Underlayment Calculator

Calculate underlayment for floating floors.

Surface area measurement (length × width for rectangles).
sq ft
Horizontal measurement perpendicular to length.
feet
Linear measurement in the specified unit.
feet

Results

Coverage per Roll:
Value expressed as a rate (per unit).
-sq ft
Rolls Needed:
Calculated rolls needed based on your inputs.
-rolls
Seam Tape:
Calculated seam tape based on your inputs.
-rolls
Reference: NWFA Standards.