Calculate how many packs of flooring or parquet boards you need, based on room size, coverage per pack and recommended waste.
The calculator first adds waste to the area, then divides by the coverage per pack, rounded up to whole packs:
Since you can only buy whole packs, the actual coverage will often end up slightly larger than the area with waste — the calculator shows you this actual coverage so you know how much surplus you'll have.
10% is a common rule of thumb for straight laying in a simple rectangular room. For diagonal laying, pattern laying, or rooms with many corners and alcoves, budget 15% or more.
Yes, it's recommended to keep a few boards or planks in reserve for future repairs, since color shades and production batches can vary over time.
Laying diagonally or in a pattern such as herringbone produces significantly more cutoff and therefore higher waste than straight laying along or across the room. Plan your laying direction before calculating the amount.