Free Square Footage Calculator – Area in Sq Ft & Sq M

How to Calculate Square Footage of a Room or Floor

Square footage is the floor area of a space, and it is the number almost every home-improvement quote starts from. Enter a length and width, pick feet or metres, and this calculator returns the area in both square feet and square metres, with an optional cost if you add a price per square foot. Anyone buying flooring, tiles, carpet, or paint needs it, as do people comparing property listings where one agent quotes square feet and another quotes square metres. Contractors quote per square foot, suppliers sell by the box or tin covering a stated area, and a wrong area figure means either a second trip to the shop or a pile of leftover material. The formula is area = length × width, with both measurements in the same unit. Multiply by the number of identical areas if you are totalling several rooms at once. Unit conversion runs on a fixed factor: one square foot equals 0.09290304 square metres, so dividing square feet by that number converts the other way. Cost is simply area multiplied by your price per square foot. For rooms that are not rectangles, break the shape into rectangles, calculate each, and add the results — an L-shaped room of 12 by 10 feet plus an 8 by 6 foot section comes to 120 + 48 = 168 square feet. Here is a real measurement. A bedroom measuring 15 feet by 13 feet gives 15 × 13 = 195 square feet, which is 18.12 square metres. If vitrified tiles cost ₹85 per square foot, the material estimate is 195 × 85 = ₹16,575 before wastage. A metric example: a room 4.5 metres by 3.6 metres is 16.20 square metres, or about 174.4 square feet — useful when a builder's plan is in metres and your tile supplier quotes in feet. The uses are practical and varied. A homeowner buying a rug measures just the seating area rather than the whole room, so the furniture layout still works and the rug does not swallow the floor. Someone laying laminate across a hall and two bedrooms totals all three areas to place a single order, avoiding both a second delivery charge and the risk of a mismatched batch. A shop owner planning an interior fit-out uses the figure to price both flooring and false ceiling from the same number, since contractors quote both per square foot of the same footprint. And a buyer comparing two flats listed at 1,150 square feet and 108 square metres can see the second is slightly larger at about 1,163 square feet, a gap of roughly 13 square feet that a listing in mixed units hides completely. One caveat that costs money: always order more material than the bare area suggests. Tiles break, laminate needs trimming at edges, and diagonal or patterned layouts waste more, so add 8 to 10 per cent for straightforward rectangular rooms and up to 15 per cent for diagonal patterns or awkward shapes. The second thing beginners get wrong is measuring in mixed units — a length in feet multiplied by a width in metres produces a meaningless number, so convert first. Measure at floor level rather than at eye height, take the widest points, and check the diagonals if you suspect the room is not truly square. Also remember that carpet area, built-up area, and super built-up area mean quite different things in Indian property listings, and the gap between carpet and super built-up can be 25 per cent or more, so always confirm which one a quoted figure refers to. Everything runs entirely in your browser, so your measurements and pricing stay private on your own device.

Square Footage Calculator Formula & Method

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