Home & DIY calculators
Eighteen calculators for the materials and budgets behind common home projects, from a single painted room to a new roof.
Paint & Walls
Paint, wallpaper and drywall quantities for one room or a whole floor.
Flooring
Laminate, vinyl plank, tile and carpet, with waste and boxes to buy.
Outdoor & Yard
Concrete, mulch, gravel, fences, decks and pavers.
- Concrete CalculatorSlabs, footings and round columns in cubic yards or m³ and bags.
- Mulch, Soil & Gravel CalculatorVolume, bags or bulk loads, and approximate weight.
- Fence CalculatorPosts, rails, pickets or panels, and concrete per post.
- Deck CalculatorDeck boards, joists and screws, with the material cost.
- Paver CalculatorPavers for a patio or path, plus gravel base and bedding sand.
Roofing
Roof area from the footprint, shingle bundles and pitch.
Energy & Comfort
Air conditioner size, appliance running costs and solar payback.
Remodel Costs
Kitchen and bathroom budgets as low, typical and high ranges.
Plan a project in the order the work happens
Most projects follow the same order on site, and planning in that order avoids paying twice. Structural and outdoor work comes first, then anything inside the walls, then surfaces, and finishes last. A bathroom refit, for example, starts with plumbing and electrics, moves on to boards and tiling, and ends with paint and fittings.
- Measure everything once. Write down room lengths, widths and heights, the number of doors and windows, and outdoor areas. Many calculators here reuse the same measurements.
- Work out quantities before prices. Quantities depend only on size and product, so they are the part you can get right at home. Prices depend on where and when you buy.
- Add a waste allowance. Offcuts, breakage and pattern matching use more material than the bare area. Each calculator shows its allowance so you can adjust it.
- Collect real prices and quotes. Use the example prices only to sketch a budget, then replace them with prices from your local store and written quotes from licensed trades.
When to bring in a professional
Painting, flooring, mulching and laying pavers are realistic weekend jobs for many people. Roofing, electrical work, gas, structural changes and anything that needs a permit are not. Use the calculators to understand the scale of those jobs and to compare quotes, and leave the work itself to licensed, insured contractors.