There are multiple allocation methods that businesses can use when allocating products across warehouses, but the best approach to distributing products across different warehouse locations is to look at historical order data and split inventory across locations according to past order trends, best-sellers, items frequently purchased together, and more.
If you’re just launching your online business and you want to sell across the US, you might consider choosing a centralized warehouse location, such as somewhere in Midwest, to optimize shipping costs and transit times.