Inventory turnover is a foundational supply chain and working capital efficiency metric. It measures how many times your business sells and replaces its total stock over a defined period (annually or quarterly). Paired with Days Sales of Inventory (DSI), this calculator identifies dead inventory, reveals carrying cost leaks, and prevents costly stockouts—allowing you to free up trapped cash and scale operational liquidity.

Top-line store revenue and gross markup often mask dangerous cash drains. A product line that appears profitable on a gross-margin basis can quickly turn cash-negative once you factor in pick-and-pack fulfillment, courier postage, payment processor merchant fees, paid advertising customer acquisition costs (CAC), and customer returns. This calculator models your true per-order net profit and Contribution Margin (CM), revealing your actual pocketed cash per checkout.

Selling via Fulfillment by Amazon (FBA) gives brands access to Prime logistics and millions of active buyers, but marketplace deductions can quickly consume product margins. Category referral fees (8% to 15%), FBA pick-and-pack size tier charges, inbound freight shipping, monthly storage, and Amazon PPC ad spend frequently erode theoretical markups. This calculator isolates your true take-home cash profit and return on investment (ROI) per Amazon unit sold.

Transitioning from direct-to-consumer (DTC) sales into wholesale distribution requires a disciplined, multi-tier pricing architecture. If you set your retail price (MSRP) without leaving adequate gross margin for retail stockists (who typically demand 50% wholesale margins or 2x keystone markups), you risk pricing yourself out of physical stores or cannibalizing your own business profit. This calculator establishes sustainable wholesale prices and balanced retail markups from your base cost of goods.