Building & DIY Calculators
Free calculators for brickwork, mortar, concrete, paving and other common building projects. Use them for planning and early estimates, then confirm quantities against the actual project and supplier guidance.
🧱 Brick Calculator
Estimate the number of bricks needed for a wall.
🪣 Sand & Cement Calculator
Estimate sand, cement and finished mortar quantities.
🏛️ Lime Mortar Calculator
Estimate lime and sand quantities for brick or block mortar.
📐 Bricks per m² Calculator
Work out bricks required per square metre.
🧱 Brick Quantity Calculator
Calculate total brick quantities for a project.
🧱 Brick Wall Calculator
Estimate bricks and mortar for a wall.
🪣 Mortar Calculator
Estimate mortar quantities for brickwork.
🔄 Unit Converter
Convert common building measurements.
🏗️ Concrete Calculator
Calculate concrete volume and allow for waste.
🪨 Gravel Calculator
Estimate gravel volume, tonnes and bulk bags.
🧱 Patio Slab Calculator
Calculate paving slabs required for a patio.
🏠 Render Calculator
Estimate render material quantities.
📏 Floor Screed Calculator
Calculate screed volume and waste allowance.
Using the results
Calculator results are planning estimates. Wall openings, bond pattern, brick orientation, mortar joints, cuts, breakages and site conditions can change the quantity required. Add a sensible waste allowance and check the final order with your brick or mortar supplier.
Identify your brick first
If you are repairing an existing wall, use the brick photo identification tool and then compare the likely catalogue matches before calculating your order.