Hardwood Flooring Calculator

Hardwood ordered by the carton is the floor area with waste, divided by the square feet in one pack. A straight lay often stays near 10 percent waste. A border, a staircase landing, and a herringbone do not. The pack size starts at 20 sq ft, so replace that figure with the carton before you order.

Hardwood sold by the pack is an area problem. The calculator multiplies the room and divides by the pack. It is the same code path as laminate, and the unit test requires the two results to match for the same inputs. A 4 by 3 room is 12 square metres. Ten percent waste is 13.2. Packs of 2 square metres are 6.6, which round up to 7. If the pack says 1.68 square metres, type 1.68. Do not round the pack size up before the division. The ceil happens once, at the end.

Waste is the whole allowance for cuts, a bowed wall, and a damaged board. A straight plank floor with a simple border may live with 10 percent. A herringbone or a border in another species wastes more at every change of direction. Raise the field. Do not also add a spare pack in your head and then forget you did both. If you want one spare pack, order the calculated packs and add one at the yard, and keep the calculation itself honest.

Boards sold by the linear metre belong on the square-metres-to-linear-metres page, using the cover width. Using both pages for the same floor double-orders. Underlayment is its own roll count. Baseboard is the perimeter minus doors. None of those are inside the pack. Acclimation and grade are product instructions, not maths.

An L-shaped room should be summed first. If you run this page twice, each run applies waste, which is fine, but a shared cut might be counted twice. Adding the areas and applying waste once is usually closer. There is no price per pack on this page. The flooring cost calculator takes a price per square foot you type, including zero.

Room length starts at 12 ft. Room length in feet. Switch to m / cm for metres. Room width starts at 10 ft. Room width in feet. Switch to m / cm for metres. Waste allowance starts at 10 %. Straight lay often uses less than a diagonal or a herringbone. The percentage is yours. Pack size starts at 20 sq ft. Coverage of one pack in square feet.

A second worked room keeps the pack maths visible. A 16 × 12 ft room is 192 sq ft. At 8 percent waste the order area is 207.36 sq ft. A pack marked 20 sq ft is 207.36 divided by 20, which is 10.37, so 11 packs. The ceil happens once. If you round the area to 22 first and then divide, you can add a pack you did not need. Keep the waste in the field and let the function round. Straight plank in one direction, with the boards parallel to the long wall, usually wastes less than a diagonal. If you change direction in a hallway, treat the hallway as its own rectangle so the offcuts are not assumed to travel around the corner. They sometimes do, and you can lower waste if you know you will use them. Moisture, acclimation, and the direction relative to the joists are installation rules on the pack, not inputs. Underlayment rolls are the underlayment calculator. A glue-down floor may not need underlayment and may need a trowel coverage from the adhesive bag, which is the thinset page pattern: type the coverage, do not expect a chart. Nails or staples are not counted. The flooring cost page can price the square metres after you type a price. It does not know the pack size.