Free Tool
James Hardie Siding Calculator
Enter your wall area and HardiePlank profile — get the planks, squares, and corner trim for your project.
Don't know your wall area? Calculate one wall:
ft²
ft²
ea
ft
Siding Estimate
HardiePlank pieces (12 ft)
Squares to order (incl. waste)
Coverage per plank
Corner trim (12 ft)
Stocked at our Milwaukie, Portland and Vancouver WA yards — with delivery across Oregon & SW Washington. Pricing is free and there’s no obligation.
Based on 12-ft HardiePlank with a 1¼" headlap (exposure = plank width − 1¼"). Add HardieTrim for corners, windows, and bands; use Hardie-approved fasteners and a weather-resistive barrier. Our team confirms exact quantities and color availability at quote time.