Free pond calculators
Waterfall Pump Flow Calculator
Find the pump flow your waterfall needs from its width, then work out the head to choose your pump.
Your waterfall
Enter a number greater than 0.
Enter a number greater than 0.
The highlighted line shows what each box measures. Your numbers appear on the drawing.
Your results
Enter your waterfall width to see the pump flow it needs.
0GPHPump flow needed at the top of your falls
- For the waterfall
- 0
- Half your pond per hour
How we calculate this
- EasyPro: about 36 gallons per minute per foot of waterfall width makes a 1-inch-thick sheet of water, an average flow for homes.
- Aquascape: 125 gallons per hour per inch of waterfall width, a lighter sheet.
- We also check the pump moves at least half your pond per hour, the same rule as our pond calculator.
- A pump's flow drops as it lifts water higher, so check your total head next.
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