Sketch the floor
Draw the outline of each room. Split irregular rooms into rectangles that do not overlap. Label each section so you can match it to the calculator.
Measure each rectangle
Record the length and width of every section in feet. Convert inches to decimal feet: 6 inches is 0.5 feet. Include the areas you actually intend to cover.
Add your rooms
Enter each room or section in the flooring calculator. The areas are added before the allowance and whole-box rounding. Combine only areas using the same flooring product.
Check your product
Use the square-foot coverage printed on the box and your actual price per box. Choose an allowance with your installer or product instructions; the starting value is only an example.
Rectangle A: 12 × 10 = 120 sq ft. Rectangle B: 6 × 5 = 30 sq ft. Combined area: 150 sq ft before an allowance.
Keep in mind
Avoid counting the overlap twice. Different flooring products need separate estimates. Underlayment, trim and installation are not included.
Planning guidance only. Confirm measurements and product requirements before buying. Read the calculator disclaimer.