How long does it take to fill up a pool? – Simple formula or with Calculator

Knowing, “How long does it take to fill up a pool” is good. Will it fill too quickly if you run the hose overnight? The answer I can provide is based on the experience I’ve had owning pools at several properties over the years.

How long does it take to fill up a pool

You’re probably ready to start swimming if you’re reading this. In order to achieve this, you must fill your pool with water as soon as possible. You may have a few questions in mind at this point, such as:

  • Is it possible to fill a large pool quickly?
  • What is the best way to fill up my swimming pool with Water?
  • What is the best way to fill your swimming pool with a garden hose?
  • How can I fill my pool for the least amount of money?
  • What is the cost of filling up a pool with Water?

Let’s get a bit more specific now that you know the approximate time. This post answers all those questions and more. You can find information on everything from how to fill your swimming pool to the average cost and availability of water delivery services.

How long does it take to fill up a pool? With calculator

The pool calculator shows the amount of water needed to fill pools of various sizes and depths. This is valuable information to help you estimate the cost of Water and the time it takes to grab a cold drink and swim from an empty pool. Try this tool if you don’t know the number of gallons in the pool.

More complex pool shapes require multiple calculations and their addition. Capacity calculations include surface area and volume calculations for pools or spas. This article explains how to calculate the size and capacity of your planned pool. Calculating pool area in square feet is the first step in determining information, including pool gallons, maximum capacity, and other important pool-related information.

Geometric Formula

The use of geometric formulas is a simple method for calculating the size of a swimming pool. Here are the basic formulas and calculations:

A=Area H= Height r= Radius L=Length 

W=Width d=Diameter Pi=3.14 constant

Area of a square or rectangle: A = L x W

The Area of a right triangle: A = (L x W)/2

Area of a circle: A = Pi x r x r

Calculating Volume

The volume of a cube can be calculated by including the depth and surface area of the pool. The pool must be divided into different areas according to the depth for correct calculations.

Constant Depth Pools: Square or Rectangular

Length x width x depth x 7.5 = volume (in gallons)

The product of length and width indicates the surface area of the pool. Multiply this by the depth to get the volume in cubic feet. There are 7.5 gallons in each cubic foot, so multiply the pool’s cubic feet by 7.5 to get the volume of the pool expressed in gallons.

Variable Depth Pools: Square and Rectangular

Length x width x average depth x 7.5 = volume (in gallons)

The product of length and width indicates the surface area of the pool. Multiply this by the average depth to get a cubic foot volume. There are 7.5 gallons in each cubic foot, so multiply the pool’s cubic feet by 7.5 to get the volume of the pool (represented in gallons).

Measure the pool length, width, and average depth, and round each measurement to the nearest foot, or 1-foot percent. One inch is equal to 0.0833 feet. Therefore, multiply the inch of the measurement by 0.0833 to get the appropriate percentage of a leg.

Example: 25 ft, 9 in. = 25 ft + (9 in. x 0.0833)

= 25 + 0.75

= 25.75 ft

If the shallow end is 3 feet, the deep end is 9 feet, and the pool floor is assumed to have a gentle and uniform slope, the average depth is 6 feet.

Average depth = (shallow edge depth + deep edge depth) / 2

Average depth = (3 + 9) / 2 = 6 feet.

If most of the pool is only 3 or 4 feet and a small area suddenly drops to 10 feet, the average depth will be different. You may want to treat the pool as two parts in such cases. Measure the shallow part’s length, width, and average depth, then do the same for the deep part. Calculate the volume of the shallow part and add this to the calculated volume of the deep part.

Use the actual water depth for the calculation, not the vessel depth. For example, the jacuzzi shown in Figure 2 is 4 feet deep, but the Water is only filled to about 3 feet. Using 4 feet in this calculation is 33 percent more than the actual amount of Water. This could mean a serious mistake, for example, adding a chemical applied based on the amount of water involved. When complete, you may want to know the potential volume. Then, of course, use actual depth (or average depth) measurements. In the example, it was 4 feet.

Length x width x average depth x 7.5 = volume (in gallons)

25.75 ft x 10 ft x 6 ft x 7.5 = 11,587.5 gallons

For a circular pool:

Water capacity = pool diameter x pool diameter x average pool depth in feet x 5.9

For an oval pool:

Water volume capacity = length of longest distance x length of the shortest distance x average pool depth x 5.9.

Example: If you have a circular pool with a diameter of 24 feet and an average depth of 5 feet, the pool’s water volume is 24 x 24 x 5 x 5.9 = 16,992 gallons.

Parts Per Million (ppm)

One of the most important calculations is parts per million (ppm). The amount of solids and liquids in Water is measured in parts per million, such as three parts of chlorine in one-millionth of Water, or 3 ppm.

