Pool water volume calculator
Find the water volume of a round, rectangular, or oval pool from the sizes you type.
Result
Pool water volume calculator
- Units (required)
- Feet
- Shape (required)
- Rectangular
Volume
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Choose a shape and enter the sizes and the average depth.
Ballpark estimate, check before you buy or quote.
Pi is 355/113. One US gallon is 231 cubic inches. One cubic inch is 0.016387064 litres. Verify with your local code or a professional.
Estimate for planning only. This is not tax, legal, accounting or financial advice. Results depend on the figures you enter. Check all numbers, rates and rules with the official source or a qualified professional before relying on them.
How this works and common questions
About this tool
A rectangle is length times width times depth. A round pool uses the radius. An oval uses half the length and half the width. Depth is the average you type.
How it works
A rectangle is length times width times the average depth. A round pool is pi times the radius squared times the depth. An oval is pi times half the length times half the width times the depth. Gallons are cubic inches divided by 231.
Rules
Pi is 355/113. You type the average depth. Verify with your local code or a professional. Ballpark estimate, check before you buy or quote.
Questions
How is a rectangular pool measured?
Length times width times the average depth you type.
How are round and oval pools measured?
A round pool uses pi times the radius squared times the depth. An oval uses pi times half the length times half the width times the depth. Pi is 355/113.
How are gallons found?
Cubic inches divided by 231. A 20 by 10 by 4 foot pool is 5,984.4 US gallons.
Do I need an account?
No. The tools work without one. You only need to sign in to save your work.
Is what I type saved?
No. Nothing is saved unless you sign in and choose Save. Otherwise it stays on the page.
Do you show ads or sell my information?
No. We show no ads and we do not sell your information.
Is this tax or legal advice?
No. Results are estimates for planning. Check rates and rules with the official source or a qualified professional.
Sign in to save this. Your entries stay on screen.
Estimate for planning only. This is not tax, legal, accounting or financial advice. Results depend on the figures you enter. Check all numbers, rates and rules with the official source or a qualified professional before relying on them.