TradeTrac · Free Tools
Contractor Calculators
Free online calculators for contractors — paint, tiles, concrete, wallpaper, decking, labour cost, VAT, profit margin, quotation and materials. Work out quantities, costs and margins before you quote. No login required.
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Each tool has its own page with a permanent link you can bookmark or share. Pick a calculator below to open it.
Paint Calculator
Free paint calculator for contractors. Work out wall and ceiling area, paint coverage per litre, number of coats and total paint required for any room.
Tile Calculator
Free tile calculator for contractors. Calculate the number of tiles needed for a floor or wall, including spacing and a wastage allowance.
Concrete Calculator
Free concrete calculator for contractors. Calculate concrete volume in cubic metres for slabs, footings and columns, plus bags of cement required.
Wallpaper Calculator
Free wallpaper calculator for contractors. Calculate the number of wallpaper rolls needed, including pattern repeat and waste.
Decking Calculator
Free decking calculator for contractors. Calculate the number of decking boards and linear metres needed for a deck area.
Labour Cost Calculator
Free labour cost calculator for contractors. Calculate labour cost from hours, crew size and hourly rate for any job.
VAT Calculator
Free VAT calculator for South African contractors. Add 15% VAT to a net amount or extract VAT from a gross price.
Profit Margin Calculator
Free profit margin calculator for contractors. Calculate selling price, gross margin and markup from your cost price and margin percentage.
Quotation Calculator
Free quotation calculator for contractors. Add labour, materials and margin to build a total quote price with VAT.
Materials Calculator
Free materials calculator for contractors. Calculate quantities and total cost for multiple materials on a single job.