Surveying & Geometry calculators

The geometry underneath most site measurements is simple; the errors come from mixing up horizontal distance with slope distance, or plan area with surface area. These tools show which one they are using.

• Area Calculator Calculate the area of a rectangle, triangle, circle or trapezoid, with results in metric and imperial units.
• Slope & Gradient Calculator Convert between percentage grade, ratio, angle and elevation difference for a slope.

Related categories

• Concrete Volume, slabs, footings and bag counts for concrete work, with editable density and wastage.
• Road & Asphalt Asphalt tonnage, granular base, tack coat and prime coat, with density under your control.
• Earthwork Excavation, backfill and trench volumes, including swell and compaction shrinkage.