# How Long to Fill a Pool Calculator

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Published on: September 5, 2023
Created by Calculator Services Team / Fact-checked by Monjurul Kader

Pool Fill Time Calculator

# Pool Fill Time Calculator

How long does it take to fill a pool?

Adjust sliders to calculate pool fill time.

20000
350

The average garden hose delivers around nine gallons per minute.

The amount of time it takes to fill a pool varies widely based on several factors. These include the volume of the pool, the capacity of the water source, and the diameter of the hose used to transfer the water. For instance, filling up a pool with a garden hose will take considerably longer than using a larger diameter hose or a dedicated water truck. The time required to fill a 50,000-liter pool, a 14’x42′ pool, a 12 by 30 pool, a 10ft pool, a 15,000-gallon pool, or a 3,300-gallon pool will vary based on these factors.

Calculating the time needed to fill different pool sizes, including 10ft, 12 by 30, 14×42, 3,300 gallons, 15,000 gallons, and 50,000 liters, becomes much more manageable using this calculator. Simply input the pool size in gallons or liters and the water flow rate in gallons per minute (GPM), and the calculator will give you an estimate of the time it will take to fill the pool.

To get a more accurate estimation of how long it will take to fill your pool, we invite you to read the detailed article below and use our pool fill time calculator.

# How Long to Fill a Pool Calculator

Planning to have a pool party or just a relaxing swim in your backyard pool? Knowing how long it will take to fill your pool is crucial for your plans. This is where the ‘how long to fill a pool calculator’ comes in handy.

## The Need for a Pool Fill Time Calculator

Filling a pool is not as simple as turning on a hose and waiting for it to fill. It requires a bit of planning and calculation. You might be wondering why it’s necessary to estimate the pool fill time. Well, it’s all about planning. If you know how long it will take to fill your pool, you can plan your activities accordingly. Moreover, it will also help you to manage your water bills, as filling a large pool can consume a significant amount of water.

## Factors Affecting Pool Fill Time

Various factors can affect the pool fill time. Let’s discuss them one by one.

### Volume of the Pool

The most obvious factor is the volume of your pool. A larger pool will take more time to fill compared to a smaller one. It is usually measured in gallons or liters.

### Capacity of the Water Source

The capacity of your water source, typically measured in gallons per minute (GPM), is another vital factor. A hose with a higher GPM will fill your pool faster than one with a lower GPM.

### Diameter of the Hose

The diameter of the hose also plays a role in determining the fill time. A hose with a larger diameter will allow more water to flow through it, thus filling the pool faster.

### Water Pressure

Water pressure can also affect the fill time. Higher water pressure will fill the pool faster than lower water pressure.

## How to Measure Your Pool Volume

Before using the ‘how long to fill a pool calculator,’ you need to know the volume of your pool. Pool volume depends on its shape and size. Here are some common pool shapes and how to calculate their volumes:

### Rectangular Pools

For rectangular pools, you can use the formula: Length x Width x Depth x 7.5. For example, for a pool with a length of 20 feet, a width of 10 feet, and a depth of 5 feet, the volume would be 20 x 10 x 5 x 7.5 = 7500 gallons.

### Circular Pools

For circular pools, you can use the formula: 3.14 x Radius x Radius x Depth x 7.5. For example, for a pool with a radius of 10 feet and a depth of 5 feet, the volume would be 3.14 x 10 x 10 x 5 x 7.5 = 11775 gallons.

### Oval Pools

For oval pools, you can use the formula: 3.14 x Length x Width x Depth x 5.9. For example, for a pool with a length of 20 feet, a width of 10 feet, and a depth of 5 feet, the volume would be 3.14 x 20 x 10 x 5 x 5.9 = 17658 gallons.

## Understanding Water Flow Rate

Water flow rate, measured in gallons per minute (GPM), is the amount of water that flows through your hose in one minute. It is another crucial factor for the ‘how long to fill a pool calculator.’ You can usually find the GPM of your hose mentioned on its packaging or the manufacturer’s website.

## Using the Pool Fill Time Calculator

Now that you know the volume of your pool and the water flow rate of your hose let’s see how to use the ‘how long to fill a pool calculator.’ You just need to enter the pool volume in gallons or liters and the water flow rate in GPM. The calculator will then give you an estimate of the time it will take to fill your pool. For example, if your pool volume is 10,000 gallons and your hose has a water flow rate of 350 GPM, it will take approximately 28.57 minutes to fill your pool.

## Tips for Filling Your Pool Faster

Filling your pool faster is not just about having a hose with a higher GPM. There are other ways to reduce the fill time. Here are some tips:

### Increase Water Flow Rate

You can use a hose with a higher GPM or use multiple hoses simultaneously to increase the water flow rate.

### Use a Dedicated Water Truck

If you are filling a large pool, it might be more efficient to use a dedicated water truck instead of a garden hose.

## Common Mistakes to Avoid

Here are some common mistakes that people often make when filling their pools:

### Underestimating Pool Volume

People often underestimate the volume of their pool, which results in a longer fill time than expected. It is crucial to measure your pool volume accurately.

### Overestimating Water Flow Rate

Overestimating the water flow rate of your hose can also lead to miscalculations. Make sure to check the GPM of your hose accurately.

### Not Considering Water Pressure

Not considering the water pressure can also lead to miscalculations. Make sure to take into account the water pressure in your area.

## Summary

In this article, we discussed the importance of estimating the time it takes to fill a pool and the factors that affect this time. We also provided a step-by-step guide on how to use the ‘how long to fill a pool calculator’ and some tips on how to fill your pool faster. Lastly, we discussed common mistakes to avoid when filling your pool and provided some references and additional resources for further reading.