Calories in Radishes: Nutrition Facts & Serving Sizes
Per 1 medium (3/4" to 1" dia) (5g)
Per 100g
Source: USDA FoodData Central, SR Legacy, March 2026.
Radishes contain just 16 calories per 100g, making them one of the lowest-calorie vegetables you can eat. A full cup of sliced radishes (116g) has only about 19 calories, with 0.8g protein, 3.9g carbs, and 0.1g fat. They're almost entirely water, so they add serious crunch and volume to meals without touching your calorie budget. Radishes deliver 14.8mg of vitamin C per 100g, covering a meaningful portion of your daily needs. They also provide 233mg of potassium and 25mcg of folate. With 1.6g of fiber per 100g and virtually zero fat, radishes are a go-to veggie for anyone cutting calories without cutting volume. They work raw in salads, sliced into tacos, or eaten whole as a snack.
Nutrition Highlights
Calories by Serving Size
| Serving | Cal | Protein | Carbs | Fat | Fiber |
|---|---|---|---|---|---|
| 1 medium (3/4" to 1" dia) (5g) | 0.7 | 0g | 0.2g | 0g | 0.1g |
| 1 small (2g) | 0.3 | 0g | 0.1g | 0g | 0g |
| 1 cup slices (116g) | 18.6 | 0.8g | 3.9g | 0.1g | 1.9g |
| 0.5 cup slices (58g) | 9.3 | 0.4g | 2g | 0.1g | 0.9g |
| 1 slice (1g) | 0.2 | 0g | 0g | 0g | 0g |
| 1 large (1" to 1-1/4" dia) (9g) | 1.4 | 0.1g | 0.3g | 0g | 0.1g |
| 100g | 16 | 0.7g | 3.4g | 0.1g | 1.6g |
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Full Nutrition Facts (per 100g)
| Nutrient | Amount | % Daily Value |
|---|---|---|
| Calories | 16 | 1% |
| Protein | 0.7g | 1% |
| Total Fat | 0.1g | |
| Total Carbohydrates | 3.4g | 1% |
| Dietary Fiber | 1.6g | 6% |
| Sugars | 1.9g | 4% |
| Sodium | 39mg | 2% |
Vitamins & Minerals (per 100g)
| Nutrient | Amount | % Daily Value |
|---|---|---|
| Calcium | 25mg | 2% |
| Iron | 0.3mg | 2% |
| Potassium | 233mg | 5% |
| Vitamin C | 14.8mg | 16% |
| Vitamin B6 | 0.1mg | 6% |
| Magnesium | 10mg | 2% |
| Phosphorus | 20mg | 2% |
| Zinc | 0.3mg | 3% |
| Selenium | 0.6mcg | 1% |
| Folate | 25mcg | 6% |
| Niacin (B3) | 0.3mg | 2% |
% Daily Values based on a 2,000 calorie diet (FDA reference).
Health Benefits of Radishes
Radishes are an extremely low-calorie, high-water vegetable that fits perfectly into any fat-loss diet. At just 16 calories per 100g, you can eat a large cup of them for under 20 calories, making them one of the best volume-eating tools available.
The 14.8mg of vitamin C per 100g supports immune function and collagen synthesis, both relevant during periods of intense training when recovery matters. Vitamin C also enhances iron absorption from plant-based foods, which is useful if your diet skews toward vegetables and legumes.
With 233mg of potassium per 100g, radishes contribute to electrolyte balance, which matters for muscle function and hydration. Potassium helps counteract the effects of sodium, supporting healthy blood pressure.
Radishes contain glucosinolates, natural compounds also found in other cruciferous vegetables. Their high water content means they contribute to daily fluid intake, and their satisfying crunch makes them a smart substitute for higher-calorie snacks like chips or crackers when you're trying to stay in a deficit.
Dietary Considerations
Radishes are naturally vegan, vegetarian, gluten-free, and dairy-free. With only 3.4g of carbs per 100g and 1.9g of sugar, they are keto-friendly and fit easily into low-carb diets. Their near-zero calorie count makes them one of the top choices for any calorie-restricted or weight-loss eating plan. They contain no fat and no cholesterol. Radishes are also Whole30 compliant and paleo-friendly. No notable allergens. Because of their very low glycemic impact, they are suitable for diabetic or blood-sugar-conscious diets.
Daily Intake (100g)
100g of radish provides 1% of a 2,000-calorie diet.
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Frequently Asked Questions
How many calories in a radish?
One medium radish (about 4.5g) has less than 1 calorie. A full cup of sliced radishes (116g) has about 19 calories. Per 100g, radishes contain 16 calories.
Is radish good for weight loss?
Yes. Radishes are one of the best weight-loss vegetables because of their extremely low calorie count (16 calories per 100g), high water content, and decent fiber at 1.6g per 100g. They add volume and crunch to meals without adding meaningful calories.
How much protein in a radish?
Radishes contain 0.7g of protein per 100g. A cup of sliced radishes (116g) provides about 0.8g of protein. They are not a meaningful protein source but are excellent for low-calorie volume.
Are radishes keto-friendly?
Yes. Radishes have only 3.4g of carbs per 100g with 1.6g of fiber, giving a net carb count of about 1.8g per 100g. This makes them a solid keto and low-carb option.
Can you eat radishes raw?
Yes, radishes are commonly eaten raw. They have a crisp texture and a peppery bite. They work well sliced into salads, added to tacos, used as a dipper, or eaten whole as a snack.
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