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.
