Fiber Cement Siding Calculator
Fiber cement planks needed for siding.
Enter your values
ⓘ Live results
Results
- Planks needed
- 379
- Coverage per plank
- 7 sq ft
- Nails needed (16 in o.c.)
- 3,420
Quick answer
Plank count is net wall area divided by the exposed coverage of each plank, plus waste for cuts.
planks = ceil(net area x (1+waste%) / exposed coverage per plank)
How to use the Fiber Cement Siding Calculator
- 1Measure perimeter, wall height and subtract openings.
- 2Enter the exposed reveal (lap) and plank length from the product spec.
- 3Add 10% waste for cuts around corners and openings.
Worked example
Using the values the calculator loads with:
Inputs
- Perimeter160 ft
- Average wall height16 ft
- Doors/windows area150 sq ft
- Exposed reveal7 in
- Plank length12 ft
- Waste allowance10 %
Results
- Planks needed379
- Coverage per plank7 sq ft
- Nails needed (16 in o.c.)3,420
Frequently asked questions
What exposure is typical?
6.5-7 inches of reveal is common for standard fiber cement lap siding.
Do I need special blades to cut it?
Yes, use a fiber-cement rated blade and cut outdoors with dust control.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.