Calories in soy milk (soya milk)

Original, with added calcium and vitamins A and D. 43 kcal (180 kJ) per 100 g. Choose a portion below and every figure on the page updates.

Soy milk, called soya milk in the UK, is a plant-based drink made from soybeans and water. This original, fortified version has 43 kcal (180 kJ) per 100 g, with its energy spread across carbohydrate, fat and protein. Its protein, about 2.6 g per 100 g, is much higher than in oat or almond milk, and fortification adds calcium, vitamin D and vitamin B12.

Where the energy comes from

Share of total energy contributed by each macronutrient, using the standard 4/4/9 kcal per gram factors:

Things worth knowing

• A cup (240 ml) has about 104 kcal (437 kJ) and 6.3 g of protein. A 30 ml splash in coffee adds about 13 kcal (55 kJ).
• Original and vanilla soy milks are lightly sweetened, with about 3.7 g of sugars per 100 g. Unsweetened soy milk has about 38 kcal per 100 g and only around 1.3 g of carbohydrate.
• Compared with oat milk (about 45 kcal and 0.7 g of protein per 100 g), soy milk has similar energy but nearly four times the protein. Whole cow's milk has about 3.3 g of protein and 61 kcal.
• A fortified cup supplies about 300 mg of calcium (23% DV) and 2.1 µg of vitamin B12 (86% DV). Unfortified brands contain far less, so check the label.

Converting these figures

One 1 cup (240 ml) of soy milk is 104 kcal, which is 437 kJ. To convert any other figure, divide kilojoules by 4.184 for calories, or use the converter on the home page.

It takes 556 g of soy milk to reach 1,000 kJ (239 kcal). See how that compares with other foods on the 1000 kJ to calories page.