Flow and Turnover Calculator





🌊 Flow Rate Converter





Convert pump, filter, powerhead flow rates instantly.


⚡ Presets:





    

        Litres per hour
        metric
    

    

        
        LPH
    

    




    

        Litres per minute
        metric
    

    

        
        LPM
    

    




    

        Litres per second
        metric
    

    

        
        LPS
    

    




    

        US Gallons per hour
        us
    

    

        
        GPH (US)
    

    




    

        US Gallons per minute
        us
    

    

        
        GPM (US)
    

    




    

        Imperial Gallons per hour
        uk
    

    

        
        GPH (UK)
    

    




    

        Imperial Gallons per minute
        uk
    

    

        
        GPM (UK)
    

    




    

        Cubic metres per hour
        metric
    

    

        
        m³/h
    

    




    

        Cubic metres per minute
        metric
    

    

        
        m³/min
    

    





🔄 Turnover Rate

Aquarium Flow Rate Converter & Turnover Calculator

This aquarium calculatior converts your filter or pump flow rate between all the usual units — LPH, GPH (US/UK), LPM, m³/h, you name it.

Just type any value, and it auto‑fills the rest.

It also shows your tank turnover — how many times per hour your filter cycles the entire water volume. Enter your tank size (gallons or liters), and you’ll instantly see if your flow is right for your setup.

Here’s a quick cheat sheet (turnovers per hour):

  • Regular community tank – 4–6
  • Cichlids – 6–10 (they’re messy)
  • Planted tank – 3–5 (gentle flow)
  • Reef tank – 10–20 (corals love current)

So next time you’re shopping for a filter or pump, this thing will save you from guessing. Bookmark it and you’re good.