Measuring a room for flooring
Measure wall to wall at the widest points, including under door casings and into closets you plan to floor. For irregular rooms, split the floor into rectangles, add the areas and use “Total area” mode.
Pack coverage is printed on the box (e.g. 19.8 ft² or 2.13 m²). Always round up to whole packs — retailers rarely sell partial boxes — and keep one unopened pack for repairs.