Free inventory tool
Estimate how many days your current stock can cover, when to reorder, and whether your safety buffer is at risk.
Stock cover equals current units divided by average daily usage. Reorder timing should also include your safety buffer and supplier lead time.
Enter your current stock, daily usage, and buffer days to estimate cover and reorder timing. Runs fully in your browser.
StockMitra turns the same logic into repeatable stock checks, item records, low-stock signals, and review history for teams.
Stock cover = current units ÷ average daily usage. For example, 240 units with 20 units used per day gives 12 days of stock cover. This tells you how many days of supply remain at current usage rates.
Reorder when your remaining stock cover equals your buffer days plus supplier lead time. Use a reorder point calculation that accounts for average daily usage, lead time, and a safety buffer. The reorder calculator above shows the exact day to place your next order.
A safety buffer is the minimum number of days of stock you want available before an order arrives. It protects against delivery delays, demand spikes, and counting errors. Set it based on how reliable your supplier is and how critical the item is to daily operations.
