Pool Volume
Calculate the water volume and fill cost of a swimming pool.
About Pool Volume
A rectangular pool holds its length times width times depth in cubic feet. Each cubic foot holds about 7.48 gallons, and the fill price follows from the water rate. Knowing the volume guides chemical dosing, pump sizing and the true cost of filling or topping up the pool.
Formula
Pool Volume
Gallons = length x width x depth x 7.48
- 7.48
- Gallons in a cubic foot of water
Worked example
With the default values below, Pool Volume returns Pool Volume of 20,196. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Pool lengthminimum 0 ft
- 30 ft
- Pool widthminimum 0 ft
- 15 ft
- Average depthminimum 0 ft
- 6 ft
- Water price per 1000 galminimum 0
- 4
Results
- Pool Volume
- 20,196 gal
- Volume
- 2,700 cu ft
- Estimated Fill Cost
- $80.78
- Approx. Cubic Meters
- 76.5 m³
Step by step
- 1Values used
- 2Pool Volume
- 3Pool Volume= 20,196 gal
- 4Volume= 2,700 cu ft
- 5Estimated Fill Cost= 80.78
- 6Approx. Cubic Meters= 76.5 m³
Assumptions and limits
- The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How is Pool Volume calculated?
Gallons = length x width x depth x 7.48 A rectangular pool holds its length times width times depth in cubic feet. Each cubic foot holds about 7.48 gallons, and the fill price follows from the water rate.
Why does Pool Volume matter?
Knowing the volume guides chemical dosing, pump sizing and the true cost of filling or topping up the pool.
What values do I need to enter?
This calculator takes 4 inputs: Pool length, Pool width, Average depth, Water price per 1000 gal. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.