How Much Does It Cost to Fill a Pool?

By Elizabeth Michael

June 01, 2025

Swimming pools provide endless hours of fun and help keep you cool during the summer seasons, making them an ideal addition to any home. If your home has an empty inground pool or you're considering installing a pool, you may be wondering how much it will cost to fill your pool with water.

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Whether you use your own hose water, city water or a pool water delivery service, average prices can range from $40 to $2,000 (CAD 55 to CAD 2,766) to fill a 10,000- to 20,000-gallon pool, with a national average of $900 (CAD 1,245).

How Much Does It Cost to Fill My Swimming Pool With Water Through a Water Delivery Service?

If you're wondering how much it costs to fill your pool with water via a water delivery service, the average total cost for a 10,000- to 20,000-gallon pool is $300 to $2,000 (CAD 415 to CAD 2,766). Factors that may affect the overall cost of a pool water delivery service include the pool size, geographical location and labor costs.

How Much Does It Cost Per Gallon to Fill My Pool With Water Through a Water Delivery Service?

Most pool water delivery service companies charge per 1,000 gallons instead of an hourly rate. The average cost is $30 to $100 (CAD 42 to CAD 138) per 1,000 gallons. Here's a per-gallon breakdown for pool water:

  • 1,000 gallons: $30 to $100 (CAD 42 to CAD 138)

  • 5,000 gallons: $150 to $500 (CAD 208 to CAD 692)

  • 10,000 gallons: $300 to $1,000 (CAD 415 to CAD 1,384)

  • 15,000 gallons: $450 to $1,500 (CAD 623 to CAD 2,075)

  • 20,000 gallons: $600 to $2,000 (CAD 830 to CAD 2,767)

Pool Size: How Many Gallons of Water Are in My Pool?

Most standard outdoor, inground swimming pools hold between 15,000 and 30,000 gallons of water. However, your pool may hold less than 15,000, more than 30,000 or somewhere in between, depending on its size. Here's a simple formula to determine the gallons in a standard rectangular pool:

  • Step 1: Measure your pool's length and width.

  • Step 2: Measure the depth of your pool at both its shallowest point and its deepest point.

  • Step 3: Add the shallow and deep depths together and divide that number by 2 to calculate your pool's average depth.

  • Step 4: Multiply your pool's length, width and average depth to calculate its volume in cubic feet.

  • Step 5: Multiply the cubic feet total by 7.5 to convert the calculation into gallons. The final calculation should equal your pool's total gallons.

Example

Here's an example for a 10 x 20 pool that's 4 feet deep in the shallow end and 10 feet deep in the deep end:

(4 + 10) / 2 = 7

10 x 20 x 7 = 1,400

1,400 / 7.5 = 10,500

So, a pool of this size would need about 10,500 gallons.

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How Much Does Filling 1,000 Gallons of Pool Water Cost?

On average, 1,000 gallons of water costs between $4 and $10 (CAD 5.53 and CAD 14) when you fill up the pool with a garden hose and $30 to $100 (CAD 42 to CAD 138) through a pool water delivery service. It's important to note that these prices can vary significantly based on pool size, geographical location and delivery service labor costs.

How Much Does 10,000 Gallons of Pool Water Cost?

When using a pool water delivery service, 10,000 gallons of water costs approximately $300 to $1,000 (CAD 415 to CAD 1,384). If you're wondering how much it is to fill your pool with water via a garden hose, the average cost for 10,000 gallons is approximately $40 to $100 (CAD 55 to CAD 138). However, it's important to keep in mind that these costs can vary depending on factors such as your local water and sewer rates and specific delivery service pricing.

Is It Cheaper to Fill a Pool With a Hose or a Water Truck?

When filling a pool with water from your garden hose, the total cost should be based on the water and sewer rates set by your city. You may notice a higher water bill if you go this route, but it's also significantly cheaper than using a water truck service in most cases. Large pools typically require several truckloads of water, which can contribute to higher costs. On average, it can cost around $160 to $400 (CAD 221 to CAD 553) to fill a 40,000-gallon pool with your hose, while a water truck may charge between $1,200 and $4,000 (CAD 1,660 and CAD 5,534).

All CAD conversions are based on the exchange rate on the date of publication.

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