Know exactly what to buy before you start.
Free DIY material calculators. Enter your measurements and get the quantity, a shopping list and a cost estimate in your units and currency.
No calculator matches that yet. Try “floor”, “paint” or “garden”.
Flooring & tile
4 toolsFlooring Calculator
FreeBoxes of laminate, vinyl or hardwood for a room, with waste.
Tile Calculator
FreeNumber of floor or wall tiles, adhesive, grout and cost.
Carpet Calculator
FreeCarpet and underlay by the roll width, with the length to cut.
Grout Calculator
FreeGrout for any tile size, joint width and depth.
Paint & walls
3 toolsConcrete & masonry
3 toolsOutdoor & garden
5 toolsGravel & Mulch Calculator
FreeCubic yards, tonnes or bags of gravel or mulch.
Fence Calculator
FreePosts, panels and post concrete for a fence line.
Deck Board Calculator
FreeDeck boards, joists and screws for a rectangular deck.
Topsoil Calculator
FreeTopsoil for raised beds, borders and lawns.
Grass Seed & Turf Calculator
FreeSeed or turf rolls for a new lawn.
Roofing & building
4 toolsYour units, your currency
Switch between feet and metres, and US, UK, Canadian or Australian prices, on every tool.
A shopping list, not just a number
Each calculator lists the materials and extras you will need for the job.
19 free calculators
Download any estimate as a Word file or save it as a PDF to take to the store.
Latest DIY guides
Step-by-step answers to the questions people ask before a project: how much to buy, how to measure, and how much to allow for waste.
- How Many Fence Pickets Do I Need? (Per Foot, 100 ft and 30 m)With standard 5.5 in (140 mm) privacy pickets and no gap you need about 2.2 per foot, so a 100 ft fence takes about 219 pickets, or 230 with 5% waste.
- How Many Concrete Blocks Do I Need? (Per Square Foot and m²)Standard 8 x 16 in blocks work out at 1.125 per square foot, so a 100 sq ft wall needs about 113 blocks (119 with 5% waste). Metric 440 x 215 mm blocks need about 9.9 per m².
- How to Calculate Board Feet (Formula and Examples)Learn the board foot formula, how to price hardwood lumber, and the difference between nominal and actual sizes, with worked examples.
- How to Calculate Stairs: Rise, Run and Number of StepsCalculate the number of steps, riser height and tread depth for a staircase, with the common building-code limits and a worked example.
- How Much Grout Do I Need? Formula, Examples and Bag SizesWork out how much grout you need from tile size, joint width and depth, with worked imperial and metric examples and tips on waste.
- How Much Sod Do I Need? Rolls per Square Foot With WasteWork out how many sod rolls a lawn needs, with a 5% waste allowance and a worked 30×40 example.
Free DIY Material Estimating Cheat Sheet
Formulas and waste allowances for paint, tile, flooring, drywall, concrete, gravel, grout, shingles and lumber on one printable page. Enter your email and download it free.
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Plan your whole project budget in one sheet
The DIY Project Budget & Materials Planner (Excel) turns your calculator results into a shopping list and cost plan.