Estimating tools that show their work. Each calculator prints the formula it uses and the constants behind it, with sources, and ends in one action: send the result as a quote your customer can accept online. No monthly fee, ever.
Painting
Painting Estimate Calculator — Free painting estimate calculator for contractors. Enter rooms, coats and condition to get gallons, labor hours and a recommended price built from burdened labor, materials, overhead and margin.
Painting Production Rates — How many square feet a painter covers per hour by surface and crew speed, with a calculator that turns area and coats into painter-hours, crew-days, gallons and a labor price. Rates compiled from PDCA and PCA estimating guides.
Drywall
Drywall Calculator — Free drywall calculator for contractors: how many sheets of drywall for a room, plus joint compound, tape and screws, hang and finish hours by GA-214 level, and a price per square foot. Formula and constants shown.
Electrical
Electrical Flat Rate Pricing Calculator — Build electrical flat-rate prices from your tech's burdened wage, billable efficiency, overhead, margin and parts markup. A starter price book for outlets, switches, fans, breakers, EV chargers and panels with good-better-best tiers, and the formula behind every number.