Smart Tools for Your Home
Global Calculators for Real Home Projects
Free, honest tools and guides for home, construction, renovation and DIY projects — metric first, imperial one tap away, no sign-up.
Metric-first, with published reference tables behind every formula
Why it matters
Your Home. Your Project. Your Numbers.
Every project follows the same path: plan, measure, calculate, understand, build. The guessing is optional.
01
Understand your measurements
Every project starts with the same question: how big is it, really? Our guides show you how to measure rooms, walls, beds and roofs the way trades do — so your numbers are right from the start.
02
Know your quantities
Bags, sheets, gallons, tiles — with sensible waste allowances built in. MyHouseLogic turns your measurements into a shopping list you can take to the store.
03
Plan with confidence
Plain-English assumptions and unit conversions mean you can plan, order and book the right help before you commit a weekend.
Project plans
What Are You Planning to Build?
Start with the project, not the tool. Each plan sequences the calculators and guides in the order the work actually happens — from measuring the site to ordering the materials.
The calculators
Thirty Calculators, One Honest Method
Every calculator is instant, free and built around real-world measurements — with its assumptions printed beside the answer and a Met/Imp toggle in the header.
Concrete
Concrete Slab & Footing
Cubic metres and yards, bag counts and rebar for patios, drives and footings.
Use the calculator
Painting
Paint & Primer Coverage
Gallons needed for walls and ceilings, with doors and windows deducted.
Use the calculator
Flooring
Tile Layout & Mortar
Tile count, thinset and grout for any tile size — with a live layout preview.
Use the calculator
Sub-base
Gravel & Aggregates
Volume, tonnes and bulk bags for driveways, paths and sub-bases.
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Garden
Mulch & Topsoil Bulk
Bags or bulk delivery for any bed shape — in litres, metres and yards.
Use the calculator
Roofing & Solar
Solar Panel Sizing
Panel count, system size and annual output from your usable roof area.
Use the calculator
Browse by category
Or Start From the Materials
Ten categories, each pairing its calculators with the guides that explain them.
Roofing & Solar
Roof materials, gutters, solar sizing and battery storage — the work at the top of the house.
Concrete & Building
Slabs, gravel, bricks, blocks, mortar, render and stairs — the structural core of the site.
Garden & Outdoor
Mulch, pavers, decks, fences, retaining walls and raised beds — the whole garden, quantified.
Pools & Water
Pool volumes, pond liners, pump flows and the litres behind every water feature.
Painting & Walls
Paint coverage, drywall sheets and wallpaper rolls — everything that makes walls beautiful.
Flooring
Tile layout, mortar, grout, waste and packs — plan floors that look right the first time.
Home Systems
Water heaters, insulation, pipes, rainwater and electrical load — the quiet systems behind the walls.
Garage & Workshop
Lighting levels, circuits and service load — the planning that makes a workshop work.
Kitchen & Bathroom
Wet-area tiling, splashbacks and moisture-rated finishes — covered today by the tile and paint tools.
Homes Around the World
Tatami rooms, Chinese apartment renovations, UK bathrooms, SA double brick and timber sizes worldwide.
Field guides
Practical Advice for Real Homes
Fifty field guides — from concrete curing to how Japanese rooms are counted in tatami mats — each written to answer a real question with real numbers, and paired with the calculator that does its arithmetic.
How Much Concrete Do I Need?
Volume, waste factors and the bags-versus-truck decision, explained in plain English.
How Much Paint Do I Need?
Coverage per gallon, coat counts, and the deductions for doors and windows.
How Much Tile Do I Need?
Square footage, pattern waste and the 10% rule that saves your project.
Drywall Sheet Sizes Explained
4×8 or 4×12? Thicknesses, weights and how to choose for your room.
How Much Mulch Do I Need?
Depth, bed area and the bulk-versus-bags maths for any garden border.
Timber & Lumber Sizes Around the World
A “2×4” is really 38 × 89 mm — the translation table for planning across countries.
How we work
Built on Practical Calculations
Behind every MyHouseLogic calculator is a practical calculation method based on established measurement practices and industry references — standards like ASTM, ANSI, TCNA and IRC are used where they genuinely apply.
Built on published tables
Every formula traces back to published industry reference tables — ASTM, ANSI, TCNA, IRC — and where practice differs by country, the page says so.
Every assumption in the open
Bag yields, coverage rates and waste factors are printed on the page next to the result — so you can adjust for your own project.
Plain English first
We write for homeowners, not engineers. The technical detail is there when you want it — but it never gets in the way.
Free, no sign-up
No accounts, no email walls, no dark patterns. The tools run in your browser and the numbers update as you type.
How the library grows
Bigger Only When Better
Thirty calculators and fifty guides are live today. The library grows one tool at a time, and only when the maths tests clean against worked examples and a guide exists to explain it — the project plans map out what each project still wants.