All Tools

Calculate cable sizes to BS7671 standards. Accounts for voltage drop, current capacity, and installation methods.

Calculate optimal downlight spacing and positioning for any room size.

Calculate volt drop along a cable run and check against BS 7671 limits. Suggests next cable size up if exceeded.

Calculate concrete volumes for slabs, footings, columns, and steps. Get mix ratios and material quantities.

Calculate steel beam sizes and weights for common structural steel sections.

Calculate staircase dimensions to UK Building Regulations Part K. Rise, going, pitch angle, and 2R+G compliance check.

Calculate scaffolding hire costs for independent, birdcage, and tower scaffolds. Erection, hire, and dismantle pricing.

Reference guide for domestic lintel sizes based on opening width and wall type. Not a substitute for structural engineering advice.

Reference lookup for timber joist and rafter sizes based on Approved Document A span tables. Covers C16 and C24 timber.

Calculate roof area, tiles needed, battens, felt, and ridge tiles for pitched roofs.

Calculate indicative U-values for walls, roofs, and floors. Check against Part L 2021 targets. Layer-by-layer breakdown with live updates.

Calculate spindle spacing for staircases and balustrades to UK Building Regulations.

Calculate staircase dimensions to UK Building Regulations Part K. Rise, going, pitch angle, and 2R+G compliance check.

Reference lookup for timber joist and rafter sizes based on Approved Document A span tables. Covers C16 and C24 timber.

Calculate spindle spacing for staircases and balustrades to UK Building Regulations.

Calculate stone volumes and costs with labour and markup. Toggle m³/ft³. Save and load jobs to continue later.

Calculate weights of common construction materials by volume or dimensions.

Calculate stone, bricks, blocks, and mortar needed for walls. Supports stone walling, standard UK brick and block sizes.

Calculate fence panels, posts, concrete, and gravel boards for any fence run.

Calculate paving slabs, sand, cement, and sub-base materials for patios and landscaping.

Calculate decking boards, joists, noggins, posts, and fixings needed. Full materials list ready for the merchant.

Calculate turf rolls, topsoil, and fertiliser needed for any garden. Supports rectangle, L-shape, and circular lawns with waste allowance.

Calculate plaster and render quantities for walls and ceilings. Multi-coat support.

Calculate plaster and render quantities for walls and ceilings. Multi-coat support.

Calculate weights of common construction materials by volume or dimensions.

Calculate indicative U-values for walls, roofs, and floors. Check against Part L 2021 targets. Layer-by-layer breakdown with live updates.

Calculate how much paint you need for any room. Accounts for doors, windows, coats, and tin sizes.

Calculate weights of common construction materials by volume or dimensions.

Calculate drainage pipe fall as ratio, percentage, and mm drop. Checks against Building Regulations Approved Document H.

Calculate tonnes of gravel, MOT, sand, topsoil, and aggregate needed. Built-in bulk densities, multi-area support, and bulk bag counts.

Calculate tiles, adhesive, and grout for floors and walls. Supports straight, brick bond, and diagonal layouts with wastage.

Reference guide for gas pipe diameters based on appliance demand and run length. For Gas Safe registered engineers only.

Calculate the BTU output needed to heat a room and get suggested radiator sizes. Accounts for insulation, windows, and room type.