About DIY Calculator UK

Our Mission

DIY Calculator UK was created with a simple goal: to help UK homeowners and DIY enthusiasts calculate material quantities accurately, saving money and reducing waste. Every year, millions of pounds are wasted on excess building materials, and countless projects are delayed by under-ordering. Our free calculators solve both problems.

Why We Built This

As DIY enthusiasts ourselves, we were frustrated by the lack of UK-specific calculation tools online. Most calculators use American material sizes, imperial measurements and US terminology. Our tools are built from the ground up for the UK market, using standard UK material specifications:

• Standard UK brick size: 215 x 102.5 x 65mm
• Standard UK wallpaper roll: 10.05m x 0.53m
• Standard UK fence panel: 1.83m (6ft) wide
• UK Building Regulations references (Part L, Part A)
• Metric measurements throughout
• UK supplier references (B&Q, Wickes, Screwfix, Jewson, Travis Perkins)
• Prices in pounds sterling

Our Methodology

Every calculator on this site uses industry-standard formulas combined with real-world data from UK manufacturers and suppliers. Our coverage rates, densities and material specifications are sourced from manufacturer data sheets and corroborated against trade resources. Each calculator includes a sensible waste allowance, typically 5-10%, to account for cutting, breakage and on-site adjustments.

We regularly review and update our calculators to reflect current UK Building Regulations, material prices and supplier availability. All content is written in British English and references UK-specific standards and practices.

What We Offer

Our suite of 10 free calculators covers the most common UK DIY and building projects:

• Paint Calculator — Litres and tins needed with UK brand coverage rates
• Wallpaper Calculator — Rolls needed with pattern repeat allowances
• Paving Calculator — Slabs, sand and sub-base for patios
• Gravel Calculator — Tonnes and bulk bags for paths and driveways
• Concrete Calculator — Volume, bags or separate mix materials
• Plastering Calculator — Bags and cost for all plaster types
• Decking Calculator — Boards, joists and fixings
• Fencing Calculator — Panels, posts and postcrete
• Brick Calculator — Bricks and mortar for walls
• Insulation Calculator — Rolls, boards and U-value guidance

Important Disclaimer

All calculations provided by DIY Calculator UK are estimates based on standard material specifications and industry formulas. They are intended as planning tools and should not be relied upon as the sole basis for material purchasing decisions. Actual quantities may vary due to site-specific conditions, material variations and working practices.

For structural work including foundations, load-bearing walls and retaining structures, always consult a qualified structural engineer. For projects requiring Building Regulations approval, contact your local authority Building Control department before starting work.

We are not responsible for any losses or damages arising from the use of our calculators. Always verify quantities with your supplier and purchase a small additional quantity to account for unforeseen waste.

Contact Us

We welcome feedback, suggestions for new calculators and corrections to our data. Visit our contact page to get in touch.