Trade-Oriented
Our calculations follow manufacturer guidance and industry standards, with built-in waste allowances.
Free trade tools
Builder Depot Calculators
Our free construction calculators help you work out the material quantities you need for your project, helping to avoid ordering in excess.
Results in Minutes
Fill in the calculator’s fields for instant results. No maths needed!
Order Direct
Match products and accessories from our trade catalogue, ready to add to your basket and ship across the UK.
Our Calculators
Select a tool below to get started. Each calculator gives a clear material breakdown and links straight to matching products on our website.
Live
Brick & Block Calculator
Find out the number of bricks and blocks you’ll need for walls and extensions.
Open Calculator
Live
BTU Calculator
Work out which radiator size and type will heat your room efficiently.
Open Calculator
Live
Roof & Tile Calculator
Calculate the amount of tiles or slates required to cover your roof.
Open Calculator
New
Decking Calculator
Work out how many decking boards you need to cover your outdoor space.
Open Calculator
Coming Soon
Loft Insulation Calculator
Estimate how much insulation you need to keep your home warm and energy efficient.
Available Soon
Coming Soon
Concrete & Cement Calculator
Work out how much concrete, cement or aggregate you’ll need for slabs, footings and foundations.
Available Soon
Coming Soon
Tile Calculator
Calculate how many wall or floor tiles you’ll need for your kitchen, bathroom or renovation project.
Available SoonHow It Works
Three simple steps from project plan to materials list:
1
Pick Your Calculator
2
Enter Your Dimensions
3
Get Your Materials List
Why Choose Builder Depot
When you're ready to order, we've got you covered with the same trade service that's served London for over two decades.
Nationwide Delivery
We ship products via our fleet of transport vehicles, or directly from the supplier. We also offer free delivery in selected areas on orders over £500 inc VAT.
Trade Accounts
We have cash and credit accounts for sole traders to large contractors.
Open from 6am
Get to site early. We open at 6am or earlier across our five London branches.
Expert Support
Our knowledgeable customer service team is on hand by phone or email for advice.
Ready to Start Your Project?
Once you've worked out your quantities, head to our online store to add materials straight to your basket. Got questions? Our trade team is on hand to help by phone or email.