Ending Inventory Calculator

This calculator relies on fundamental accounting relationships to solve for missing inventory values. The primary formula used to find ending inventory is: Ending Inventory = Beginning Inventory + Net Purchases - Cost of Goods Sold (COGS). Furthermore, the tool evaluates operational efficiency using the inventory turnover ratio, defined as: Inventory Turnover = Cost of Goods Sold / Average Inventory, where Average Inventory is equal to (Beginning Inventory + Ending Inventory) / 2. These equations provide a complete picture of both inventory valuation and liquidity.

Imagine you manage a retail boutique. At the start of the quarter, your Beginning Inventory was valued at $40,000. Throughout the period, you acquired Net Purchases totaling $85,000 in new merchandise. Your financial records indicate that the Cost of Goods Sold (COGS) for the items sold during this timeframe was $90,000. To find your Ending Inventory, use the formula: $40,000 (Beginning) + $85,000 (Purchases) - $90,000 (COGS), which equals $35,000. To evaluate your turnover, the average inventory is ($40,000 + $35,000) / 2 = $37,500. Dividing your COGS of $90,000 by this average yields an inventory turnover ratio of 2.4, meaning your stock completely cycled through 2.4 times during the quarter.

Always ensure your accounting period dates match consistently across beginning inventory, purchases, and COGS figures. Mismatched timelines can severely distort your balance sheet and tax liabilities. Additionally, regularly perform physical inventory counts to reconcile theoretical ending inventory numbers calculated here with actual warehouse stock, helping you catch shrinkage, damage, or record discrepancies early.