Free tools
Free tools & calculators, no sign-up
Small, genuinely useful tools for running and bidding work: an invoice generator plus formula-backed material calculators. Free to use, nothing to install, no account needed.
Free Invoice Generator
Build a clean, professional invoice in your browser. Add line items, tax and a currency, then print it or save it as a PDF. No login.
Open toolConcrete Calculator
Slabs and footings to cubic yards of ready-mix, plus how many bags if you're mixing on site.
Open toolSquare Footage Calculator
Length and width to total square footage, square yards and square metres, with an optional price per square foot.
Open toolGravel Calculator
Area and depth to cubic yards and tons for gravel, stone, sand or topsoil.
Open toolPaint Calculator
Room size and coats to gallons of paint, with deductions for doors and windows.
Open toolDrywall Calculator
Wall and ceiling area to 4×8 sheets, joint compound and screws, with a waste allowance.
Open toolRoofing Calculator
Footprint and roof pitch to actual roof area, roofing squares and shingle bundles.
Open toolStart running your business the easy way
Free forever for solo businesses. No credit card. Set up in about five minutes.