What density does this calculator use?

It uses 2400 kg/m³, the standard density for normal-weight plain concrete per most engineering references. Reinforced concrete is typically 2400–2500 kg/m³; adjust results by about 4% if your project specifies 2500 kg/m³.

Does this support non-square (rectangular) cross-sections?

Yes. Enter different values for outer width and outer height to calculate any rectangular hollow section. For a square tube, enter the same value for both width and height.

What happens if the wall thickness is too large?

The calculator validates that the wall thickness is less than half of both the outer width and outer height. If the wall is too thick the inner void would vanish, and an error message is shown.

How is the hollow cross-section area computed?

Outer area = width × height. Inner void area = (width − 2×t) × (height − 2×t), where t is wall thickness. Net area = outer area − inner void area.

Can I use feet and inches for input?

Each dimension field has a unit selector supporting mm, cm, m, and ft. Mix units freely — the calculator converts everything to meters before computing.

How do I convert the result to tonnes?

Divide kilograms by 1000. The result panel shows tonnes directly alongside kg and lbs for convenience.

Concrete Tube Weight Calculator

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

Enter outer width, outer height, wall thickness, and length of a hollow concrete tube to instantly calculate its weight in kg, lbs, and tonnes.

Input Dimensions

Outer Width

Outer Height

For a square tube, enter the same value for width and height.

Wall Thickness

Uniform thickness applied to all four sides.

Length

Concrete density: 2400 kg/m³ (standard normal-weight concrete)

Results

Enter dimensions and click Calculate

Cross-Section Preview

Summary

Enter outer width, outer height, wall thickness, and length of a hollow concrete tube to instantly calculate its weight in kg, lbs, and tonnes.

How it works

Enter the outer width and outer height of the rectangular cross-section.
Enter the wall thickness (uniform on all four sides).
The inner void dimensions are calculated as outer dimension minus twice the wall thickness.
Net concrete area = outer area minus inner void area.
Volume = net area × length; Weight = volume × 2400 kg/m³.

Use cases

Estimating the weight of precast hollow concrete columns before transport.
Calculating dead load from hollow concrete beams in structural analysis.
Checking vehicle payload capacity for delivering hollow concrete sections.
Comparing weight savings between solid and hollow concrete cross-sections.
Quick quantity takeoff for hollow concrete piers and box culverts.
Educational verification of hollow section weight calculations.
Material cost estimation based on net concrete volume.
Crane lift planning for hollow precast concrete elements.

Frequently Asked Questions

Last updated: 2026-06-09 · Reviewed by Nham Vu