Chimney Block Calculator

Enter your chimney height and flue configuration to get a complete materials list — blocks, flue liners, mortar, cap, and rain caps — with estimated costs.

Chimney Height (ft)

Cleanout Doors

Waste Factor (%)

Pricing (edit to match local rates)

Chimney Block ($)

Flue Liner 8"x8" ($)

Flue Liner 8"x12" ($)

Mortar 80 lb Bag ($)

Chimney Cap ($)

Rain Cap ($)

Cleanout Door ($)

Total Courses

15 ft height

Chimney Blocks

incl. 5% waste

Total Material Cost

$367.00

Purchase Option	Quantity	Est. Cost
Chimney Blocks	25 blocks	$125.00
Flue Liners	8 liners	$96.00
Mortar (80 lb bags)	1 bags	$6.00
Chimney Cap	1 cap	$85.00
Rain Caps	1 caps	$35.00
Cleanout Doors	1 doors	$20.00

Chimney height code requirementsA masonry chimney must extend at least 3 feet above the point where it passes through the roof and at least 2 feet higher than any structure within 10 feet (IRC Section R1003.9). Verify your local code before building.

1 cleanout door includedCleanout doors are installed at the base of each flue for ash removal. A standard cast-iron cleanout door costs $15-$30 — the cost is included in the material total above.

This is a material estimate only. Actual block and liner counts may vary based on chimney design, offsets, and local building codes. Consult a mason or structural engineer for complex chimney builds.