Free Trade Calculators
🌐 Built in 12 Languages
All calculators on this page are available in English, Spanish, Hindi, Chinese (Simplified), Japanese, Arabic, Russian, French, German, Portuguese, Indonesian and Samoan — switch anytime from the language selector. Properly translated, not machine-generated as an afterthought. Built for the real mix of languages you’ll find on a job site or running an international team.
A collection of free calculators and tools for trade professionals — no signup required. Use them straight in your browser, or download the Android or Windows app for offline use on site.
📐 New: Free Online Site Planner
Draw your site boundary, place structures, and add measurements right in your browser — free to use, download your plan when you’re done.
🛁 New: Free Online Bathroom Planner
Plan toilet, vanity, shower and bath layouts in 2D or 3D, mark plumbing and electrical rough-in points, and pick from a full range of linings and colours.
Site Concrete Calculator
Works out exactly how much concrete you need for slabs, footings, post holes/columns, and steps. Set your mix ratio and premix bag size once, and get bags needed per pour, or a single cubic-metre figure to read out to the ready-mix truck company — with a wastage buffer built in.
Tiling Calculator
Everything you need before you start a tiling job: tile area and quantity, grout, adhesive, and spacer sizing — each with its own coverage rate and pack size, plus one wastage buffer that applies across all four so you know exactly what to order.
Painting Calculator
A full paint job estimate in one place — not just litres. Walls, ceiling and primer, plus trim, doors and window frames, with coverage rate and coats for each. Add your labour rate and it totals materials cost and labour hours together, with GST if you need it.
Brick & Block Calculator
Brick Block Calculator — Free to use.
Stay in the Loop
New calculators added regularly — get an email when a new free tool goes live.
