Construction Calculators
Estimate materials, coverage, and costs for construction and DIY projects.
Concrete CalculatorCalculate concrete bags and cubic yards for a slab. Compare 40, 50, 60 and 80 lb bags, add waste and check 10x10 or 12x12 slab examples. Paint CalculatorEstimate paint gallons for room walls and an optional ceiling. Adjust coats, door and window sizes, and product coverage. Includes a 12x12 room example. Square Footage CalculatorFree square footage calculator. Calculate the area of any room, house, or land in square feet, square meters, or square yards. Add multiple areas. No sign-up. Tile CalculatorCalculate tiles and whole boxes for floors, walls or backsplashes. Enter tile size, tiles per box and waste; estimate material cost with 12x24 examples.
Plan Your Projects Accurately
Our construction calculators help you estimate materials before you start — saving time, money, and trips to the hardware store. From concrete and paint to tiles and square footage, get instant, accurate estimates for any project size.
Measure first, then estimate materials
Start with the square footage calculator to check area. For a rectangular slab, the concrete calculator adds depth and an adjustable allowance to estimate cubic yards and bags. For walls, the paint calculator uses coat count and your product's coverage. These tools estimate quantities; project design and product instructions determine the specifications you should enter.
Estimate what to buy for your project
- Concrete bags for a 10x10 or 12x12 slab: compare bag sizes and ready-mix volume with the same allowance.
- Paint for a room with two coats: measure walls, subtract openings and optionally include the ceiling.
- 12x24 tiles and whole boxes: enter your tile dimensions, pack size and price for a floor or backsplash estimate.