Calculate surface area for common 3D shapes including cubes, rectangular prisms, cylinders, cones, spheres, and square pyramids. Convert surface area units, add waste, estimate coating coverage, material units, and project cost.
Shape selection:
The calculator uses the selected 3D shape and measurements to estimate total surface area, lateral surface area, and base area.
Surface type:
Total surface area includes all faces. Lateral surface area includes the side area. Open top removes the top face when applicable.
Unit conversion:
The calculator converts the result into square feet, square yards, square meters, square inches, and square centimeters.
Project estimate:
The calculator adds waste, coverage units, material cost, labor cost, and total estimated cost.
A surface area calculator helps estimate paint, coating, wrapping, insulation, sheeting, or covering needs for boxes, tanks, pipes, containers, spheres, cones, pyramids, and other 3D objects.
It can help calculate total surface area, lateral surface area, base area, material quantity, waste, material cost, labor cost, and estimated project cost.
Your result shows estimated surface area, surface area with waste, lateral surface area, base area, square yards, square meters, square inches, material units, material cost, labor cost, and estimated total cost.
Select the 3D shape, enter the needed dimensions, and choose whether you need total surface area, lateral surface area, base area, or open top surface area.
Total surface area is the area of all outside faces or curved surfaces of a 3D object.
Lateral surface area is the side area of a 3D object, usually excluding the top and bottom bases.
Many projects use 5% to 15% extra for waste, overlap, overspray, seams, texture, cuts, and ordering buffer.
It is exact for clean geometric inputs, but real project estimates can vary by shape irregularities, rounded edges, texture, openings, overlap, waste, and measurement method.