DIY & Home Improvement Calculators

Choose a live Get Your Project Right tool below.

• Paint Calculator — Estimate litres for walls and ceilings with practical UK tin buying recommendations.
• Flooring Calculator — Work out pack counts for laminate, LVT, and real wood with sensible cutting waste.
• Underlay Calculator — Calculate how much flooring underlay you need, including waste allowance, roll or pack coverage and practical buying quantities.
• Carpet Calculator — Calculate the carpet cut length and area you need based on your room size and carpet roll width, including estimated offcut and optional cost.
• Self-Levelling Compound Calculator — Calculate how much self-levelling or smoothing compound you need based on floor area, application depth and manufacturer-stated product coverage.
• Screed Calculator — Estimate screed volume, litres and bag quantities from floor area, planned depth and product yield.
• Tile Calculator — Work out wall and floor tile counts, box quantities, and practical cutting waste allowances.
• Grout Calculator — Calculate how much tile grout you need using tiled area, tile size, grout joint dimensions and manufacturer-stated consumption.
• Tile Adhesive Calculator — Calculate wall or floor tile adhesive bags and tubs based on manufacturer coverage or consumption.
• Plaster Calculator — Calculate bags of skim plaster for walls, ceilings or whole rooms with coverage & thickness.
• Decking Calculator — Calculate how many decking boards you need for a new deck. Enter your deck dimensions, board size, spacing and stock length to get a practical buying estimate.
• Fencing Calculator — Calculate UK fence panels, posts, gravel boards and post-mix from your boundary length and chosen panel size.
• Fence & Shed Paint Calculator — Estimate paint, stain or timber treatment for fence panels and shed walls using product coverage, coats and allowance.
• Patio & Paving Calculator — Calculate paving slabs, waste allowance, sub-base and bedding quantities for a rectangular patio or paved area.
• Gravel & Aggregate Calculator — Calculate how much gravel, decorative stone or aggregate you need from your area, depth and material type.
• Driveway Gravel Calculator — Estimate driveway surface gravel in cubic metres, tonnes and supplier bulk bags from area and depth.
• Turf Calculator — Calculate how many turf rolls you need from your lawn area, roll size and chosen waste allowance.
• Topsoil Calculator — Calculate how much topsoil you need in cubic metres, litres, tonnes and bags from your area and chosen depth.
• Shed Base Calculator — Calculate concrete, paving slabs and sub-base quantities for a rectangular garden shed base.
• Wallpaper Calculator — Work out how many rolls of wallpaper you need for a whole room or feature wall, taking into account roll dimensions, pattern repeat and extra allowance.
• Skirting & Scotia Calculator — Calculate how many skirting boards or lengths of Scotia/beading you need from your room perimeter, door openings, waste allowance and trim length.
• Plasterboard Calculator — Calculate plasterboard sheets for walls, ceilings or whole rooms with board sizes, layers and waste.
• Coving Calculator — Calculate total coving run length, full lengths needed, waste allowance, and packs to buy.
• Architrave Calculator — Calculate how much architrave you need for door openings or runs, with stock lengths, packs, and waste.
• Paving Mortar Calculator — Estimate paving bedding mortar, sharp sand and cement quantities from area, depth and mix ratio.
• Concrete Calculator — Estimate concrete volume in cubic metres and litres, with ready-mix and packaged bag quantities.
• Brick & Block Calculator — Estimate brick or block quantities from wall area, openings, unit size, mortar joint and waste allowance.
• Blind Size Calculator — Estimate recess or face-fit blind order dimensions using measured opening size and chosen deductions or overlaps.
• Curtain Calculator — Estimate curtain width, fullness, panel dimensions and finished drop from your fitted pole or track.
• Curtain Pole & Bracket Calculator — Estimate curtain pole length and bracket count from window width, side overlap and maximum bracket spacing.
• Radiator BTU Calculator — Estimate an indicative radiator output target in watts and BTU/h from room dimensions, broad construction presets, glazing, exposed surfaces and ventilation.
• Waste Removal Bag Calculator — Estimate waste-removal bag quantities from an approximate waste volume, bag capacity and usable-fill allowance.
• Fixings & Fasteners Calculator — Estimate screws, plugs or repeated fixing quantities, spare allowance, pack counts and optional cost.
• Loft Insulation Calculator — Estimate loft insulation coverage and roll quantities using loft area, target depth and manufacturer-stated roll coverage.
• Solar Panel & Battery Calculator — Estimate roof panel capacity, annual solar generation, battery impact, export income and indicative electricity savings.
• Repointing Mortar Calculator — Estimate wet mortar volume and optional bag quantities for brickwork repointing from wall, brick and joint dimensions.
• Plan My Patio — Estimate paving slabs, sub-base, bedding mortar, sand, cement and edging from one patio plan.
• Boiler Size & Heating Requirement Calculator — Estimate a sensible UK boiler output class by separating space-heating demand from combi hot-water demand.