Purchase-ready quantities
Get boxes, bags, rolls, boards and containers — not just square metres or cubic feet.
20 free home project calculators · No sign-up
Plan the project.
Buy the right amount.
Turn room measurements into practical material quantities, purchase units and cost estimates — then keep everything together in My Project.
✓ Metric + Imperial✓ Material costs✓ Reusable measurements
QMy ProjectSaved locally
CURRENT SPACEMaster Bedroom4.2 × 3.8 × 2.7 m
Materials estimate$1,248
Use these measurements in
Paint
Tile
Flooring
Drywall / Plasterboard
AC
What are you working on?
View all 20 tools →Find tools by project type.
Paint & Finishing
2 toolsPaint, wallpaper and finishing quantities.
Floors & Walls
5 toolsTile, flooring, drywall, grout and trim.
Construction
5 toolsConcrete, blocks, roofing, siding and insulation.
Outdoor
6 toolsDecking, fencing, pavers, soil and landscaping.
Energy
2 toolsCooling capacity and electricity running costs.
Popular calculators
Start with the project in front of you.
Each calculator goes beyond raw arithmetic to estimate realistic purchase quantities, waste and optional cost.
Paint & Finishing
Paint Calculator
Estimate paint quantity, coats, waste and purchase sizes.
Floors & Walls
Tile Calculator
Calculate tiles, waste allowance, boxes and estimated cost.
Floors & Walls
Flooring Calculator
Estimate flooring area, packs, waste and project cost.
Floors & Walls
Drywall / Plasterboard Calculator
Estimate sheets and supporting materials for walls and ceilings.
Construction
Concrete Calculator
Estimate concrete volume, ready-mix quantities or bag counts.
Outdoor
Gravel Calculator
Calculate gravel volume, bags, bulk quantity, estimated weight and cost.
The PlanCalq differenceMeasure once.
Measure once.
Use it everywhere.
Save a room or project area once and reuse its dimensions across compatible calculators. Every saved estimate can feed your running project cost summary.
Q
Living RoomSaved measurements
5 × 4 × 2.7 mPaintFlooringBaseboard / SkirtingAC
Running materials estimate$2,410
Plan beyond the formula
Browse all guides →Guides for the decisions around the calculator.
Learn how waste, product coverage, budgeting and purchase-unit rounding affect a real project estimate.
Planning guide
Renovation budget planning
Build a practical renovation budget by separating scope, material quantities, purchase units, labour, contingency and project-specific costs.
8 min read · Read guide →Planning guideRenovation contingency allowance
Understand the difference between material waste and renovation contingency, what creates uncertainty, and how to build a realistic allowance into a project budget.
7 min read · Read guide →Planning guidePaint quantity planning
Learn how wall area, openings, coats, product coverage, surface condition and container size affect a practical paint purchase estimate.
7 min read · Read guide →Planning guideTile and flooring waste
Understand why tile and flooring projects need extra material, what increases waste, and how pack rounding differs from a waste allowance.
7 min read · Read guide →Costs stay connected
Add product prices and keep a running material estimate for each saved space.
Built for real projects
Metric and Imperial support, editable assumptions and explanations that do not expect trade knowledge.