Buy the right amount the first time
Running short mid-project means another store trip and mismatched batches; over-buying wastes money. Each calculator includes the industry-standard waste allowance for that material (for example 10% for straight-laid flooring, 15% for diagonal tile) and rounds up to the packs, bags or boxes you actually buy.
US and metric units
Switch between imperial (feet, inches, square feet, cubic yards, gallons) and metric (metres, square metres, cubic metres, litres) at any time — your inputs convert automatically.
Frequently asked questions
How accurate are material estimates?
They use standard coverage rates. Always check the coverage printed on your specific product and round up for irregular rooms.
Should I include doors and windows?
Paint, wallpaper and drywall calculators let you subtract openings for a tighter estimate.