The NumberTrove library
Home & build
calculators.
Plan a home improvement project with practical estimates for materials, surface area, and quantities. These calculators help you turn dimensions into an order-ready starting point for concrete, landscaping, paint, flooring, tile, and roofing work.
Choose the right home & build calculator
Start with the calculator that matches the material you are buying. Measure the project in consistent units, add a realistic waste allowance, and confirm product coverage or bag yield with the supplier before ordering.
Every tool is free, browser-based, and includes its formula, assumptions, and related calculators. Use the links below to start with the result you need.
Concrete calculator
Estimate volume, waste, and bag count for a slab, footing, or path.
Home & buildConcrete bag calculator
Estimate how many premix bags your project will need.
Home & buildGravel calculator
Estimate gravel volume and purchase quantity for a project.
Home & buildMulch calculator
Find the cubic yards of mulch needed for a bed or landscape area.
Home & buildSoil calculator
Plan soil or compost quantities for raised beds and planting areas.
Home & buildPaint calculator
Estimate paintable area and the number of gallons to buy.
Home & buildFlooring calculator
Calculate floor area and add a practical cutting allowance.
Home & buildTile calculator
Estimate tile count with room for cuts and breakage.
Home & buildSquare footage calculator
Find the area of a rectangular room, wall, or surface.
Home & buildRoof pitch calculator
Calculate roof pitch, angle, and rise from run and ridge height.
Home & build