Pond Fill-Time Calculator
Free Calculator
Calculate how long a koi pond will take to fill
Enter the pond volume and your hose or source-water flow rate. If you do not know the flow rate, use the timed-container option to calculate it from a bucket test.
1. Pond volume
Don't know it? Calculate pond volume first.
2. Water flow
Estimated fill time
Actual fill time may change as household water pressure and simultaneous water use change. Recheck the flow periodically on long fills.
Timed bucket test
Use a container with a known volume, time how many seconds the hose takes to fill it, and enter both values. The calculator converts that test into gallons and liters per minute before estimating the pond fill time.
Calculator note
Do not leave a filling pond unattended. If your source water contains chlorine or chloramine, use an appropriate water-conditioning plan for the volume being added.