquarium filter rated flow, so you can compare real products or available space before making a decision.
- Aquarium water volume — Required
- Desired turnovers per hour — Required
- Flow loss factor — Required
Aquarium filter rated flow
Enter the measurements above to calculate aquarium filter rated flow.
How the calculation works
V17 calculation: requiredRatedFlow=tankVolume×turnoversPerHour×headLossFactor/3600. The result is reported as Aquarium filter rated flow.
Worked example
Example: Aquarium water volume = 200 L; Desired turnovers per hour = 2; Flow loss factor = 1. Result: Required Rated Flow = 0.11 L/s.
Before you decide
Use the finished, usable dimensions after trim, handles, skirting, packaging or other projections where relevant. This page calculates the stated geometry or quantity only; product-specific construction or installation details can still affect the final choice. For what aquarium filter size do i need, the limiting result on this page is aquarium filter rated flow.
Direct measurement/geometry calculation. No external reference is required for the arithmetic itself; the result is derived only from the user-entered measurements and the formula stored in calculationLogicJson.
Frequently asked questions
What does the Aquarium Filter Size calculator tell me?
It returns aquarium filter rated flow from the measurements entered on this page. The calculation is specific to aquarium filter size, so the result should be compared with the exact product or specification you are considering.
Which measurements should I take for aquarium filter size?
Measure aquarium water volume, desired turnovers per hour, flow loss factor. Use clear, usable dimensions rather than nominal room or product labels.
Should I round the aquarium filter rated flow?
Keep the calculated value for comparison, then choose a real product that meets or stays within the returned aquarium filter rated flow while allowing for the clearances, tolerances or ratings shown by its manufacturer.