Calories in Vapes: Will Daily Vaping Lead to Weight Gain?
Worries about weight gain from vaping come from a misunderstanding about calories in vapes. When assessing the calories e-liquids and vapes provide and the body’s absorption mechanisms, calories from vaping and e-liquids and vapes are minimal. Weight changes are most influenced by the balance of your daily calorie intake, the overall health of your eating patterns, and possible indirect effects of nicotine on appetite and metabolism—not the calories in vapes.
What’s in vape juice?
Vape juice, also known as e-liquid, contains several main ingredients. Most brands use a combination of propylene glycol (PG), vegetable glycerin (VG), nicotine, and flavorings.
Here’s a simple breakdown of common e‑liquid ingredients, typical proportions, and calories if they were fully ingested.
| Ingredient | Typical mix (%) | kcal per gram | Notes |
| Vegetable glycerin (VG) | 20–80% | 4.32 kcal/g | Gives thick vapor. If fully eaten it has calories, but nearly none is actually absorbed when vaped. |
| Propylene glycol (PG) | 20–80% | ~3.5–4 kcal/g | Carries flavor, very volatile — most is exhaled. |
| Nicotine | 0–2% (0–50 mg/mL) | ~0 kcal | Present in tiny amounts; caloric contribution is negligible. |
| Flavorings & additives | 0–5% | Varies, but very small | Usually trace amounts; calorie impact is negligible. |
Example estimate
- Suppose you vape 3 mL of e‑liquid per day, VG:PG = 70:30, and density ~1 g/mL.
- VG ≈ 2.1 g → 2.1 × 4.32 ≈ 9.1 kcal (if fully absorbed)
- PG ≈ 0.9 g → 0.9 × ~4 ≈ 3.6 kcal
- Total if fully absorbed ≈ 12.7 kcal
Vaping contributes almost no calories to your daily intake. Even extremely heavy vapers, who use several milliliters of vape juice every day, take in far fewer calories than they would in a cookie, a small bag of chips, or a sugary drink. It can be said, quite safely, that it will have no impact on the energy balance in your body.
To illustrate, average energy requirements range from 1,600–3,000 kcal for adults daily, depending on age, sex, and activity level. Overall, the calories contained in e-liquids will be inconsequential, practically a rounding error, in these daily requirements and will have no influence on body weight.
Nicotine and metabolism
- Effects on appetite: Nicotine tends to suppress appetite for short periods. People who stop smoking tend to gain some weight and attribute it to loss of nicotine’s appetite suppression, and eating more. For those who continue to use nicotine through vaping, it helps to keep appetite lower, but this varies individually.
- Effects on metabolism: Nicotine has the capacity to increase resting metabolic rate (BMR) for a short period of time due to the small increase in energy expenditure which will be brought about by sympathetic nervous system stimulation. This will be a short-lived effect and will not assist in healthy weight maintenance, and will not be in any way a realistic weight control strategy.
- Rebound and substitution behaviors: People who cut down on or stop using nicotine may fill the hand to mouth or oral fixation with food, which can also contribute to weight gain. This weight gain will not be due to the calories contained in the vape juice, but from behavior substitution.
Tips for people watching their weight
- Don’t worry about the tiny calories in vape juice; focus on total dietary calories and obvious sources like snacks and sugary drinks.
- If you’re using vaping to help curb short-term appetite, try varying flavors — different flavors can provide oral satisfaction and reduce the urge to eat.
- To avoid swapping vaping for high-calorie snacks, keep healthy options on hand (fruit, vegetables, low-fat yogurt) and use low or no-calorie oral substitutes (sugar-free gum, flavored toothpicks).
- If your goal is weight loss, prioritize calorie control and increased physical activity rather than changing vaping behavior as your main tool.
Summary
In short, the core conclusion about vape calories is clear: the absorbable calories in vapes are negligible. Vaping does not meaningfully increase daily calorie intake and is not a direct cause of notable weight gain. I hope this explanation helps clear up the misconception that “vaping directly makes you gain weight” and gives you a clearer, more practical way to manage vaping alongside weight goals.
FAQ
Q1: Does vaping when hungry mean the body will metabolize e-liquid calories faster than burning fat?
A: The body metabolizing fat is a stronger energy source when the body is hungry than the very small calories from e-cigarettes would trigger the body to alter this ‘priority use’. The body would breakdown fat for energy regardless of the e-cigarettes and fat loss is achievable while vaping.
Q2: Does ‘sweet nicotine’ have sugar?
A: It all depends on the ‘source of sweetness’. Nicotine is not sugar and does not turn to sugar in the body. The ‘sweetness’ in ‘sweet nicotine’ is from ‘sweeteners’ and ‘sweet flavorings’ added to the e-liquid.
Q3: Do e-cigarettes that heat to higher temperatures release more heat that the body absorbs?
A: No. Higher temperatures do not result in the body absorbing heat, but there is an increase in the efficiency of e-liquid vaporization.