About

Estimating the weight of metal stock is a critical step in logistics planning, structural load calculation, and cost estimation. Metal is sold by weight, but utilized by length. A mistake in tonnage calculation can lead to overloaded transport trucks or significant budget variances.

This calculator determines the theoretical mass of various metal profiles using standard industry densities. It supports common shapes like Round Bar (Rebar), Square Bar, and Flat Sheets, allowing traders and fabricators to instantly convert linear meters into kilograms or tons.

Formulas

Mass is calculated as Volume multiplied by Density (ρ).

m = V × ρ

For a Round Bar (Rebar), the volume is cylinder area times length:

m = π × (d2)² × L × ρ

For Flat Bar or Sheet:

m = Width × Thickness × L × ρ

Reference Data

Material	Density (kg/m³)	Common Use
Mild Steel	7,850	Construction Beams, Rebar
Stainless Steel (304)	7,900	Kitchenware, Medical
Aluminum (6061)	2,700	Aerospace, Window Frames
Copper	8,960	Wiring, Plumbing
Brass	8,730	Fittings, Instruments
Cast Iron	7,200	Pipes, Cookware
Titanium	4,500	High-performance parts

Frequently Asked Questions

No. The calculation is based on the theoretical nominal density of the base metal. Coatings like zinc (galvanization) add a small percentage to the weight (typically 3-5%), which should be added as a safety margin.

We use 7850 kg/m³, which is the standard engineering approximation for rolled steel. High-alloy steels may vary slightly, but this value is the industry standard for trading.

Currently, this tool supports solid profiles (Round bar, Square bar, Flat bar). For pipes, you would calculate the "Outer Cylinder" weight and subtract the "Inner Cylinder" weight (the hole).