House Wrap Calculator
Estimate house-wrap rolls and purchased membrane coverage from building perimeter, wall height, opening deductions, overlap allowance and roll dimensions.
Default project preview
2 rolls
Gross wall area
1,620 ft²
Opening deductions
260 ft²
Order area
1,564 ft²
Coverage per roll
900 ft²
Calculator
Build the material order
Your order will appear here
Enter the project details and calculate a rounded material estimate.
Methodology
Transparent calculation
BuildMeter converts every input to a consistent internal unit, applies the selected allowance, and rounds products up to whole purchasable units.
Net wall area = perimeter × wall height − openings. Order area includes overlap and waste. Rolls = round up (order area ÷ roll area).
BuildMeter Guides
Understand the measurements and assumptions
Use these visible reference guides before changing project inputs or planning allowances.
FAQ
House Wrap Calculator questions
Should window and door openings be deducted?+
Yes for a closer area estimate, although flashing and wrapping into openings can use some of that material.
Does this calculate tape and flashing?+
No. Those quantities depend on seams, openings, penetrations and the selected weather-resistive barrier system.
Why is overlap included?+
Horizontal and vertical seams, corners and repair patches require more material than the net wall area.