Measure area in square feet, metres or yards for any room shape, plus material cost.
Area is calculated for the chosen shape in the specified input unit, then converted to square feet (and optionally square metres and square yards). A waste factor is applied to account for cuts and spoilage — standard recommendations are 10% for straight-lay floors, 15% for diagonal or herringbone patterns. If a per-square-foot material cost is entered, the total cost estimate includes the waste allowance.
Rectangle
Area = Length × Width
Circle
Area = π × radius²
Triangle
Area = ½ × base × height
Area with waste
Total area = net area × rooms × (1 + waste%)
Select 'L-Shape' and measure the two rectangles that make up the L. Enter each rectangle's length and width and the calculator adds the areas.
10% for straight-lay patterns, 15% for diagonal or herringbone. For tile, 10–15% depending on cut complexity. The waste is built into the 'with waste' figure used for the material cost estimate.
Yes — select your input unit (feet, inches, yards, metres, centimetres). The result is always shown in square feet and converted to square metres and square yards automatically.
Measure the walls as rectangles. Most paint covers 350–400 sq ft per gallon. Divide your total wall area by the coverage rate to get gallons needed.