Chimney Weight Calculator

Last updated: 27 Mar 2025 | Author: Brij | Review By: Irshad

Share on :

Enter the total chimney size, material and wall thickness into the Chimney Weight Calculator. The calculator will evaluate the Chimney Weight.

Chimney Height:

Chimney Width:

Chimney Depth:

Material:

Wall Thickness:

Weight Estimation

Material Volume:

Total Weight:

Chimney Material Density Reference

Material	Density	Typical Use	Notes
Common Brick	120-125 lbs/ft³ (1,920-2,000 kg/m³)	Traditional masonry chimneys	Most common chimney material
Concrete Block	135-150 lbs/ft³ (2,160-2,400 kg/m³)	Modern chimneys, industrial	Heavier but more uniform than brick
Natural Stone	140-160 lbs/ft³ (2,240-2,560 kg/m³)	Decorative chimneys	Varies by stone type (granite, limestone, etc.)
Clay Flue Liner	115-125 lbs/ft³ (1,840-2,000 kg/m³)	Interior flue lining	Smooth interior improves draft
Stainless Steel Liner	8-12 lbs/linear foot (12-18 kg/m)	Retrofits, gas appliances	Lightweight but only for interior
Cast-in-Place Concrete	140-150 lbs/ft³ (2,240-2,400 kg/m³)	High-efficiency chimneys	Monolithic construction
Pumice Blocks	65-75 lbs/ft³ (1,040-1,200 kg/m³)	Prefab chimney systems	Lightweight insulating material
Fireclay	130-140 lbs/ft³ (2,080-2,240 kg/m³)	High-temperature applications	Specialized refractory material
Calcium Silicate	15-25 lbs/ft³ (240-400 kg/m³)	Insulated chimney systems	Extremely lightweight

Note: Densities are approximate and may vary by manufacturer and specific composition. Metal liners are measured by linear foot/meter rather than volume.

When building or evaluating a chimney structure, one crucial factor is knowing its weight. Whether you're planning the foundation, checking structural limits, or transporting chimney components, calculating the chimney weight can help you make informed decisions.

📐 What You Need to Know

To calculate the weight of a chimney, you typically need:

Outer dimensions (Height, Outer Width, Outer Depth)
Inner dimensions (Inner Width, Inner Depth)
Material density (e.g., brick, concrete)

This calculator assumes the chimney is a hollow rectangular prism (a box-like structure), and the weight is calculated by subtracting the inner volume from the outer volume and multiplying it by the density.

Chimney Weight Formula

1. Outer Volume of the Chimney

$\text{Outer Volume} = H \times W_o \times D_o$

Where:

$H$ = Height of the chimney
$W_o$ = Outer width
$D_o$ = Outer depth

2. Inner Volume (Hollow Part)

$\text{Inner Volume} = H \times W_i \times D_i$

Where:

$W_i$ = Inner width
$D_i$ = Inner depth

3. Net Chimney Volume (Material Volume)

$\text{Net Volume} = \text{Outer Volume} - \text{Inner Volume}$

4. Chimney Weight

$\text{Weight} = \text{Net Volume} \times \text{Material Density}$

Example Calculation

Let’s say we have the following dimensions:

Height $H=10 ft$
Outer Width $W_o = 2 ft$
Outer Depth $D_o = 2 ft$
Inner Width $W_i = 1ft$
Inner Depth $D_i = 1 ft$
Material Density = $\text{lb/ft}^3 =120lb/ft3$ (for brick)

Step 1: Outer Volume

$\text{Outer Volume} = 10 \times 2 \times 2 = 40 \, \text{ft}^3$

Step 2: Inner Volume

$\text{Inner Volume} = 10 \times 1 \times 1 = 10 \, \text{ft}^3$

Step 3: Net Volume

$\text{Net Volume} = 40 - 10 = 30 \, \text{ft}^3$

Step 4: Chimney Weight

$\text{Weight} = 30 \times 120 = 3600 \, \text{lbs}$

Final Result

So, the estimated weight of the chimney is 3600 lbs.

Conclusion

A chimney’s weight is crucial for proper structural support and transport. This Chimney Weight Calculator is a quick and easy tool to help homeowners, architects, and engineers estimate the load their chimney will apply. Try it now to simplify your project planning!

Check out 1 similar Chimney Weight Calculator :

Chimney Weight Calculator

Help Improve This Calculator

Your suggestions help us make better tools for everyone.