Use these calculators to estimate material quantities, planning ranges, repair scope, and cost drivers before you buy materials, compare contractor quotes, or choose a repair path. They are not contractor bids, engineering reports, code approvals, or manufacturer instructions.
Calculator categories
Start with the category that matches the project. Each category page lists the specific calculators for that topic.
Foundation Calculators
Foundation repair, inspections, cracks, slabs, stem walls, basement walls, underpinning, piers, house lifting, waterproofing, and concrete leveling.
Crawl Space Calculators
Crawl-space repair, waterproofing, drainage, sump pumps, vapor barriers, encapsulation, dehumidifiers, mold, insulation, pier-and-beam repair, beams, joists, and sagging floors.
Sheathing Calculators
OSB, plywood, wall sheathing, roof sheathing, floor sheathing, gable ends, panel counts, openings, sheet size, and waste.
Popular calculators
Use these first for common repair, inspection, moisture, and material-estimating problems.
Foundation Repair Cost Calculator
Estimate foundation repair ranges for slabs, crawl spaces, pier-and-beam foundations, walls, water problems, settlement, access, and engineering.
Crawl Space Foundation Repair Cost Calculator
Estimate repair ranges for sagging floors, water problems, posts, piers, beams, joists, and crawl-space access issues.
Crawl Space Encapsulation Cost Calculator
Estimate vapor barrier, sealed encapsulation, drainage, insulation, cleanup, and dehumidifier cost ranges.
Foundation Inspection Cost Calculator
Estimate inspection ranges for contractor visits, crawl-space inspections, engineer reviews, reports, and home-sale decisions.
Sheathing Calculator
Estimate OSB or plywood sheathing sheets for walls, roofs, floors, gable ends, repair areas, openings, panel size, and waste.
Roof Sheathing Calculator
Estimate roof sheathing sheets from roof planes, footprint, pitch factor, roof type, replacement percentage, panel size, and waste.
How to use these calculators
Start with the calculator that matches the problem you can see. If the issue involves water, floor movement, mold smell, damaged framing, cracking, settlement, or a wall that has moved, treat the result as a planning range only.
The real cost or material quantity can change after hidden damage, water source, soil, framing, access, code requirements, manufacturer instructions, and repair scope are checked.