Total sales tell you how busy the counter was. Pharmacy inventory turnover tells you how quickly the inventory investment moved through the business. ABC analysis answers another question: which product lines deserve the most financial attention?
Use both, but do not let financial ranking replace professional decisions about availability.
Calculate turnover on a consistent cost basis
For the same period, divide cost of goods sold by average inventory at cost. A simple opening/closing average is a starting approximation; regular snapshots are better when balances change sharply.
If quarterly cost of goods sold is 300,000 and average inventory at cost is 150,000, turnover is two times during that quarter. For a 90-day period, approximate inventory days are 90 ÷ 2 = 45.
The example is hypothetical. Do not call two quarterly turns an annual turnover of two, and do not compare sales revenue with inventory at cost. Both mistakes produce misleading results.
Document how returns, write-offs and inventory valuation are treated with your accountant. When comparing periods, use the same definition and product scope.
Look beneath the overall figure
A reasonable total can hide fast-moving basic products alongside a large value of slow-moving lines. Compare categories and individual batches where expiry exposure differs.
High turnover is not automatically better. Repeated stockouts can reduce the average stock balance and make the ratio look efficient while customers cannot obtain appropriate supply. Review availability and unavailable-item records beside the financial ratio.
Low turnover also needs context. New lines, seasonal products and a justified reserve can require different interpretation. The question is whether the inventory position matches an explicit plan.
Build a practical ABC ranking
For a chosen period, calculate consumption value for each product: units used × consistent unit cost. Sort descending and calculate cumulative percentage of total consumption value.
Here is a deliberately small hypothetical example:
| Product | Period consumption cost | Share | Cumulative |
|---|---|---|---|
| A | 50,000 | 50% | 50% |
| B | 25,000 | 25% | 75% |
| C | 15,000 | 15% | 90% |
| D | 10,000 | 10% | 100% |
You might review the first two lines more frequently because they represent 75% of consumption cost. Class boundaries are chosen management rules, not universal pharmacy thresholds.
A published ABC–VED drug-store study illustrates the distinction between financial and criticality classifications. A hospital study does not supply an automatic assortment policy or retail-performance benchmark for your shop.
Turn the ranking into decisions
For financially significant products, check counts, supplier lead time, purchase conversion and expiry exposure. For slow-moving products, review reorder settings and return terms. Keep a separate professional review of availability needs; inexpensive stock is not necessarily unimportant.
Use a monthly review sheet with product, consumption value, average stock cost, days of cover, stockouts, expiry exposure and an action owner. Restrict the action list to decisions someone can complete before the next review.
Software teams should make valuation dates and calculation periods explicit. A dashboard should not silently combine current stock cost with last year's sales prices. Export the underlying records so an owner can reproduce the result.
RunMyPharmacy's reports and inventory-management workflow can help you assess the available inputs. The calculations here are spreadsheet methods, not claims of built-in ABC or turnover automation.
Disclosure: written for the RunMyPharmacy team with AI drafting assistance and an editorial check of examples, links and product claims. We build the linked product. Examples are hypothetical; worksheets and illustrative software-design advice are not guarantees of product automation.
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