Olive Oil for Weight Gain: A Calorie-Dense Healthy Fat
If you are looking at olive oil for weight gain, you are probably trying to add calories in a way that does not mean living on ultra-processed junk. That is a reasonable goal, and olive oil is one of the most calorie-dense whole foods you can reach for — roughly 120 calories in a single tablespoon, almost entirely from fat. Used thoughtfully, it is a simple way to add energy and nutrients to meals. But it is worth being honest about what it can and cannot do: olive oil is a food, not a supplement for any condition, and gaining weight healthily is about your overall diet, not one ingredient.
For our own oil, see our cold-pressed organic Marrakech olive oil.
The Short Answer
- Olive oil is energy-dense — around 120 calories per tablespoon — so it is an easy way to add calories without adding much volume to a meal.
- It adds those calories as monounsaturated fat, along with polyphenols and vitamin E, rather than as refined sugar or ultra-processed ingredients.
- Gaining weight requires an overall calorie surplus across your whole diet; olive oil is a useful tool within that, not a standalone solution.
- Drizzling it over already-cooked food is the simplest way to add calories while keeping the most flavour and polyphenols.
- If you are underweight or trying to gain weight for health reasons, it is worth speaking to a doctor or dietitian about a balanced approach.
- Quality matters: a fresh, cold-pressed extra virgin oil brings flavour and nutrients a refined oil cannot.
Why Olive Oil Is Useful for Adding Calories
The reason olive oil comes up in conversations about weight gain is simple arithmetic. Fat carries about nine calories per gram — more than twice the energy of protein or carbohydrate — and olive oil is almost pure fat. A single tablespoon contains roughly 120 calories, and 100 grams of olive oil contains around 884. That makes it one of the most energy-dense foods in an ordinary kitchen.
For someone struggling to eat enough — whether because of a small appetite, a fast metabolism, recovery from illness, or the demands of training — that density is genuinely useful. Adding two tablespoons of olive oil across a day's meals quietly adds around 240 calories without requiring you to eat a noticeably larger volume of food. For people who feel full quickly, adding calories rather than bulk is often the practical challenge, and a calorie-dense liquid fat solves it neatly.
It is worth saying plainly: this only helps if your overall intake exceeds what you burn. Weight gain follows a calorie surplus across the whole diet. Olive oil makes hitting that surplus easier and more pleasant, but it does not override the basic equation, and no single food does.
Calories With Something to Show for Them
Not all extra calories are equal in what else they bring. You could add 240 calories with sweets or a sugary drink, but you would be adding little beyond the energy. Olive oil adds its calories as monounsaturated fat — predominantly oleic acid — alongside polyphenol antioxidants and vitamin E. In other words, the calories arrive with nutrients rather than empty.
This matters because gaining weight well is not only about the number on the scales; it is about doing it in a way that fits a balanced diet rather than crowding it out with ultra-processed food. Olive oil pairs naturally with the kinds of meals most nutrition guidance already encourages — vegetables, legumes, whole grains, fish — which is exactly the Mediterranean pattern olive oil sits at the centre of.
The polyphenols and the fresh fatty-acid profile are also part of what distinguishes a good oil from a generic one. They degrade with heat, refining, and age, which is why a fresh, cold-pressed extra virgin oil delivers more than a refined oil chosen purely as a calorie source.
How to Use Olive Oil to Add Calories Well
The most effective way to use olive oil for adding calories is also the simplest: drizzle it over food that is already cooked. A generous pour over pasta, roasted vegetables, soup, bread, rice, or a salad adds a meaningful number of calories and a great deal of flavour, and because the oil is not heated at that point, it keeps the most of its delicate aromatic compounds and polyphenols.
A few practical ideas that add calories without much effort: stir a tablespoon into soups or stews before serving; toss cooked pasta or grains with oil rather than serving them plain; dress salads generously instead of sparingly; dip good bread; blend a spoonful into a savoury smoothie or a bowl of hummus. Each of these adds roughly 120 calories per tablespoon, and they stack up across a day without feeling like force-feeding.
Spreading the oil across several meals tends to work better than trying to take it all at once. Large amounts of fat in one sitting can sit heavily, especially on a small appetite, so a tablespoon here and there is usually more comfortable and more sustainable than a single big dose.
And this is where a genuinely good oil earns its place. If you are going to add olive oil to much of what you eat, its flavour matters — a fresh, polyphenol-rich extra virgin oil makes food more enjoyable, which makes eating enough easier. For a fuller walkthrough of what separates a quality oil from a dressed-up one, our guide to choosing a quality oil covers the criteria in detail.
