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Volumetric Flow through a Section: Volumetric flow rate Calculator

Volumetric Flow through a Section: Calculate volumetric flow rate from Area, Speed. Check the formula, input units and worked result on this page.

Enter your values

m²
Formula symbol: A. Required unit: m². Must be greater than zero.
m/s
Formula symbol: v. Required unit: m/s. Must be greater than zero.

Use a decimal point, without thousands separators.

This model uses positive magnitudes. Speed is the mean normal velocity at the section; area is perpendicular to flow. Velocity profiles and compressibility details are not solved.
Example result
Volumetric flow rate
0.0675 m³/s

The initial result uses the example values. Enter your own values and calculate again.

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How it works

Use volumetric flow through a section with the units stated beside the fields. This form solves for volumetric flow rate; enter the known quantities in Area, Speed.

Inputs and units
Volumetric Flow through a Section: Volumetric flow rate Calculator · Inputs and units
InputExample valueWhat to enter
Area0.03 m²Formula symbol: A. Required unit: m². Must be greater than zero.
Speed2.25 m/sFormula symbol: v. Required unit: m/s. Must be greater than zero.
Qᵥ = (1 × A × v)

Worked example

Show example inputs and results

This example is generated by the same calculation engine using the starting values in the form. Your own inputs produce your own result.

Area
0.03 m²
Speed
2.25 m/s

Complete example results

Volumetric flow rate
0.0675 m³/s

Reading the result

The result solves for volumetric flow rate from the entered quantities. Check the result unit and the formula conditions before using it.

Questions and answers

Can I use the example values for my own calculation?

The example values illustrate the calculation. Replace every input with your own information, especially dates, rates and the selected operation.

When can I use the volumetric flow rate result?

This model uses positive magnitudes. Speed is the mean normal velocity at the section; area is perpendicular to flow. Velocity profiles and compressibility details are not solved.

Why are some results rounded?

Results display up to 8 decimal places. Calculations use the unrounded values; very small values use scientific notation. JavaScript floating-point arithmetic can introduce tiny rounding differences.

Are my inputs sent to a server?

The calculator processes inputs in your browser. Its code does not send your values to a server.

Method sources: openstax.org

Methods & accuracy

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