Inventory control, EOQ, ABC analysis, and costing calculators. Browse our free inventory tools below — all calculators are instant, accurate, and require no sign-up.
ABC-XYZ Matrix Calculator — Combine ABC value analysis and XYZ demand variability into a 9-cell matrix to set differentiated inventory management strategies.
ABC Analysis Calculator — Classify inventory into A, B, and C categories based on annual value using Pareto analysis to prioritize stock management efforts.
Days of Supply Calculator — Calculate how many days your current inventory will last based on average daily usage. Plan replenishment before stock runs out.
Cycle Count Planner Calculator — Plan cycle count frequency by ABC classification. Calculate annual counts per SKU class and total daily counting workload for your warehouse.
FIFO Inventory Cost Calculator — Calculate cost of goods sold and ending inventory using the FIFO method. Assign oldest purchase costs to sales first for accurate COGS.
Dead Stock Calculator — Identify and value dead stock — inventory with zero sales over a defined period. Calculate total capital tied up in unsellable items.
Fill Rate Calculator (Unit Fill Rate) — Calculate unit fill rate by dividing units shipped from stock by total units ordered. Measure inventory service performance accurately.
Holding Cost Percentage Calculator — Calculate your true inventory holding cost percentage by summing capital, storage, insurance, and obsolescence costs as a share of value.
Inventory Accuracy Calculator — Calculate inventory record accuracy by comparing matching records to total records. Measure how well your WMS data reflects actual stock.
Inventory Write-Down Calculator — Calculate inventory write-down amounts when net realizable value drops below book value. Determine the impact on COGS and financial statements.
LIFO Inventory Cost Calculator — Calculate cost of goods sold and ending inventory using the LIFO method. Assign newest purchase costs to sales first for tax-efficient COGS.
Line Fill Rate Calculator — Calculate line fill rate by dividing order lines shipped complete by total order lines. Measure SKU-level fulfillment performance.
Order Fill Rate Calculator — Calculate the percentage of customer orders shipped complete from stock. Measure order-level inventory service performance easily.
Obsolescence Reserve Calculator — Calculate inventory obsolescence reserves using age-based tiered factors. Estimate reserves by multiplying units, cost, and aging discount rates.
Ordering Cost Calculator — Calculate total annual ordering cost by dividing annual demand by order quantity and multiplying by the fixed cost per order placed.
Perfect Order Rate Calculator — Calculate your perfect order rate by combining on-time delivery, in-full shipment, damage-free, and documentation accuracy percentages.
Slow-Moving Inventory Calculator — Identify slow-moving inventory where demand falls below a threshold. Calculate excess stock value and recommend disposition actions.
Perpetual vs Periodic Inventory Calculator — Compare costs of perpetual (WMS + real-time tracking) vs periodic (manual counts) inventory systems including labor, tech, and stockout risk.
Total Inventory Cost Calculator — Calculate total inventory cost by summing carrying costs, ordering costs, and stockout costs to find your true inventory expense.
Stockout Cost Calculator — Estimate the total cost of inventory stockouts including lost sales margin, backorder costs, and customer churn impact on revenue.
Weighted Average Cost Calculator — Calculate inventory cost using the weighted average method. Divide total cost by total units for a blended cost per unit across all purchases.
Weeks of Supply Calculator — Calculate how many weeks your current inventory will cover based on average weekly usage. Ideal for medium-term supply planning.