Siding Calculator App — How Much Siding Do I Need?

Siding jobs have more accessories than any other trade. It's not just the siding itself — it's J-channel around every window and door, F-channel at the soffit, drip cap, H-molding where panels meet, starter strip, utility trim, mounting blocks, and flashing. Forget one item and you're making a trip back to the supplier.

SidingPro calculates all of it. Every wall, every window cutout, every accessory — from the house wrap underneath to the eave trough on top.

What SidingPro Calculates

• Siding — vinyl lap, wood lap, board and batten, and shake. Square footage with waste.
• J-channel — linear feet around all windows and doors.
• F-channel — at soffit transitions.
• Drip cap — above windows and doors.
• H-molding — where panels butt together.
• Soffit and fascia — calculated per section.
• Eave trough with downspouts — linear feet and downspout count.
• Mounting blocks — for light fixtures and outlets.
• House wrap, strapping, and nails — the stuff everyone forgets to quote.
• Trim lineals — corners, window trim, door trim.

Multi-Wall Support

Every house has different walls — different heights, different window counts, different gable ends. SidingPro lets you enter each wall separately with its own dimensions and openings, then combines everything into one material list with a PDF takeoff you can hand to the supplier.

Free and Pro Versions

SidingPro is free with the full calculator and PDF takeoff. SidingPro Plus adds quoting, invoicing, e-signature, and profit tracking for $99/year. Both work offline and on your phone.