Free calculators contractors actually use.
Accurate material calculators for construction, landscaping, plumbing, electrical, HVAC, roofing, and home improvement. Fast, mobile-friendly, built for the job site.
Browse by Category
Construction
Concrete, framing, foundation, and structural calculators for builders and contractors.
Electrical
Wire gauge, load, circuit breaker, and voltage drop calculators for electricians.
HVAC
BTU, duct sizing, airflow, and heat load calculators for HVAC technicians.
Home Improvement
Paint, flooring, drywall, tile, and general home improvement calculators.
Landscaping
Mulch, gravel, soil, and ground cover calculators for landscaping professionals and homeowners.
Plumbing
Pipe sizing, water flow, and fixture calculators for plumbers and DIY homeowners.
Roofing
Shingle, underlayment, ridge cap, and roofing material calculators for roofers.
Why NicheCalc?
Every calculator on NicheCalc is purpose-built for a specific trade. No generic math tools. Real formulas, real material costs, real results you can take to the supply store.