This guide cuts through the noise and gives you a clear, factual comparison of the four most popular milk alternatives — oat, almond, soy, and coconut — across the metrics that matter most: calories, protein, fat, carbohydrates, vitamins, and suitability for different dietary goals. We also cover how they compare to regular dairy milk and address common questions about specific brands, sweetened versus unsweetened varieties, and use cases like weight loss and high protein intake.
Why People Switch to Milk Alternatives
People choose milk alternatives for a wide variety of reasons. Lactose intolerance affects a significant proportion of the global adult population, making dairy milk uncomfortable or unusable for many. Veganism and plant-based diets exclude all animal products including dairy. Some people choose milk alternatives for environmental reasons — plant-based milks generally have a lower carbon and water footprint than dairy milk, though the differences between plant milks vary considerably. Others simply prefer the taste or are looking to reduce calories.Whatever your reason, understanding the nutritional trade-offs between options is important. Dairy milk is a nutritionally complete food that provides protein, fat, calcium, and B vitamins in a balanced package. Most plant-based alternatives do not match dairy milk's nutritional profile without fortification, and some fall well short on key nutrients like protein and calcium.
Nutritional Overview: Milk Alternatives at a Glance
The following figures are per 240ml (one cup) serving, unsweetened:| Milk Type | Calories | Protein | Fat | Carbs |
|---|---|---|---|---|
| Whole Dairy Milk | 149 | 8g | 8g | 12g |
| Oat Milk | 120 | 3g | 5g | 16g |
| Almond Milk | 30 | 1g | 3g | 1g |
| Soy Milk | 80 | 7g | 4g | 4g |
| Coconut Milk (carton) | 45 | 0g | 4g | 2g |
Oat Milk
Oat milk has become the most popular milk alternative in many markets, largely due to its creamy texture and mild, slightly sweet flavour that works well in coffee. It is made by blending oats with water and straining out the solids. Nutritionally it is the highest in carbohydrates of the plant milks — around 16g per cup — and relatively low in protein at about 3g per cup. It is a good source of beta-glucan fibre and is often fortified with calcium, vitamin D, and B12.Oat milk is not suitable for people with gluten intolerance or coeliac disease unless specifically labelled gluten-free, as oats can be contaminated with gluten during processing. It is naturally higher in calories than almond or coconut milk but lower than dairy.
Almond Milk
Almond milk is the lowest-calorie of the main milk alternatives at around 30 calories per cup unsweetened — significantly less than oat milk or soy milk. It is made from ground almonds and water, and is naturally low in protein (around 1g per cup) and carbohydrates. It has a light, slightly nutty flavour that works well in smoothies, cereal, and light cooking.The main limitation of almond milk is its very low protein content. If you are replacing dairy milk primarily for its protein contribution to your diet, almond milk is not an adequate substitute without compensating elsewhere. It is also worth noting that commercial almond milk contains very little actual almond — typically 2% or less — making it mostly water with added vitamins.
Soy Milk
Soy milk is the milk alternative that most closely matches dairy milk's nutritional profile. It provides around 7g of protein per cup — far more than oat, almond, or coconut milk — and is the only plant-based milk that provides complete protein containing all essential amino acids in meaningful amounts. It is also a good source of potassium and is frequently fortified with calcium and vitamin D.Soy milk has faced some controversy around phytoestrogens — plant compounds that weakly mimic oestrogen — but the current scientific consensus is that moderate soy consumption is safe and even beneficial for most people. It remains the nutritionally strongest plant-based dairy alternative for anyone switching from cow's milk.
Coconut Milk
It is important to distinguish between two very different products both called coconut milk. Canned coconut milk is a thick, high-fat product used in cooking — particularly in South and Southeast Asian cuisines — and can contain 400+ calories per cup. Carton coconut milk (the kind found in the dairy aisle) is a much more diluted product at around 45 calories per cup with low protein and moderate fat. Coconut milk from a carton is what most people use as a dairy alternative for drinking and cereal.Carton coconut milk is low in calories and protein but provides medium-chain triglycerides (MCTs) from its fat content. It has a mild coconut flavour that works well in some applications but can be noticeable in neutral-flavoured drinks.
Detailed Comparisons
For in-depth head-to-head comparisons, see our detailed guides:Head-to-Head:
- Oat Milk vs Almond Milk
- Oat Milk vs Soy Milk
- Oat Milk vs Coconut Milk
- Almond Milk vs Soy Milk
- Almond Milk vs Coconut Milk
- Soy Milk vs Coconut Milk
- Best Milk Alternative for Weight Loss
- Lowest Calorie Milk Alternative
- Highest Protein Milk Alternative
Use our Daily Calorie Needs Calculator to find your daily calorie target, and our Food Tracker to log your intake.