How to choose the right calculator
1
Use the closest project tool
Choose roofing, siding, deck, fence, stair, paving, excavation, or opening calculators when you need accessories and purchasing units beyond a simple area or volume.
2
Measure each plane or run
Roofs, walls, fences, and paved areas are more reliable when entered as separate measured sections instead of inferred from an entire building footprint.
3
Check design-sensitive outputs
Framing, stairs, ramps, drainage, roofing, and excavation involve safety and code requirements. Treat quantities as preliminary until project documents and qualified reviewers confirm them.