Room Size Calculator
Calculate room area, square footage, square meters, perimeter, and flooring estimate from room length and width.
ft
ft
%
Area 168 sq ft
Area 15.61 sq m
Perimeter 52 ft
Flooring With Waste 181.44 sq ft
Wall Area At 8 ft Height 416 sq ft
Suggested Material Order 182 sq ft
Room Area Formula
Area = Length x Width
Perimeter = 2 x (Length + Width)
Flooring with waste = Area x (1 + Waste %)
Frequently Asked Questions
- For a rectangular room, multiply length x width to get the floor area. If the room is irregular, break it into smaller rectangles, calculate each area, then add them together.
- Measure the room in feet, then use square footage = length x width. A 12 ft by 14 ft room is 168 square feet.
- Multiply square feet by 0.092903 to get square meters. To go the other way, multiply square meters by 10.7639.
- Yes. Room size calculators are commonly used for flooring, paint planning, carpet estimates, and furniture layout. It is smart to add waste allowance when ordering materials.
- Perimeter is the total distance around the room. It is useful when estimating baseboards, trim, wall framing, or planning how much edging material you need.
- Many installers add 5% to 10% extra for cuts, mistakes, and pattern matching. Complex layouts and diagonal installations often need more.
- Split the room into two rectangles, calculate each area separately, and add them together. This gives a more accurate result than trying to estimate the whole shape at once.
- Yes. This calculator supports both feet and meters, then shows both square feet and square meters so you can use whichever unit is more convenient.