Round steel bar weight calculation formulae

How to calculate weight of round steel bar/Solid bar?

Formulae for steel Tube/pipe weight calculation.

weight of steel Round bar=
D * D*0.00617 *L

If you do this calculation without considering  length then you get weight in    KG per meter.
then  multiply it by length of Bar.

L - length in Meters.
D - Diameter

round steel bar weight calculation formulaw

Detailed formulae

weight of steel Round bar=
 Diameter in mm * Diameter in mm * length of bar in Meters * 0.00617

Example of round steel bar weight calculation.

Calculate weight of a steel tube of following dimensions.?
Length              =  4 meter's.
Diameter          =  100mm

Applying above formulae we get.

100 * 100 * 4 * 0.00617    = 246.8 KG.