Syringe yield per patient: product cost calculator
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This calculator is financial. It does not indicate volume or technique: the volume for each plan is the decision of the qualified professional, after assessment. What it answers is how much the volume you have already planned costs in product, how many syringes will be opened, how much is left over and what that does to your margin.
The math matters because a filler syringe is single-use, according to the package insert. What is left is discarded, and the cost falls on the patient who opened the syringe. The starting values are a hypothetical example. Nothing you type leaves your device.
What does each field mean?
| Field | What to enter |
|---|---|
| ml per syringe | The volume of the presentation you use, as on the packaging. |
| Syringe cost | What you pay per unit, including shipping. |
| Planned ml for the patient | The total volume of that session's plan, set in your assessment. |
| Price charged per ml | The price per ml in your quote. |
What is the formula?
- Syringes opened = planned ml ÷ ml per syringe, rounded up.
- Discarded leftover = syringes opened × ml per syringe minus planned ml.
- Yield = planned ml ÷ ml opened.
- Patient's product cost = syringes opened × syringe cost.
- Real cost per ml used = product cost ÷ planned ml.
- Revenue minus product = planned ml × price per ml minus product cost.
The last line is not profit yet: supplies, chair time, taxes and fees still come out of it.
Worked hypothetical example
Hypothetical example: a 1 ml syringe at R$ 700.00, a 1.5 ml plan and a price of R$ 1,500.00 per ml.
| Result | Calculation | Value |
|---|---|---|
| Syringes opened | 1.5 ÷ 1, rounded up | 2 |
| Discarded leftover | 2 minus 1.5 | 0.5 ml |
| Yield | 1.5 ÷ 2 | 75% |
| Product cost | 2 × 700 | R$ 1,400.00 |
| Real cost per ml used | 1,400 ÷ 1.5 | R$ 933.33 |
| Revenue minus product | 1.5 × 1,500 minus 1,400 | R$ 850.00 |
With 2 ml in the same plan, revenue minus product would be R$ 1,600.00. The half ml discarded cost R$ 350.00 and weighs on the margin of anyone who charges only for the ml applied.
How do you use the result in pricing?
The real cost per ml used is the number that should go into the price when the plan does not use whole syringes. Use it in place of the nominal cost in the price per ml and margin calculator, or adopt a minimum per syringe as described in the guide to pricing by ml.
In the conversation with the patient, explain the rule beforehand, in the quote. Requests to "just do a little for less" are easier to answer when the rule is in writing. See discount requests.
What are the limits of the calculation?
- It considers a single syringe presentation. Plans with different products per area need one calculation per product.
- It does not indicate the right volume or say whether the leftover should be used in another area of the same patient: that is a clinical decision, at the discretion of the qualified professional.
- It does not include supplies, chair time or taxes. For the full price, use the price per ml calculator.
- To know how much the patient is worth over future visits, see the patient LTV calculator.
Frequently asked questions
How many ml are in a syringe of hyaluronic acid?
It depends on the manufacturer's presentation. 1 ml syringes are common, but other volumes exist. Check the packaging and the package insert of the product you use.
Can I save the leftover from a syringe for another patient?
No. A filler syringe is single-use, according to the package insert, and the leftover must be discarded. That is why the patient's product cost is that of the syringes opened, not of the ml applied.
How do you calculate the product cost per patient for filler?
Divide the planned ml by the syringe's ml and round up: that is the number of syringes opened. Multiply by the syringe cost to get the patient's product cost.