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Fluid Velocity Calculator – Pipe Line Velocity Calculator

Online Fluid Velocity Calculator.

Fluid Velocity Formulas:

Imperial Units:

V = ( 0.409 * Q ) /  d2.

where:

V = velocity, ft/s.

Q = flow, gpm.

d = pipe inside diameter, in.

SI Units:

V = ( 354 * Q ) /  d2.

where:

V = velocity, m/s.

Q = flow, m3/h.

d = pipe inside diameter, mm.