15×20 Room Square Feet
A 15 ft by 20 ft rectangular room has 300 square feet of floor area.
Quick answer
300 sq ft
With 5% waste315.0 sq ft
With 10% waste330.0 sq ft
With 15% waste345.0 sq ft
How this works
For a rectangular room, multiply length by width: 15 × 20 = 300 square feet. Flooring and tile projects usually require an additional waste allowance.
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