1 ml equals 1 cc. There is no single right number of ml for lip filler; the amount is set according to the structure of the lips, the facial proportions and the goal. In product studies, the first amount injected into both lips together averaged 1.4–1.6 ml and the top-up averaged 0.6–0.85 ml; these are study averages, not targets. At our clinic the amount at the first session is kept measured, the result is judged after at least 2 weeks and, if needed, a top-up is planned 2–4 weeks later.
One of the questions people considering lip filler ask most often is: "How many ml should I have, and how much difference does 1 ml make?" There is no single right number of ml, because lips are not alike. Still, there are data we can discuss: what ml means, what determines the amount and how many ml were used on average in clinical studies.
Are ml and cc the Same?
Yes. 1 cc (cubic centimetre) equals 1 ml; when people ask "how many cc" of lip filler, the same unit is meant. Filler products are supplied in syringes measured in millilitres, and the physician plans how much of the product will be used in ml.
What Determines the Amount in Lip Filler?
- Starting lip volume and structure: A lip that is already full and a thin lip respond differently to the same amount.
- Upper-to-lower lip ratio: The lips' proportions to each other, to the nose and to the chin are assessed together; the aim is balance.
- The goal: Volume, moisture, contour or correcting asymmetry may call for different amounts.
- Technique and product: Natural lip filler or the Russian lips technique, and the consistency of the product, also affect the plan.
- The physician's assessment: An amount that does not fit the facial proportions, the wrong area, an unsuitable technique or product can lead to an artificial, swollen look.
What Do Clinical Studies Show?
In studies that evaluate the effectiveness and safety of lip filler products, the volumes injected are recorded. The averages from three randomised studies are as follows:
| Study | Average at the first treatment | Average at the top-up treatment |
|---|---|---|
| Weinkle et al., 2025 | 1.43 ml (upper lip 0.70; lower lip 0.74) | 0.60 ml |
| Müller et al., 2024 | 1.59 ml (about 0.8 per lip) | 0.85 ml |
| Weiss et al., 2021 | Not reported separately | Total of first and top-up treatment: 1.82 ml (test product) and 2.24 ml (comparator product) |
This table shows that the first amount injected into both lips together averaged around 1.4–1.6 ml in the studies, with similar amounts into the upper and lower lip; the top-up was done with a smaller amount. In two of the studies the top-up could be given about 4 weeks after the first treatment. These are study averages, however, not targets; the amount you need may be lower or higher. The aim in these studies was a measurable increase in lip fullness.
How Much Difference Does 1 ml Make in the Lips?
The answer depends on your starting point. The same amount can be perceived as a marked change in someone with thin lips and as a much smaller change in someone whose lips are already full. 1 ml is close to the first-treatment averages in the studies, so it cannot be judged on its own as "little" or "a lot". Swelling in the first days makes the lips look larger than they are; because the final shape settles in 1–2 weeks, you wait at least 2 weeks before judging the amount.
Why Start Conservatively at the First Session?
Taking back filler that was added in excess needs a separate dissolving procedure with hyaluronidase. That is why at our clinic in Mezitli the amount at the first session is kept measured; once the result has settled, a top-up is planned 2–4 weeks later if needed. In our article on natural lip filler we explained that for many people more measured amounts at the first session, such as 0.5–1 ml, may be enough; the averages in the studies are higher because the aim in those studies was a measurable increase in fullness and a top-up was part of the protocol. Which amount suits you is decided at the examination after the lip and facial analysis.
Questions You Can Ask Your Doctor
- Amount: How many ml are you planning, and why?
- Distribution: How will the amount be divided between the upper and lower lip?
- Product: What is the name of the product to be used; what is the syringe volume in ml?
- Top-up: If a top-up is needed, when and how much is given?
- Price: Is the price based on the product and the amount (ml)? In our value-for-money guide we explain why ml is not a comparison measure on its own.
The lip filler plan is individual; the technique and amount become clear after the lip and facial analysis. At Dr. Doğan Uysal's clinic the name of the product to be used is shared at the consultation. For what to ask when choosing a doctor, see our article on doctors who perform lip filler, and for the whole treatment our lip filler page.
Frequently Asked Questions
How much difference does 1 ml of lip filler make?
The difference depends on the starting lip volume and the facial proportions; the same amount can be perceived as a marked change in someone with thin lips and as a smaller change in someone whose lips are already full. Because swelling in the first days makes the lips look larger, you wait at least 2 weeks before judging the amount.
How many ml is 1 cc of lip filler?
1 cc equals 1 ml. For lip filler, asking "how many cc" and "how many ml" mean the same thing.
How many ml of lip filler are used on average?
There is no single right amount. In product studies the first amount injected into both lips together averaged 1.4–1.6 ml and the top-up averaged 0.6–0.85 ml; these are study averages. The amount you need is decided at the examination after the lip and facial analysis.
When is a top-up done after lip filler?
At Dr. Doğan Uysal's clinic the amount at the first session is kept measured; at least 2 weeks are allowed before judging the result and, if needed, a top-up is planned 2–4 weeks later.
Does more ml give a more natural result?
No. A natural look depends on proportion, contour, technique and the choice of product rather than on amount; an amount that does not fit the facial proportions can lead to an artificial, swollen look.
Is the price of lip filler set according to ml?
The price of filler is set individually according to the area treated, the product, the amount (ml) and the plan. Clear information is shared at the first consultation, after your facial analysis.
Medical Aesthetics Practitioner — Mezitli / Mersin, Turkey
Graduate of the Near East University Faculty of Pharmacy (2010) and the Mersin University Faculty of Medicine (2017), with further training in healthcare management at Atatürk University. His combined pharmacy and medical background informs how he assesses the composition and safety of injectable products. At his clinic in Mezitli he performs botulinum toxin, dermal filler, mesotherapy, PDO thread lift and skin rejuvenation treatments, each planned individually.
These sources are provided for general information. Decisions about your own situation are made at the examination.
- Effectiveness and Safety of RHA3 vs a Comparator Product for Lip Augmentation: A Randomized, Controlled, Prospective, Multicenter Clinical Study (Aesthetic Surgery Journal, 2025)Average first and top-up volumes in the lips (upper and lower lip reported separately).
- Lip Augmentation With Saypha LIPS Lidocaine: A Postmarket, Prospective, Open-Label, Randomized Clinical Study To Evaluate Its Efficacy and Short- and Long-term Safety (Aesthetic Surgery Journal, 2024)First and top-up volumes per lip and for both lips.
- A Randomized, Controlled, Evaluator-Blinded, Multi-Center Study of Hyaluronic Acid Filler Effectiveness and Safety in Lip Fullness Augmentation (Dermatologic Surgery, 2021)Total average volume injected into the lips and the optional top-up at week 4.