About

Estimating material weight is a critical step in logistics planning and structural engineering. Shipping costs are weight-dependent, and structural loads must be calculated before fabrication. Using a generic "metal" calculator is dangerous because Aluminum 6061 (2.7 g/cm³) weighs nearly three times less than Steel (7.85 g/cm³).

This calculator replaces physical engineering handbooks. It combines geometric volume formulas for standard profiles (Round, Square, Flat, Hexagonal) with a specific density database of common industrial alloys. By calculating W = V × ρ, it provides the theoretical mass for procurement orders and load estimations.

Formulas

The weight calculation follows a two-step process: Area determination and Mass derivation.

1. Cross-Sectional Area (A):

{

Round: π ⋅ r²Square: a²Flat: w × tHex: 0.866 × s² (approx)

2. Total Mass (M):

M = A × Length × ρ

Where s is the distance across flats for hexagonal bars.

Reference Data

Material	Density (kg/m³)	Density (lb/in³)
Mild Steel	7850	0.2836
Stainless 304	7900	0.2854
Stainless 316	7980	0.2883
Aluminum 6061	2700	0.0975
Aluminum 7075	2810	0.1015
Copper	8960	0.3237
Brass (Yellow)	8470	0.3060
Titanium Gr 2	4510	0.1629

Frequently Asked Questions

These are "theoretical weights". Actual weight varies due to rolling tolerances (ASTM A6 standard allows for deviation), coating thickness (galvanization adds weight), and specific alloy composition variances.

Yes. The calculator uses the "Distance Across Flats" (the standard caliper measurement) rather than the side length to calculate the hexagonal area.

You can input millimeter (mm) dimensions for the profile and Meter (m) for length. The tool automatically handles unit harmonization before applying the density factor.

Stainless Steel contains alloying elements like Chromium and Nickel, which have higher atomic masses than the Iron they replace or supplement, slightly increasing the density.