Convert the bottle into the same unit you track per appointment.
One liter is about 33.8 US fluid ounces. If your workflow is measured in ounces per tan, convert the bottle first so the rest of the math uses one unit.
Divide bottle ounces by your average ounces per tan.
If you average 2 ounces per appointment, a 33.8-ounce liter works out to about 16.9 theoretical tans before accounting for waste, priming, spills or heavier-use appointments. Your real number may be lower, which is why tracking your own average is more useful than relying on a universal claim.
Turn tans per bottle into days of supply.
Once you know roughly how many appointments a bottle covers, compare it with your weekly volume. That tells you whether the inventory on the shelf represents a few days, a week or several weeks of appointments.
Set the reorder point before zero.
Supplier lead time and your upcoming calendar matter. A small intentional buffer is usually cheaper than emergency shipping or being unable to perform the service you already sold.
Inside Tan Concierge
Use your actual usage rate
The free solution usage calculator estimates tans per bottle, monthly ounces, bottles needed and days of supply from your own workflow.
TRY TAN CONCIERGE FOR $1Questions, answered
What artists usually want to know.
How many ounces are in a liter of spray tan solution?
One liter is approximately 33.8 US fluid ounces.
Why does the number of tans per liter vary?
Technique, equipment, client size, overspray and how much solution you personally use per appointment can all change the result.
Tan Concierge
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