The weight of rebar can be easily calculated by using this standard formula mentioned below: W= (D2/162.28)* L Where ‘D’ and ‘L’ are the diameter and the length of the rebar respectively. Take the value of diameter in terms of millimeter and length in terms of meters. You will get the results in kilograms (Kg).

A linear foot of #2 or 1/4″ diameter rebar weighs 0.167 lbs., #3 or 3/8” weighs 0.376 lbs., and #4 or 1/2″ rebar weighs 0.688 lbs. Multiplying the weight per foot of a specific diameter identifies the weight of the length. So, an 8-foot piece of #4 rebar will weigh 5.504 pounds, and a 20-foot length 13.76 pounds.