Rebar Weight Calculator

Calculate the weight of reinforcing steel bars (rebar) based on diameter and length.

Input Parameters

Calculation Results

Calculation Formula

Weight (kg) = π × (d²/4) × L × 0.00617

Where:
π = Pi (approximately 3.14159)
d = Diameter of rebar (mm)
L = Length of rebar (m)
0.00617 = Weight per cubic meter of steel (kg/m³)

Rebar Weight Calculator Calculator Usage Guide

Learn how to use the Rebar Weight Calculator and its working principles

How to Use the Calculator

  1. Enter the diameter of the rebar in millimeters (mm). Standard rebar diameters typically range from 6mm to 50mm.
  2. Enter the length of the rebar in meters (m). Ensure you measure the length from the bending point to the end for accurate calculations.
  3. Click the "Calculate" button to compute the weight of the rebar.
  4. The result will be displayed in kilograms (kg).

Working Principle

The calculator uses the formula for the volume of a cylinder (π × (d²/4) × L) and multiplies it by the density of steel (7850 kg/m³) to determine the weight of the rebar.

Applications

This calculator is useful for construction professionals, engineers, and DIY enthusiasts who need to estimate the weight of rebar for:

  • Transportation and storage planning
  • Structural load calculations
  • Material ordering and budgeting

Example

If you have a 12mm diameter rebar that is 3 meters long:

Weight = π × (12²/4) × 3 × 0.00617 ≈ 8.04 kg