Every ProjectCalc Pro calculator answers the same question: how much material do you need, in the units the store actually sells? Enter your measurements and each tool shows the quantity, the number of bags, boxes, or sheets to buy, and the formula behind the result, so you can check the math yourself. Our methods are explained in full on the How We Calculate page.
Square Footage Calculator
The starting point for almost every project. Measure any room, wall, or yard and get its area in square feet, with conversions for multi-part and L-shaped spaces.
Tile Calculator
Find out how many tiles and boxes you need for a floor or wall, including the grout gap between tiles and a standard waste allowance for cuts.
Paint Calculator
Work out how many gallons of paint and primer a room needs, based on wall area, the number of coats, and standard coverage rates.
Concrete Calculator
Calculate the volume of a slab, footing, or post hole in cubic yards, and how many 80 lb and 60 lb bags of mix that works out to.
Mulch Calculator
Enter the size of your beds and the depth you want, and get the cubic yards or bags of mulch required to cover them.
Gravel Calculator
Estimate gravel, crushed stone, or sand by volume and weight, with an adjustable density for different stone types.
Flooring Calculator
Plan laminate, luxury vinyl plank, or hardwood flooring, with material-specific waste allowances and box counts based on coverage per box.
Deck Board Calculator
Calculate how many deck boards you need for a deck surface, based on deck size, board width, and the gap between boards.
Drywall Calculator
Count the 4 x 8 ft and 4 x 12 ft drywall sheets needed for walls and ceilings, room by room.
Wallpaper Calculator
Estimate how many rolls of wallpaper a room takes, allowing for pattern matching and trimming.
Planning a whole project?
If your project combines several materials, start with the Project Guides hub, which walks through common jobs step by step, or check likely costs first in the Cost Guides hub.