Orange — calories & nutrition
By Jenny Updated
Oranges are one of Britain's most familiar fruits — easy to eat, naturally portioned, and genuinely good for you. A medium orange weighing around 160g contains about 62 calories, 14g of natural carbohydrates, 2.8g of fibre, and an impressive 70–90mg of vitamin C — roughly the full recommended daily adult intake in a single piece of fruit. This combination of nutrients, fibre, and hydration makes an orange one of the most satisfying low-calorie snacks available.
Despite being sweet, whole oranges have a relatively low glycaemic load because the fruit's fibre and physical structure slow the release of sugars into the bloodstream. This is a crucial distinction from orange juice, which removes the fibre and turns a healthy whole fruit into a fast-acting sugar drink. A whole orange is significantly better than a glass of orange juice from a blood sugar and satiety standpoint — the juice has fewer than half the fibre and feels like far less food.
On Slimming World, whole oranges count as both a Speed Food and a Free Food. You can eat them freely without counting Syns. This makes them excellent for breakfast alongside porridge, as an afternoon snack, or as a natural dessert after a meal. The natural sweetness of an orange can satisfy a craving for something sweet in a way that keeps you completely on-plan.
Orange nutrition breakdown
| Portion | Calories | Carbs (g) | Fat (g) | Protein (g) | Fibre (g) |
|---|---|---|---|---|---|
| 1 medium orange, ~160g | 62 | 14 | 0 | 1 | 3 |
| 100g (flesh only) | 47 | 9 | 0 | 1 | 2 |
| 1 large orange, ~200g | 78 | 18 | 0 | 2 | 4 |
How Orange compares
Calories per 100g
FAQs
How many calories are in an orange?
A medium orange weighing around 160g contains approximately 62 calories. A large orange at 200g is about 78 kcal. Per 100g of flesh, oranges provide around 47 calories. Oranges are low-calorie fruits with a high water and fibre content that makes them filling well beyond what their calorie count suggests. A clementine or mandarin is similar at around 35–45 kcal per fruit depending on size.
Is an orange a Free Food on Slimming World?
Yes — whole oranges are a Free Food and Speed Food on Slimming World. You can eat them without counting Syns as part of your Food Optimising day. This applies to all whole citrus fruit including clementines, mandarins, and satsumas. Orange juice is different — it does not count as Free on Slimming World because the juicing process removes the fibre and concentrates the sugar. Always choose whole fruit over juice for maximum satiety and on-plan compliance.
How much vitamin C is in an orange?
A medium orange (160g) provides approximately 70–90mg of vitamin C, which meets or exceeds the recommended daily intake of 40mg for UK adults set by the NHS. Vitamin C is essential for immune function, skin health, and the absorption of iron from plant-based foods. Eating an orange alongside iron-rich foods like spinach, lentils, or fortified cereals can significantly improve how much of that iron your body absorbs, making oranges particularly valuable for vegetarians and those at risk of iron deficiency.
Is eating a whole orange better than drinking orange juice?
Yes — a whole orange is considerably better than a glass of orange juice from a nutritional and weight-management perspective. A whole orange contains 2.8g of fibre that slows sugar absorption, increases satiety, and reduces the glycaemic impact. Orange juice removes most of this fibre and concentrates the natural sugars, producing a fast-absorbing drink that raises blood sugar quickly and provides little lasting fullness. On Slimming World, whole oranges are Free, while orange juice carries Syns. For health, hydration, and hunger management, always choose whole fruit.
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