What this flooring calculator is estimating
Flooring is usually sold by square footage, but the boards themselves are packaged in fixed plank sizes and often fixed box quantities. That means a useful flooring calculator has to do more than measure room area. It should translate the room into practical coverage, plank count, and box count so you can make a purchase plan rather than just a geometric estimate.
This is why a flooring square footage calculator is useful for laminate, LVP, engineered wood, and many click-lock products. It gives you a practical area target, then converts that area into individual boards and optional box totals so you can compare the estimate with the packaging of the product you plan to install.