📐 Engineering

Stair Calculator: Rise, Run, Riser Height & Stringer Length

Instantly calculate stair rise, run, riser height, and stringer length. Enter floor-to-floor rise and max riser for accurate counts and code compliance.

Roof Pitch Calculator: Pitch, Angle in Degrees and Slope Percent

Instantly convert roof pitch (x:12) to angle in degrees and slope percent. Add span to compute rafter length, area multiplier, and roof area.

Concrete Calculator: Cubic Yards and Bags for Slabs, Footings and Posts

Estimate concrete volume in cubic yards, feet, or meters and calculate 40‑, 60‑, and 80‑lb bag counts for slabs, footings, and posts. Free and simple.

Area and Volume Calculator: Square Feet, Cubic Feet and Cubic Yards

Calculate square feet, cubic feet, and cubic yards for rectangles, circles, and cylinders. Enter dimensions in feet, inches, or meters and get instant results.