Flooring Calculator

Flooring is the one material where under-ordering is genuinely painful. Plank flooring is sold in runs from a single production batch, and a re-order six weeks later can arrive with a visible colour shift that no amount of feathering will hide.

Measure the longest point of each dimension, not the average — rooms are rarely square, and the extra strip along one wall still has to be covered. For L-shaped rooms, split the space into rectangles, run each one, and add the box totals.

How this calculator works

Every field is editable and the result updates as you type — nothing is submitted anywhere, all the maths runs in your browser. That matters for a number you are about to spend money on: you can see exactly which input moved the answer, and by how much.

What this calculation assumes

Assumes a single rectangular room and a box coverage taken from the carton label. Underlayment, transition strips, stair nosing and baseboard are not included in either the quantity or the cost.

Treat the result as an order-of-magnitude check rather than a final quantity. Product packaging changes, regional labour rates vary by a factor of two, and no calculator has seen your actual site.