How Many Units of Botox Do I Need?

If you’re looking to get Botox as a cosmetic treatment for your wrinkles and other signs of aging, you likely want to know, “How many units of Botox do I need?” 

The answer? It depends. 

Botox is a tailored cosmetic treatment that’s unique for each person depending on their particular cosmetic goals and treatment areas. In this article, we’ll break down the intricacies of Botox and how many Botox units you can expect for your next treatment. 

What is a Unit of Botox?

Botox is measured in units because it ensures an exact amount of the neurotoxin is administered, so you get the precise amount needed for your treatment area. 

Too much Botox in a location, for example, may result in a “frozen” look, devoid of emotion and movement. Because Botox causes muscle paralysis, it can also cause heavy drooping or sagging in areas that receive too much of the neurotoxin. Measuring Botox in units also makes it easier for the aesthetician to administer. 

How Much Does a Unit of Botox Cost?

A single unit of Botox, on average, costs $10 to $15. Usually, an average Botox treatment is in the range of 40-50 units, meaning the average cost for a botox treatment is between $400 and $600. Forehead injections (20 units) and eyebrow lines (up to 40 units), for example, would be approximately $600 for the full treatment.

Factors that Impacts How Many Botox Units You Need

As mentioned earlier, gender, age, and the characteristics of the injection site all play a role in determining the amount of Botox that you need. Below, we outline the major factors involved in determining the amount of Botox we inject. 

Muscle Strength

Botox relaxes facial muscles. This means that the strength of your muscles determines how many units of Botox you’ll need. Typically, men tend to have stronger facial muscles compared to women, so men need more units of Botox. 

Additionally, the forehead usually has the strongest facial muscles, which is why on average, it requires more units than other injection sites. 


Botox is a neurotoxin, which means the body will naturally metabolize it. That said, the faster your metabolism is, the faster the Botox will wane. Similarly to muscle strength, men tend to have a higher metabolism compared to women, so men usually need more treatments and higher dosages to maintain results. 

Cosmetic Goals

While it may seem obvious, the actual amount of wrinkles you want to remove factors into how much Botox you’ll need to achieve your cosmetic goals. 

Frequency of Application

If it’s your first time receiving a Botox injection, in most cases, you’ll receive a lower dosage (typically one to two units per site instead of four to five units) compared to a return visit. This is to gauge your body’s response to Botox. After about two months, you’ll be assessed and given additional injections in order to achieve your desired results. 

How Many Units Can I Get in an Average Treatment?

An average Botox procedure uses about 50 units at a time, with the maximum safe amount being 100 units. Typically, you can expect more Botox units if you want to target more dynamic wrinkles like frown lines, forehead lines, or smile lines. 

Schedule a Consultation at Elite Facial Plastic Surgery

At Elite Facial Plastic Surgery, Dr. Dominic Castellano, a double board-certified surgeon who also specializes in non-invasive cosmetic treatments, will guide you through the process of determining your cosmetic goals and help you achieve them with Botox. 

Every cosmetic procedure is different, so to get the best idea of what your next Botox injection will look like, we recommend scheduling a consultation. Discuss your options with a double-board certified plastic surgeon today by calling Dr. Castellano at (813) 547-6992.

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