Why Sidr & Stone
If you are adding olive oil to your meals regularly, the quality of that oil is worth getting right. Sidr & Stone's oil is built around the things that make an everyday oil genuinely good: cold-pressing, a single recent harvest, and minimal processing. We are honest about where the evidence is strong and where it is not, and we hold our oil to the same standard we would ask of any you might buy.
- Single-estate — one family-owned grove on the plains outside Marrakech, Morocco; no blending across origins.
- Rain-fed — no irrigation; the trees take what the season gives.
- Organically grown — no synthetic fertilisers, pesticides, or herbicides.
- Single harvest — a small, limited batch, pressed once per season.
- Cold-pressed within hours of harvest — flavour, aroma, and polyphenols preserved rather than processed out.
- Unfiltered extra virgin — minimally processed; it may show natural sediment, which is normal for a genuine unfiltered oil.
- 100% natural — a single ingredient, olive oil, nothing added.
- Dark glass with a gold label — protective packaging against the light that degrades polyphenols.
- Halal certified, with 10% of profits given to charity.
- Fulfilment in the UK, EU, and US.
We will not tell you Sidr & Stone is the best olive oil — that would be exactly the kind of flat superlative we try to avoid. What we will say is that our oil is single-estate Moroccan, rain-fed, organically grown, and cold-pressed within hours of harvest, and that the evidence of that care is in the taste, the colour, and the season's small limited batch.
Frequently Asked Questions
Is olive oil good for weight gain?
Olive oil is calorie-dense — about 120 calories per tablespoon — so it is an easy way to add energy to meals if you are trying to gain weight. It works only as part of an overall calorie surplus across your whole diet, and it adds nutrients rather than empty calories.
How many calories are in a tablespoon of olive oil?
A tablespoon of olive oil contains roughly 120 calories, almost entirely from fat. One hundred grams contains around 884 calories, which makes it one of the most energy-dense foods in an ordinary kitchen.
How much olive oil should I add to gain weight?
There is no fixed amount; it depends on your overall diet and how many calories you need. Many people find adding one to three tablespoons across the day's meals is a comfortable way to increase intake. Spreading it across meals is gentler on the appetite than a single large dose.
Does drinking olive oil help you gain weight?
Drinking it adds the same calories as using it on food, but most people find it more comfortable and more enjoyable drizzled over meals. There is no advantage to taking it neat for weight gain, and food carries flavour that plain oil does not.
Is olive oil a healthy way to gain weight?
Compared with adding calories from sugar or ultra-processed food, olive oil adds energy alongside monounsaturated fat, polyphenols, and vitamin E. It fits naturally into a balanced diet. As with any approach to weight, a varied diet matters more than any single ingredient.
Will olive oil make me gain weight if I am not trying to?
Olive oil is energy-dense, so large amounts add up. Whether you gain, lose, or maintain weight depends on your total calorie balance, not on olive oil specifically. Within a balanced diet, normal culinary amounts are simply a healthy fat.
Where can I buy a good cold-pressed olive oil?
Look for extra virgin, cold-pressed, a recent single harvest, dark glass, and transparency about origin. Sidr & Stone's single-estate Marrakech oil is cold-pressed within hours of harvest and available to pre-order, with fulfilment in the UK, EU, and US.
Is olive oil a medicine?
No. Olive oil is a food, not a medicine. It has a long traditional history — including being honoured in the Prophetic Sunnah — and a substantial body of modern research, particularly around polyphenols, cardiovascular health, and the Mediterranean diet pattern. It can be a worthwhile part of a healthy routine, but it does not cure diseases and is not a substitute for medical care. Be cautious of any olive oil marketed with specific disease-cure claims.
Final Thoughts
Olive oil for weight gain comes down to a simple, honest idea: it is a calorie-dense whole food that lets you add energy to your meals without relying on ultra-processed alternatives. Around 120 calories a tablespoon, delivered as monounsaturated fat with polyphenols and vitamin E, makes it one of the easiest and most pleasant ways to nudge your intake upward — provided your overall diet adds up to a surplus.
What it is not is a magic ingredient, and anyone selling it as one is overstating the case. Gaining weight well is about the whole diet, and if it matters for your health, it is worth doing with proper guidance. Where olive oil genuinely helps is in making that diet more calorie-dense and more enjoyable — and a fresh, well-made oil does that better than a tired or refined one.
Our cold-pressed organic Marrakech olive oil — single-estate, rain-fed, and pressed within hours of harvest — is available to pre-order now, with fulfilment in the UK, EU, and US.
Pre-Order Sidr & Stone Organic Marrakech Olive Oil — Limited First Harvest →
Disclaimer: This article describes general nutritional information about olive oil at the time of writing; it is not personalised dietary advice. Olive oil is a food, not a medicine, and is not a substitute for medical treatment of any condition. If you are underweight or have concerns about your weight or diet, consult a qualified medical professional or registered dietitian.
