Free Contractor Calculators
Free online calculators for contractors — markup & margin, roofing materials, concrete slab, paint coverage, labor rate, deck cost, and shed cost. No account required.
Estimate job costs with clear inputs
Use the calculator directly in your browser with no account required. Enter the project measurements or business costs, review the calculated quantities, and carry the result into a professional estimate.
- Free to use without signing in
- Built for contractors and project planning
- Results designed to support—not replace—field verification