Construction Calculators

Roof Truss Calculator

Free online Roof Truss Calculator. Quickly calculate and get instant results.

Roofing Calculator

Free online Roofing Calculator. Quickly calculate and get instant results.

Round Pen Calculator

Round pen circumference, area, and approximate number of panels from diameter.

Sag Calculator

Estimate arc radius and arc length from span and midspan sag (circular arc approximation).

Sand Calculator

Free online Sand Calculator. Quickly calculate and get instant results.

Sealant Calculator

Calculate required sealant volume and cartridge count from joint dimensions and length.

Shiplap Calculator

Estimate shiplap needed (linear meters) from wall size, board face width, and waste %.

Siding Calculator

Estimate net siding area and boxes needed from wall size, openings, waste %, and box coverage.

Size to Weight Rectangular Cuboid Calculator

Free online Size to Weight Rectangular Cuboid Calculator. Quickly calculate and get instant results.

Snow Load Calculator

Free online Snow Load Calculator. Quickly calculate and get instant results.

Soil Calculator

Calculate soil volume for garden beds.

Sonotube Calculator

Calculate concrete volume needed for round sonotube footings by diameter, height, and quantity.

Spindle Spacing Calculator

Compute equal gap spacing between spindles along a run, including end gaps.

Spindle Speed Calculator

Calculate spindle RPM from desired surface speed (SFM) and cutter diameter.

Spiral Staircase Calculator

Free online Spiral Staircase Calculator. Quickly calculate and get instant results.

Square Meter Calculator

Calculate area in square meters from length and width.

Square Yard Calculator

Compute area in square yards from length and width in yards.

Square Yards Calculator

Calculate square yards from length and width in feet (includes ft² result).

Stair Carpet Calculator

Free online Stair Carpet Calculator. Quickly calculate and get instant results.

Staircase Calculator

Calculate staircase dimensions.

Stairs Calculator

Free online Stairs Calculator. Quickly calculate and get instant results.

Steel Plate Weight Calculator

Free online Steel Plate Weight Calculator. Quickly calculate and get instant results.

Steel Weight Calculator

Free online Steel Weight Calculator. Quickly calculate and get instant results.

Stone Calculator

Estimate stone volume and weight from area, depth, and material density.