Home project calculators
Each tool on this page turns one measurement into an order quantity, and each one states the formula it applies before it prints a number.
Paint Calculator
Estimate finish paint from room dimensions, openings, coats, coverage, and waste.
Wall Area Calculator
Calculate net wall surface area after subtracting doors and windows.
Tile Calculator
Estimate tile boxes from floor area, tile coverage per box, and cutting waste.
Flooring Calculator
Estimate flooring packs with a layout-specific waste allowance.
Concrete Calculator
Estimate ready-mix volume for a slab, footing, or pad including waste.
Drywall Calculator
Estimate drywall sheets for walls and ceiling with a cutting allowance.
Wallpaper Calculator
Estimate wallpaper rolls from wall area, roll coverage, and pattern waste.
Grout Calculator
Estimate grout mass from tile joint dimensions and total joint length.
Mortar Calculator
Estimate mortar volume and premix bags from masonry volume, mortar share, and the manufacturer yield per bag.
Decking Calculator
Estimate decking boards or packs from deck area and board coverage.
Fence Calculator
Estimate fence panels and posts from run length and spacing.
Roofing Material Calculator
Estimate roofing coverage from footprint, pitch, and waste.
Insulation Calculator
Estimate insulation packs from surface area and pack coverage.
Gravel Calculator
Estimate gravel tonnes from area, depth, and bulk density.
Mulch Calculator
Estimate bags of mulch from bed area and target depth.
Garden Soil Calculator
Estimate soil volume for beds and planters.
Lumber Calculator
Estimate board feet and material cost from board dimensions and count.
Waste-Factor Calculator
Add a transparent waste allowance to any measured base quantity.
Metric-Imperial Converter
Convert common home-project lengths, areas, volumes, and weights.
Project Cost Calculator
Add two material lines and tax to make a quick project budget.
How to choose a calculator
Pick the calculator that matches the surface, volume, run, or budget line you measured. Every result page carries the formula, a worked example checked against published reference data, and the measurement steps behind it.
This is a planning result, not a supplier quote; sellers use different pack, bag, board, roll, and bundle conventions, so confirm the exact product label and selling unit before you order.