Room Area & Flooring Calculator
Calculate room area and flooring materials needed
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Room Area & Flooring Calculator helps you calculate room area and flooring materials needed — free, instant, in your browser. Fill in Length (ft), Width (ft) and Waste % on Room Area & Flooring and read your answer immediately. Room Area & Flooring displays each intermediate figure as well. Use Room Area & Flooring for a reliable number, fast. No account is needed for Room Area & Flooring. The browser does the arithmetic. Looking for room area & flooring calculator or free online room area & flooring calculator? Room Area & Flooring covers both. Room Area & Flooring shows formula, assumptions and result together. No sign-up or email — Room Area & Flooring answers as you type.
What the defaults give
A 12 ft by 14 ft room is 168 square feet. With a 10% waste allowance that is about 185 sq ft of flooring to buy.
Area is length × width; the waste allowance is not padding, it is the material consumed by the last row, doorway cuts and any damaged boards.
The arithmetic
Area = length × width. 12 × 14 = 168 sq ft. Add 10%: 168 × 1.10 = 184.8, or about 185 sq ft.
In metric: 3.66 m × 4.27 m = 15.6 m², plus waste = 17.2 m². Roughly 10.76 sq ft per square metre, which is why the two figures look so different.
Worked example
Room 12 ft × 14 ft
Area = 168 sq ft
Waste 10% → 16.8 sq ft
Order ≈ 185 sq ft
Measuring a room that is not a rectangle
Split the floor into rectangles, measure each and add them. An L-shaped room measured as one bounding rectangle overstates the area badly — a 12 × 14 rectangle with a 4 × 6 section missing is 144 sq ft, not 168. Allow a little more waste for each additional corner, since every notch produces offcuts.
What the area does not include
- Fitted units. Wardrobes and kitchen cabinets sit on the floor; measure the visible floor, not the wall-to-wall figure.
- Underlay and adhesive. Separate products measured on the same area.
- Skirting and thresholds. Priced by the linear metre, not the square metre.
- Stairs. Measured by tread and riser count, not by floor area.
Ordering
Convert the area into packs using the coverage printed on the box and round up. Buy the spare pack with the original order: the same product from a later production run can differ visibly in shade, and a single short pack means a second order.
Frequently Asked Questions
How many square feet is a 12 × 14 room?
168 square feet — 12 × 14. Add 10% waste and you need about 185 sq ft of flooring.
How much waste should I allow?
10% for a simple rectangular room laid straight. Use 15% for diagonal layouts, rooms with many corners, or a first installation.
What is 168 sq ft in square metres?
About 15.6 m², since a square metre is 10.76 sq ft. With waste, order roughly 17.2 m².
Do I measure under kitchen cabinets?
No, if they are staying. Measure only the floor that will be covered — the same applies to fitted wardrobes and appliances you cannot move.
Is the waste allowance refundable?
Often the unopened spare pack is returnable, which is why buying it up front costs nothing if the job goes to plan and saves a mismatched second order if it does not.
How many packs for a 20 m² room at 2.2 m² per pack?
20 × 1.10 = 22 m² with waste, and 22 ÷ 2.2 = 10 packs exactly. Rounding up from an exact fit is still wise: 10 packs leave no spare for a damaged board, so most fitters buy 11.
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