WOS Calculator (Days,Weeks & Months of Supply)
Find out how many weeks your current stock will last at your average sales rate, and whether you are heading for a stockout or overstock.
Weeks of Supply = Current Inventory ÷ Weekly Sales
Example: 1,000 units in stock ÷ 250 units sold per week = 4 weeks of supply.
Example: 1,000 units in stock ÷ 250 units sold per week = 4 weeks of supply.
Daily and monthly sales are converted to weekly automatically.
Optional: reorder planning
Healthy WOS depends on your product type, lead time and margins. 4 to 8 weeks is only a starting point; change it to fit your business.
Weeks of Supply is a simple estimate that assumes future sales match your average. Seasonality, promotions and trends can change it quickly, so recheck it often. Results are for planning guidance only.