Turn cosmetic clinic product inventory into a practical treatment and reorder estimate. Enter the usable amount in a container, average amount dispensed per treatment, weekly treatment volume, and an allowance for priming, spills, or unusable remainder. The calculator shows usable product, treatments per container, and expected duration in weeks and days. Use one consistent unit and compare the estimate with expiration and storage guidance.
Enter the container's usable labeled amount, average consumption for one cosmetic clinic service, weekly service volume, and a realistic waste allowance.
The estimate converts a container into a practical replenishment timeline based on current workload.
Actual duration can differ because treatment protocols, dispenser calibration, staff technique, and product expiry vary.
A 500 mL container with 5% waste provides 475 mL. At 5 mL per service, that is 95 services. With 20 services per week, it lasts about 4.8 weeks.
Yes. Include any amount that cannot be reliably used in the waste allowance.
Yes. Use the same unit for container amount and amount per treatment.
Measure several representative treatments and divide total measured usage by the number completed.
No. Compare calculated duration with manufacturer expiration, storage, and period-after-opening instructions.
Combine their expected weekly usage in the same unit or calculate each service and add its weekly product demand.
| Duration | Planning signal |
|---|---|
| Under 1 week | Urgent or high-frequency replenishment |
| 1–4 weeks | Frequent stock review |
| Over 4 weeks | Routine inventory review |