How many units of Botox do I need?
Typical ranges by area, why two people with the same lines can need very different doses, and how to verify what you actually received.
Written by Ben Tracy, MD, physician injector, Draper and Lehi, Utah. Last reviewed September 13, 2026.
There is no correct number of units for an area, only a correct number for your muscles. Published dosing ranges exist and are useful as a starting point, but two people with identical lines can need doses that differ by half again, because the variable that matters is how strongly the muscle pulls, not how old the face is.
Typical ranges by area
These are the ranges in common clinical use, and where a manufacturer has an approved dose I have said so. Treat them as the middle of a distribution, not a prescription.
One caveat before the table. It is organized by area because that is how the doses were studied and approved, one area at a time, and it is how you will be quoted. That structure is real. What it does not capture is that these muscles pull against each other, so a dose that is reasonable for one area in isolation can be the wrong dose once you account for what is being treated beside it. More on why that matters.
| Area | Typical range | Notes |
|---|---|---|
| Glabella, the elevens | 20 units | The FDA approved dose for Botox Cosmetic in this area, across five injection points. |
| Forehead lines | 10 to 20 | Approved at 20 units when treated together with the glabella. Where the units are placed matters more here than how many. |
| Crow’s feet | 12 per side | 24 total is the approved dose, three points per side. |
| Brow lift | 2 to 6 | Small doses into the depressors. Among the most technique sensitive things done with neurotoxin. |
| Bunny lines | 4 to 8 | Often needed after glabellar treatment, as the nose compensates. |
| Lip flip | 4 to 8 | Very small doses. Too much and speech and drinking are affected. |
| Masseter, per side | 20 to 30 | Off label. Dose differs for jaw slimming and for clenching, and so does placement. |
| Chin dimpling | 4 to 8 | Small area, easy to overtreat. |
Ranges reflect common practice and approved labelling for onabotulinumtoxinA. They are not a plan, and several of these uses are off label.
Why muscle strength beats age as a predictor
A person in their late twenties with a powerful frontalis can need more product than someone twenty years older with a weak one. Strength is visible in the room: how deep the folds get at full contraction, how quickly the muscle recruits, how much of the forehead moves as one sheet rather than in sections.
This is the whole reason a number quoted before anyone has looked at your face is a guess. If a price is given to you over the phone with a unit count attached, you are being sold a package rather than assessed.
How to know how many units you actually received
This is the question almost nobody answers online, and it is the one patients most often want answered.
Neurotoxin comes as a powder in a vial and is reconstituted with saline before use. How much saline goes in determines how concentrated the result is. The same volume injected, say 0.1 mL, can contain two units or five depending entirely on that dilution. So volume tells you nothing on its own.
Three questions any injector should answer without hesitating:
How many units did I receive in total, and how were they distributed by area? What dilution do you use, and how many units are in each 0.1 mL? Can I see the vial?
A practice quoting an unusually low price per unit is sometimes simply efficient. It can also mean a heavily diluted vial, where you are charged for more units to receive the same effect. Asking about dilution is how you tell the difference, and it is a completely normal question.
Why more units is not the same as a better result
Most disappointing upper face results are not underdosed. They are misdistributed. The forehead is not one uniform muscle; it behaves differently across its height, and the region that holds your brow up is not the region that creates the lines you dislike. Treating it evenly across the whole surface is what produces a smooth forehead and a heavy brow at the same time.
That distinction is the subject of the method I published, and it is why the dose conversation is less important than the placement conversation.
General information, not medical advice, and not a substitute for assessment. Individual anatomy and product response vary, so nothing here predicts your result.