Pool volume calculator

Find volume for a rectangular pool with a floor sloping uniformly from one end to the other.

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Pool volume calculator processes your input in this browser. Inputs and results are excluded from analytics. Recent tools save tool names, visit counts and last-visit times. Saved tools store only their names. Draft saving is optional and stays on this device; delete saved text with the draft controls. Loading text from a URL is optional and contacts that server; its URL and your IP address are visible to the server. An optional “Use in” action keeps a handoff in this tab. The next tool removes it on arrival and ignores it if more than a minute has passed.

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Internal length

Internal width

More inputs and assumptions

Shallow-end water depth

Deep-end water depth

Answer

…

Find volume for a rectangular pool with a floor sloping uniformly from one end to the other.

More results

Precision and calculation record

Decimal places in numeric results and text downloads

Rounding changes displayed numbers, not the calculation. Text, fractions, matrices and CSV schedules keep their own formatting. Automatic keeps up to 12 significant digits, with money shown to cents where applicable.

Step-by-step calculation

Inputs are substituted below. Each line evaluates the next operation; intermediate values are displayed to 12 significant digits while the calculation uses full precision.

Saved scenario

Save the current answer, then change an input to compare. This clears when you leave.

Formula and assumptions

Volume = length × width × (shallow depth + deep depth)/2. Dimensions share one unit. Steps, ledges, curved sides and nonlinear floor profiles require separate volume adjustments.

Automatic precision shows numbers to 12 significant digits. Thousands separators such as 1,000 are accepted; use a dot for decimals.

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Updated 2026-09-26

Using Pool volume calculator

Find volume for a rectangular pool with a floor sloping uniformly from one end to the other.

Volume = length × width × (shallow depth + deep depth)/2. Dimensions share one unit. Steps, ledges, curved sides and nonlinear floor profiles require separate volume adjustments.

Next: Volume calculator

A worked example

Example inputs: internal length = 10, internal width = 4, shallow-end water depth = 1, deep-end water depth = 2. Rectangular pool volume = 60.

Before you use the result

Volume = length × width × (shallow depth + deep depth)/2. Dimensions share one unit. Steps, ledges, curved sides and nonlinear floor profiles require separate volume adjustments.

Example results for internal length

These examples use Internal width: 4; Shallow-end water depth: 1; Deep-end water depth: 2. They are reference calculations, not recommended settings.

Internal length	Rectangular pool volume
5	30
10	60
20	120

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