PHYSICS / FLUID DYNAMICS

Fluid Continuity Speed Calculator

Calculate downstream speed for steady incompressible flow through changing area. See the governing equation, substituted values, result, assumptions, and interpretation in one guided workspace.

01 Calculated in this tab
02 Values stay in this browser tab
03 Use boundary

Use boundary

Calculation path

Calculate downstream speed for steady incompressible flow through changing area. The page evaluates the displayed equation from your supplied values and presents both symbolic and substituted KaTeX working so the arithmetic can be checked.

Calculation path

A1v1=A2v2

What you provide

Upstream area expressed in m^2, using the same scenario as the other inputs
Upstream speed expressed in m/s, using the same scenario as the other inputs
Downstream area expressed in m^2, using the same scenario as the other inputs

What you receive

Downstream speed in m/s from the stated equation
A symbolic formula plus substituted working with your values
Visible assumptions, field guidance, and an authoritative learning reference

Use boundary

Choose the maximum decimal places shown. This does not increase source accuracy.

Flow is steady and incompressible with no branch, leak, or storage between sections.

Use internally consistent units and retain extra precision when carrying the result into another calculation.

Reviewed reference factors

OpenStax University Physics

Fluid Continuity Speed Calculator

Calculation path

What you provide

What you receive

Choose the maximum decimal places shown. This does not increase source accuracy.

Reviewed reference factors

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