This list shows standard terms and their equivalents to help:

  • Square foot (sq. ft.) = 12 inch wide x 12 inch long
  • Cubic foot (cu. ft.) = 12 inch wide x 12 inch long x 12 inch high
  • Cubic yard (cu. yd.) = 36-inch wide x 36-inch long x 36 inch high.
  • One cubic foot of Water contains 7.48 gallons
  • One cubic foot of water weighs 62.4 pounds.
  • One gallon of water weighs 8.33 pounds.
  • One millionth (ppm) is equivalent to 8.3 pounds of chemicals per million gallons of water.

However, if you pour 1 gallon of chlorine into 1 million gallons of water, it will not be 1 ppm. This is because the densities of the two liquids are not the same. This is clear because a gallon of water weighs 8.3 pounds, while a gallon of chlorine weighs 10 pounds (15 percent solution). Chlorine is a thicker liquid. There is more water than the same amount of water.

Pro Tip: If your home uses water while filling your pool, the filling process can be slow. Do not use water to avoid water pressure drop. This will increase the reload time.

How long does it take to fill up a pool? With Simple formula:

If you use a garden hose, filling your pool can take several hours. This will depend on the amount of Water your hose can deliver per minute.

It takes approximately 8-9 hours to fill a 5000-gallon pool with a standard size 1/2 inch garden hose. Multiply the number of gallons the pool holds by .0018 to calculate the time you need. The amount of Water a standard hose can deliver per minute is approximately 9 gallons or 540 gallons per hour.

The Effects of Water Pressure on Filling Speed

The speed of the water supplied to the pool depends on the water pressure. High water pressure can mean faster water supply time than lower water pressure.

The time required to fill a swimming pool depends primarily on the water pressure and volume of the swimming pool. It’s important to know how many gallons per hour your faucet produces and how much water your pool holds.

Find out what your hose’s water pressure is

You can easily determine the water pressure from the hose using the simple method below.

Let’s say you have a 5-gallon bucket. Use a hose to fill the swimming pool and start filling the bucket with water. It’s good to use a stopwatch to fill the 5-gallon bucket.

The number of seconds it takes to fill up 1 gallon of Water is Y. To illustrate:

Y = No. of seconds to fill up a 5-gallon Jug /5

GPH = (60/Y) x 60

Where 60/Y = gallons per minute

It took 50 seconds to fill a 5-gallon jug using this formula. 50/5 = 10, so it takes 10 seconds to fill a 1-gallon test.

In this case, the GPH would be (60/10) x 60 = 6 x 60 = 360. The water hose provides 360 Gallons of water per hour.

Assuming your pool capacity is 20,000 gallons, filling your pool would take 20,000/360 or 55.55 hours.

The hose size is also an essential factor in determining how long it will take to fill the pool. This time can be reduced by increasing the size of the hose. It affects the speed of the water, but this way, it fills more Water. In general, the time it takes to fill the entire pool depends on the size of the hose, the pressure of the water, and the pool’s capacity.

Is it possible to fill a large pool quickly?

The quickest way to fill a large pool is to use a water delivery service or a city fire hydrant. Please note that special permission is required from the local fire department to fill the pool with a city hydrant, and rules vary from state to state.

What is the best way to fill your swimming pool with a garden hose?

Using garden hoses and city tap water is the easiest and cheapest way to fill your pool. That we will guide you through the process:

  • Connect a sturdy garden hose to the water faucet closest to the pool.
  • Use a hose long enough to reach the pool comfortably.
  • Drop the open end of the hose into the pool
  • and turn on the Water
  • Leave the Water on for at least 24 hours before checking the water level.
  • Continue filling the pool until the water level is in the middle of the skimmer opening.
  • For a 15,000-gallon pool, this will take approximately 48 hours.
  • drain the Water
  • Add pool chemicals
  • Turn on the filter pump system

What is the cost of filling up a pool with Water?

Fill your pool up with city water and a garden hose to save money.

If you want to fill a big pool quickly, use a water delivery service. A quick comparison of the costs of filling a swimming pool is provided for your convenience:

Garden Hose: $80 – $150

Well Water: $50-$100

Water is free, but this covers the cost of running the excellent pump and water softener.

Pool Water Delivery Service: $500 – $1000

Final outline

Finally, I can conclude that pools are widely used around the world for a variety of purposes. The pool is also used to host multiple swimming competitions at the Olympic Games. Pools come in various shapes and sizes, depending on the purpose of the pool type you ultimately choose.

Personally, I’ve always used my hose to fill the pool. It can take a day or more and will usually triple your monthly water bill, but I think this is the most convenient and inexpensive way to do it.

Pools are also costly and need to be properly maintained regularly. Most pools are used to hold pool parties. It takes an average of 8-9 hours to fill the pool. There is more than one way to fill a pool with a fire hydrant, but pool water service is the most preferred.

Once you have filled the pool, please let us know in the comments below what type of hose you used, the size of the pool, and how long it took to fill it. I would like to hear how it went and if your calculations were done exactly as planned. Thanks!

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