Elevation Grade Calculator helps you calculate grade, incline, angle, and slope percentage from rise and run for roads, trails, and land work.

Roof Pitch Calculator helps you find roof pitch, slope, angle, and rise-to-run values quickly for roofing, planning, and construction work.

Square Footage Calculator helps you measure room area, total square feet, and material cost quickly with accurate results.

Tank Volume Calculator helps you find tank capacity in gallons, liters, and cubic units with fast, accurate results.

Sand Calculator to estimate sand volume, weight, and cost for construction, landscaping, and sand pit projects.

Ramp Calculator to find slope, rise, run, gradient, and ramp length for accessibility and construction planning.

Calculate pipe volume from inner diameter and length. Get capacity in m³, liters, and US gallons (plus per-length). Supports mm/in and ft/m. Shows formula and steps; instant results & PDF.

Free gravel calculator: enter area & depth to get volume (yd³/m³), tons, bags, and cost. Supports rectangles, circles, driveways; density presets; instant steps & PDF.

Free wall framing calculator: enter wall length/height, stud spacing (16″/24″ o.c.) & openings to get studs, plates, headers, sheathing and cost. Metric/imperial with waste %, steps & PDF.