Work out what you need
Home & DIY
Calculate quantities, understand the method and turn the result into a practical buying plan.
Calculators
Paint Calculator
Plan wall, ceiling and fence paint with measured areas, coats, product coverage and whole tins.
Use calculator →02Tile Calculator
Calculate tile area, pieces and packs from dimensions or an already measured area.
Use calculator →03Wallpaper Calculator
Plan full-height wallpaper strips, repeat matching and whole rolls.
Use calculator →04Flooring Calculator
Estimate floor area and packs including waste.
Use calculator →05Concrete Calculator
Calculate slab or cylinder volume and convert it into bags using the actual product yield.
Use calculator →06Room Measurements
Combine rectangular sections and measure floors, walls, openings and room volume.
Use calculator →07Moving Box Planner
Plan box sizes and packing tape from measured or estimated contents volume.
Use calculator →08Grout Calculator
Estimate grout from tile dimensions, joint width and installation area.
Use calculator →09Decking Board Calculator
Estimate board rows, lengths and purchasing quantities from a rectangular deck layout.
Use calculator →10Insulation Roll Calculator
Plan roll quantities by measured area or repeated bays, including layers and offcuts.
Use calculator →11Curtain Fabric Calculator
Calculate fabric widths and cut drops from pole width, fullness, hems and pattern repeat.
Use calculator →12Drywall Sheet Calculator
Compare net-area sheets with a conservative row layout for a wall.
Use calculator →Practical guides
Guide
How Much Paint Do I Need?
Measure the walls, subtract large openings, apply the tin’s coverage and number of coats, then round up to whole tins. Includes a worked example for a 5 × 4 m room.
Read guide →Guide
How to Measure a Room for Paint
A repeatable wall-measuring method for rooms with doors, windows and uneven sections.
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Paint Coverage Explained
Understand square metres per litre, coats, surface absorption and realistic allowances.
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Painting Tools Checklist
Plan the essential tools for preparation, protection, application and cleanup.
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How Much Extra Tile Should You Buy?
Work out the tiled area, apply one waste allowance to the total, and convert to whole boxes. A worked example shows why 10% and 15% can give the same box count.
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How to Calculate Tile Waste
Convert measured area into a transparent cutting and breakage allowance.
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Tile Sizes Explained
Nominal versus actual tile size, how grout joints change the number of tiles per square metre, and why box coverage is the figure to buy by.
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How Much Flooring Should You Buy?
Measure the floor, choose a waste allowance for the room shape and layout, keep a repair reserve, and convert the result into whole packs.
Read guide →Guide
Flooring Waste Allowance Guide
Choose an allowance that reflects room shape, board direction and cutting complexity.
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Flooring Underlay Guide
Understand area, compatibility, moisture protection and roll coverage before buying underlay.
Read guide →Guide
How to Measure for Wallpaper
Measure the room, check the roll size, work out the cut length for each strip and how many full strips a roll gives, then allow for the pattern repeat.
Read guide →Guide
Wallpaper Roll Sizes Explained
Understand width, length, pattern repeat and usable drops per roll.
Read guide →Guide
Concrete Volume and Bag Count Explained
Calculate cubic metres for a slab, add a justified allowance, and convert the volume into bags using the yield printed on the bag, with a worked example.
Read guide →Guide
Concrete Bag Buying Guide
Convert concrete volume into bags using the manufacturer's stated yield.
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How to Choose Interior Paint
Choose interior paint by surface, sheen and washability: what matt, eggshell and satin change, how to compare technical sheets, and how to test before buying.
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Moving House Checklist
A room-by-room plan for moving house: sort before packing, sequence the work, label for the destination and buy only the supplies the box count needs.
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How Many Moving Boxes Do I Need?
Estimate moving boxes from rooms and people, or from the volume of your belongings, then split the total into small, medium and large boxes by weight.
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How to Choose Moving Box Sizes
Match box size and construction to the weight, fragility and handling needs of each item group.
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Moving Supplies Checklist
Choose the essential packing materials after the box estimate is complete.
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Paint Sheen Guide: Matte, Eggshell or Satin?
Choose an interior paint sheen by room use, cleaning needs and surface condition.
Read guide →Guide
Do I Need Primer Before Painting?
When bare, new, repaired, stained or strongly contrasting surfaces need a primer or mist coat, and when a sound painted wall only needs cleaning.
Read guide →Guide
Moving Van Size and Loading Guide
Turn the box estimate into a safer loading plan without pretending volume is the only constraint.
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