What density is used for zinc?

The calculator uses the standard density of commercially pure zinc: 7.133 g/cm³ (7133 kg/m³). This is the widely accepted reference value for Zn.

Does this work for zinc alloys like Zamak?

This tool is calibrated for commercially pure zinc. Zinc alloys such as Zamak typically have lower densities (around 6.6–6.9 g/cm³), so results will be slightly higher than actual alloy weight. Use this as a conservative estimate for alloys.

What is the formula used?

Cross-sectional area = (outer width × outer height) − (inner width × inner height), where inner width = outer width − 2 × wall thickness, and inner height = outer height − 2 × wall thickness. Weight = area × length × 7.133 g/cm³, with all dimensions converted to centimeters.

What is the difference between RHS and SHS?

RHS (Rectangular Hollow Section) has unequal outer width and height. SHS (Square Hollow Section) has equal outer width and height. Both shapes are supported — just set the same value for width and height for a square tube.

Can I enter decimal values?

Yes. Decimal values are accepted for all dimension fields, for example 25.4 mm wall thickness or 3.175 m length.

Why does wall thickness matter for the result?

A hollow tube's weight depends on the area of material in its cross-section, not the outer size alone. A thicker wall means more zinc material and therefore more weight per unit length.

Zinc Tube Weight Calculator

Name: Zinc Tube Weight Calculator
Availability: InStock
Author: Nham Vu

Enter the outer dimensions, wall thickness, and length of a zinc hollow tube to instantly calculate its weight in kg and lb.

Tube Dimensions

Unit System

Outer Width

Outer Height

Wall Thickness

Length

Quantity

Weight Result

Enter dimensions and click Calculate

Summary

Enter the outer dimensions, wall thickness, and length of a zinc hollow tube to instantly calculate its weight in kg and lb.

How it works

Select a tube shape — square (equal sides) or rectangular.
Enter the outer width and outer height of the hollow section.
Enter the wall thickness (must be less than half of the smaller outer dimension).
Enter the tube length and an optional quantity.
The calculator finds the cross-sectional area of the tube wall: (outer width × outer height) − (inner width × inner height).
Weight = cross-sectional area × length × zinc density (7.133 g/cm³), shown instantly in kg, lb, g, and t.

Use cases

Estimate procurement weight and cost for zinc hollow tube stock.
Calculate shipping weight for zinc RHS or SHS sections.
Verify weight against engineering or fabrication drawings.
Compare different wall thicknesses to balance strength and weight.
Material planning for zinc-coated structural components.
Educational use in materials science and structural engineering courses.
Logistics and freight quoting for zinc tube orders.
Design trade-off analysis between section sizes and load requirements.

Frequently Asked Questions

Last updated: 2026-06-11 · Reviewed by Nham Vu