Fill in the dimensions for your job - length, width, height, or whatever fields the calculator asks for. All measurements are in metres and millimetres unless stated. Want a head start? Try a Quick Start Project Kit - pre-built job templates that load common specs in one click.

Most calculators include a waste percentage field. The default is a recommended starting point - increase it for complex cuts or awkward layouts, reduce it for simple runs.

Your material quantities appear instantly. Results show packs, bags, or units needed, plus the total area or volume for reference.

Click Get UK Market Prices if the option appears. This loads current trade rates and gives you a cost estimate alongside your quantities. You can edit any of the prices before calculating if your own rates differ.

Click Save to Project to store these results. You can create a new project or add the line to an existing one. You can save one project for free, or upgrade to a Pro account to store as many as you need with cloud backup and access across all your devices.

Use the Print or Export CSV buttons to save your results. The print layout is clean and formatted for site use or handing to a client.