All our branches in England and Wales remain open as usual to ensure the nation’s tradespeople can keep working. Please always wear a face covering when visiting a branch. Read our COVID-19 update.

Conversion & Building Materials Calculator


Converting length, volume, weight or area measurements is tedious and frustrating when you’re hard at work on a job. Save time and money using our Conversion & Building Materials Calculator to estimate the amount of bricks, tiles or cement needed to finish the job.

Each conversion and materials calculator is packed full of useful tools. Our concrete calculator tool instantly tells you how much cement, sand, gravel and water you’ll need to fill an area, while our volume conversion calculator tool quickly and easily carries out tricky, time-consuming volume conversions from a choice of more than 70 measurement units.

No more wasting time and money on over or underestimated materials - our materials calculators do it for you!

Once you know exactly what you need for the job, visit your local branch to find the materials you need, or save time by ordering everything you require online.

Please note: Our builders’ calculators are for guidance only and we cannot accept liability for the given quantities.

Get your trade card and buy online & in-branch today!

There’s no need to wait for your trade card to turn up. Upload your proof of business, fill out your details, and we'll give you your trade card number then and there so you can buy online and in-branch straight away.