Inventory Days of Cover Calculator
Estimate how many days inventory will last using on-hand stock, daily usage, and inbound quantity.
Result
Estimated coverage: 17.6 days
How to Use This Tool
Input the current inventory quantity available in your warehouse or storage.
Specify how much material you typically use per day in production.
Include confirmed incoming shipments or scheduled deliveries.
See how many days of production your total inventory will cover.
Example Results
Flour Inventory
1200kg on-hand, 85kg daily, 300kg incoming
Sugar Stock
500kg on-hand, 50kg daily, 200kg incoming
Dairy Inventory
2000kg on-hand, 200kg daily, 500kg incoming
Ingredient Reserve
800kg on-hand, 40kg daily, 400kg incoming
Frequently Asked Questions
What is inventory days of cover?
Days of cover represents how many days your current inventory will last at current usage rates. It helps prevent stockouts and optimize ordering schedules by showing when you'll run out.
Should I include reserved or allocated inventory?
Use only unreserved inventory for days of cover calculations. If material is already allocated to specific orders or reserved, don't include it as it's not available for general production use.
How do I handle seasonal demand variations?
Use average daily usage for general planning, but consider seasonal peaks. During high-demand periods, actual days of cover may be less than calculated. Plan accordingly with safety stock.
What's a good days of cover target?
Targets vary by industry and supply chain. Manufacturing typically aims for 7-14 days, retail 30-90 days. Consider supplier lead times, demand variability, and storage capacity when setting targets.
How do I incorporate safety stock?
Safety stock is separate from days of cover calculations. Calculate days of cover on net inventory, then ensure your reorder point includes both safety stock and average usage during lead time.
Can I use this for reorder point planning?
Yes! When days of cover approaches your supplier lead time, it's time to reorder. Combine this calculator with reorder point calculations for comprehensive inventory management.