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`m = muD * (pi*D*L)/2`

Enter a value for all fields

The **Weight of Seawater in a Pipe **calculator computes the weight (mass) of seawater in a pipe based on the density of the seawater (saltwater), the diameter and length of the pipe.

**INSTRUCTIONS**: Choose units and enter the following:

- (
**D**) Diameter of Pipe - (
**L**) Length of Pipe - (
**μD**) Density of Seawater

**Weight of Seawater in a Pipe (M):** The calculator returns the mass in kilograms. However, this can be automatically converted to compatible units via the pull-down menu.

The Weight of Sea Water in a pipe is calculated using the dimensions of the pipe (length and diameter) and the of the density of sea water. The formula for the weight of seawater in a pipe is:

M = μD • π • (D/2)² • L

where:

- M is the mass (weight) of seawater in the pipe
- μD is the density of seawater
- D is the diameter of the pipe
- L is the length of the pipe

**IMPORTANT NOTE**: The above formula assumes that the pipe is full of seawater. A partially full pipe will have less water and weigh less. This calculation should be considered the maximum weight and does not include the weight of the pipe.

The mass is calculated based on the following equation:

Volume is calculated using the volume of a pipe equation. And the mean density of sea water is a vCalc constant equal to 1,025 kilograms per cubic meter.