Pool Fill Time Calculator

Estimate how long it takes to fill a pool from its volume and the flow rate of the hose. Enter pool volume and flow rate to see fill time when you…

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Daily Uses

8 of 8 free uses remaining today

Estimate how long it takes to fill a pool from its volume and the flow rate of the hose. Enter pool volume and flow rate to see fill time when you calculate.

Enter your values

Each successful calculation counts toward this tool’s 8 free daily uses. Values stay in your browser.

Worked example

Example calculated from the starting values. Enter your own values and press Calculate to get your result.

Fill time41.7 hours

With the default inputs (pool volume = 50,000 L, flow rate = 20 L/min), the results are: fill time 41.7 hours.

Quick reference: pool volume vs result

Reference table based on the example values; it is not your calculation result.

Pool volume (L)Fill time
25,00020.8 hours
50,00041.7 hours
100,00083.3 hours
250,000208.3 hours
500,000416.7 hours
1,000,000833.3 hours

Frequently asked questions

What formula does this calculator use?

Fill time = vol ÷ flow ÷ 60. Variables: vol = pool volume in L, flow = flow rate in L/min.

What do I need to enter?

You need pool volume (L), flow rate (L/min). Results update as you type.

What is an example result?

With the default inputs (pool volume = 50,000 L, flow rate = 20 L/min), the results are: fill time 41.7 hours.

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