See the related link below to Wikipedia which will give you the formula.
The two, Reynold's number and velocity, really measure quite different things.
Turbulent flow occurs above a certain Reynold's number; laminar flow occurs below a certain Reynold's number. The exact value of the Reynold's number required for flow to become turbulent varies, depending on the specific situation.
Laminar flow can be defined by the help of Reynold's number that can be determined by conducting experiments. A Reynold number <=2000 indicates that the flow is laminar.
Reynold's number
Debbie Reynolds Dog
Reynold Braybrooke died in 1405.
Reynold Harina is the inventor of the flourescent light.
Reynold Braybrooke was born in 1356.
Reynold Ginier was born in 1981.
Reynold Kraft was born in 1895.
Reynold's News was created in 1850.
Reynold Pympe was born in 1371.