Rebar Weight Chart & Calculator (Online & Free)

Have you ever wondered about the weight of steel reinforcement bars (rebars) used in construction? In this insightful blog post, we’ll dive into the fascinating world of rebar weight charts and calculators. Discover how these essential tools help engineers and contractors accurately estimate the weight of various rebar sizes, ensuring precise material management in construction projects. Get ready to expand your knowledge and streamline your workflow with this comprehensive guide to rebar weight calculations.

Table Of Contents

Rebar Weight Calculator

Rebar Weight Chart

MS HR round wire rodΦ5.5kg/m0.187
MS HR round wire rodΦ6.0kg/m0.222
MS HR round wire rodΦ6.5kg/m0.26
MS HR round wire rodΦ7.0kg/m0.3019
MS HR round wire rodΦ7.5kg/m0.3469
Steel Strand for Prestressed Concrete(1×2)10kg/km310
Steel Strand for Prestressed Concrete(1×2)12kg/km447
Steel Strand for Prestressed Concrete(1×3)10.8kg/km465
Steel Strand for Prestressed Concrete(1×3)12.9kg/km671
Steel Strand for Prestressed Concrete(1×7)Standard9.5kg/km432
Steel Strand for Prestressed Concrete(1×7)Standard11.1kg/km580
Steel Strand for Prestressed Concrete(1×7)Standard12.7kg/km774
Steel Strand for Prestressed Concrete(1×7)Standard15.2kg/km1101
Steel Strand for Prestressed Concrete(1×7)Drawing Type12.7kg/km890
Steel Strand for Prestressed Concrete(1×7)Drawing Type15.2kg/km1295
Indented wire5kg/km0.016


(1) Theoretical weight calculation formula of rebar: theoretical weight (kg/m) = 0.00617 × D² (where, D is the section diameter, unit: mm)
(2) The density is calculated as 7.85g/cm³;
(3) The theoretical weight of hot-rolled ribbed bars, cold-rolled ribbed bars, HRB335, HRB400, HRB500 and other deformed bars of different classifications is the same.
(4) The theoretical weight calculated by the formula is different from the actual weight, and the error is generally about 0.2% ~ 0.7%, which can only be used as a reference for estimation.

Weight of Reinforcement With Common Specifications

(weight per meter)

For example:

  • Φ6=0.222Kg
  • Φ8=0.395Kg
  • Φ10=0.617Kg
  • Φ12=0.888Kg
  • Φ14=1.21Kg
  • Φ16=1.58Kg
  • Φ18=2Kg
  • Φ20=2.47Kg
  • Φ22=3Kg
  • Φ25=3.86Kg
  • Φ28=4.83Kg
  • Φ32=6.31Kg
  • Φ36=7.99Kg
  • Φ40=9.87Kg

Specification of Rebar

The specifications of rebar are typically required to be listed in import and export trade contracts.

Usually, the rebar specifications should include the standard grade, nominal diameter, nominal weight, specified length, and allowable differences of the above indicators.

The standard nominal diameters for rebar are 6, 8, 10, 12, 16, 20, 25, 32, 40, and 50mm.

The supplied length of rebar can be either fixed length or multiple lengths.

The range of fixed length for rebar exported from China is 6-12m, while that of rebar exported from Japan is 3.5-10m. If there is no requirement specified in the contract for domestic rebar, its length is usually 9m or 12m.

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Founder of MachineMFG

As the founder of MachineMFG, I have dedicated over a decade of my career to the metalworking industry. My extensive experience has allowed me to become an expert in the fields of sheet metal fabrication, machining, mechanical engineering, and machine tools for metals. I am constantly thinking, reading, and writing about these subjects, constantly striving to stay at the forefront of my field. Let my knowledge and expertise be an asset to your business.

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