What is the density of zinc used?

This calculator uses the standard zinc density of 7133 kg/m³ (7.133 g/cm³), which is the widely accepted value for commercially pure zinc at room temperature.

What does "across flats" mean?

Across flats (A/F) is the distance measured between two parallel flat sides of the hexagonal bar. It is the standard way to specify hex bar size, equivalent to the wrench size or key width.

How is the hexagonal cross-section area calculated?

For a regular hexagon with across-flats dimension A/F, the side length is s = (A/F) / √3. The area is then (3√3 / 2) × s², which simplifies to (√3 / 2) × (A/F)².

Can I use millimeters and meters together?

Yes. Select your preferred unit for across-flats (mm) and length (mm or m) separately. The calculator converts all values to meters before computing volume and weight.

Is this calculation accurate for alloys?

This tool uses pure zinc density. Zinc alloys (such as Zamak) have slightly different densities. For alloy bars, verify the alloy density and note that results may differ by a small percentage.

How do I convert the result to other weight units?

The result is shown in both kilograms (kg) and pounds (lb). To convert to tonnes, divide kg by 1000. To convert to grams, multiply kg by 1000.

Zinc Hexagon Bar Weight Calculator

Enter the across-flats size and length of a zinc hexagonal bar to instantly calculate its weight in kg and lb.

Bar Dimensions

Across Flats (A/F)

Distance between two parallel flat sides

Length

Quantity

Reference

Zinc density 7133 kg/m³

Cross-section formula (√3/2) × A/F²

Weight Result

Enter dimensions and press Calculate

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Summary

Enter the across-flats size and length of a zinc hexagonal bar to instantly calculate its weight in kg and lb.

How it works

Enter the across-flats (A/F) dimension of the hexagonal bar in millimeters.
Enter the length of the bar in millimeters or meters.
The calculator derives the side length from the across-flats value using s = A/F / √3.
It computes the hexagonal cross-sectional area as (3√3 / 2) × s².
The volume is calculated by multiplying area by length.
Weight is found by multiplying volume by zinc density (7133 kg/m³), and displayed in kg and lb.

Use cases

Estimating material cost for zinc hexagonal bar stock orders.
Structural load calculations for zinc hex bar components.
Workshop or fabrication planning where bar weight affects handling.
Comparing weights of different hex bar sizes before purchasing.
Quality control checks against nominal weight specifications.
Shipping weight estimation for hex bar consignments.

Frequently Asked Questions

Last updated: 2026-09-19 · Reviewed by Nham Vu