Estimate how long a professional massage practice product container will last based on usable volume, product used per service, services performed, and expected waste. The calculator also shows cost per application and a reorder date buffer, helping prevent stockouts without pretending that every container yields its labeled maximum.
The main result estimates calendar duration for one container at the entered service pace. Reorder timing subtracts supplier lead time and safety stock from the expected stockout date.
Actual yield varies with dispensing technique, service mix, and product loss. Measure multiple containers for a stronger planning average.
A 3785 mL container with 6% waste leaves 3557.9 mL usable. Dividing by 30 mL per service estimates usable applications; weekly demand converts that yield into duration.
Yes, if container size and use per service are entered in the same volume unit; the displayed mL labels should then be interpreted as that unit.
Waste represents product that is purchased but cannot be used in a billable service.
Enter zero services per week; yield and cost per use can still be calculated, but calendar duration is not finite.
It reports the number of days from now to order, based on duration minus lead time and safety buffer.
No. This calculator expresses the buffer as days of expected demand.
| Variable | Meaning | Unit |
|---|---|---|
| Container size | Labeled product volume | mL |
| Use per service | Average product consumed per appointment | mL/service |
| Waste rate | Purchased product not usable in services | % |
| Lead time | Expected supplier delivery time | days |