Express Lumber& Plumbing Supply

Measure. Count. Send your list.

Siding calculator

Count siding packs from your wall area and the net coverage on your chosen product. Add the count and product details to your material list.

Call or text (718) 851-2100 for today's price. Text the yard · Request a quote

Your measurements

Add all wall areas using the same siding. Subtract openings once. Read net installed coverage per pack from your chosen product, including its required overlap. Do not use its full board face area.

Waste is extra material for cuts and offcuts. Enter your own percentage, including 0 if none is needed.

Your material count

Ready when you are.

Enter your measurements and waste allowance, then tap Calculate.

Your result will show what was counted and what needs confirmation.

A count to discuss with the yard. Availability and specification are confirmed when we quote.

Keep the job together

My list

Review & send list

Your list is empty. Calculate, then add your result.

Items stay in this browser. Review your measurements and add material details before sending. The quote page is the next step; nothing has been sent yet.

How this siding calculator works

Net area = wall area minus openings. Area with waste = net area × (100 + waste percentage) ÷ 100. Packs = area with waste ÷ net coverage per pack, rounded up once. This method also works for individual pieces if you enter net coverage per piece and name that unit in your note.

Check a worked example

Arithmetic only: 600 sq ft minus 60 sq ft leaves 540 sq ft. Adding 10% gives 594 sq ft. At an invented example coverage of 25 sq ft per pack, 594 ÷ 25 = 23.76, rounded up to 24 packs. This is not a product coverage rate.

Before you order

Use the product maker's net installed coverage for your chosen pack. Coverage and overlap are never assumed. This area estimate does not lay out cuts, joints or reusable offcuts. Trim, fasteners, flashing and weather barriers are separate. We order siding for you; the yard confirms the product and availability.

Call or text (718) 851-2100 for today's price.

More tools for your material list

For deck boards, joists and a full deck layout, use the existing deck calculator and planner.