Free elevation grade calculator. Enter rise and run to get slope ratio, percent grade, and angle of elevation in degrees or radians. Fast, accurate, and easy to use.

Free roof pitch calculator: enter rise and run to get slope ratio, pitch (X-in-12), degrees, % grade, and rafter length.

Free square footage calculator: enter length and width (ft/in/m) to get area in ft² and m². Add multiple rooms and switch units instantly.

Tank volume calculator for cylindrical, rectangular & oval (horizontal/vertical) tanks. Enter dimensions & fill % to get capacity in gallons, liters, m³.

Free sand calculator: enter area & depth to get volume (yd³/m³), tons, bags, and cost. Density presets (dry/damp), rectangles/circles, coverage; instant steps & PDF.

Free ramp calculator: enter rise and desired slope to get ramp length, run, angle, and grade. ADA presets (1:12, 1:20) & custom limits. Supports ft/m; instant steps & PDF.

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.