Structural Calculators

Structural calculators for drywall, framing, and fencing. Pick a tool below.

Drywall Calculator

Calculate how many drywall boards you need for walls, and optionally the ceiling.

Calculate how many posts and panels you need for a fence, from its total perimeter.

Add up the square footage of multiple rooms or areas: rectangles, circles, and triangles.

Calculate board feet from lumber thickness, width, length, and quantity.

Calculate roofing squares from your house footprint and roof pitch, including waste factor.

Calculate how many packages of fiberglass batt insulation you need for a given R-value.

Calculate step count, riser, and stringer length for a straight staircase from its total rise.