Free trade calculators
Quick material and cost calculators for the trades — no sign-up. Work out the numbers, then turn them into a professional estimate with a free BuilderBuddi account.
Concrete Calculator
Slab volume in m³, bags, and cost.
Open calculator →Paint Calculator
Litres, cans to buy, and cost.
Open calculator →Drywall Calculator
Boards (sheets) needed and cost.
Open calculator →Roofing Calculator
Roof area, squares, tiles, and cost.
Open calculator →More calculators coming — tiling, decking, plastering, fencing, and dozens more inside the app.
50+ trade calculators, quotes, and invoices in one app
BuilderBuddi runs your estimates and job admin from your phone — offline, no office required. Free to start.
Create your free account →