Radishes are a crisp, peppery addition to salads, crudité platters, and roasted vegetable medleys — and they're remarkably low in calories. A typical serving of raw radishes (about ½ cup sliced, or 5 medium radishes) contains only about 9–12 calories, making them a favorite for anyone tracking their daily intake. But exact numbers depend on how you measure your serving: by weight, by cup, or by individual radish.
This calculator helps you estimate the calories in any serving of raw radishes, whether you're weighing them in grams or ounces, measuring by volume, or counting individual radishes. It also breaks down the macronutrients (carbohydrates, protein, and fat) so you can log your food with confidence. Perfect for meal preppers, calorie counters, and anyone curious about the nutritional profile of this crunchy root vegetable.
🥕 Radish Serving Calculator
How to Use This Tool
Enter the amount of radishes you plan to eat, choose the unit (grams, ounces, cups, or individual radishes), and select whether they are raw or cooked. The calculator instantly estimates the calories and macronutrients based on standard USDA nutrition data. You can also use the quick-fill buttons to jump to common serving sizes like 100 g or 1 cup.
For the most accurate results, weigh your radishes on a kitchen scale. Volume measurements (cups) can vary depending on how finely you slice them, so weight is always preferred for precise tracking.
Nutritional Profile of Radishes
Radishes are over 95% water, which is why they are so low in calories. A 100-gram serving of raw radishes provides roughly 16 calories, 3.4 grams of carbohydrates (including about 1.6 grams of fiber), 0.7 grams of protein, and only 0.1 grams of fat. They are also a good source of vitamin C, providing about 14% of the Daily Value per 100 grams, along with small amounts of potassium, folate, and other micronutrients.
When cooked, radishes lose some water and their calorie density increases slightly — about 18 calories per 100 grams — but the difference is minimal. The peppery flavor comes from sulfur-containing compounds called glucosinolates, which have been studied for their potential antioxidant and anti-inflammatory properties.
How the Calculation Works
The calculator uses the following reference values (per 100 grams):
- Raw radishes: 16 kcal, 3.4 g carbs, 0.7 g protein, 0.1 g fat
- Cooked radishes: 18 kcal, 3.4 g carbs, 0.7 g protein, 0.2 g fat
To convert your input to grams, we use these approximations: 1 cup of sliced raw radishes weighs about 116 grams, and one medium radish (about 1 inch in diameter) weighs roughly 9 grams. The total calories are then calculated as (grams × calories per 100g) ÷ 100.
These values are based on data from the USDA FoodData Central, a reliable source for nutritional information.
Worked Examples
Example 1: You eat 150 grams of raw radish slices. Calories = 150 × 16 ÷ 100 = 24 kcal. Carbs = 150 × 3.4 ÷ 100 = 5.1 g. Protein = 150 × 0.7 ÷ 100 = 1.05 g. Fat = 150 × 0.1 ÷ 100 = 0.15 g.
Example 2: You have a salad with ½ cup of sliced radishes. That's about 58 grams. Calories = 58 × 16 ÷ 100 ≈ 9.3 kcal. Very low — you can add radishes liberally without worrying about your calorie budget.
Example 3: You roast 200 grams of radishes. Using the cooked values: Calories = 200 × 18 ÷ 100 = 36 kcal. Still very modest, even after cooking.
Tips for Accurate Tracking
- Weigh radishes raw before cooking, as water loss during cooking changes the weight but not the calorie content per raw gram.
- If you're logging in an app, use the "raw" entry for raw radishes and "cooked" for boiled or roasted ones.
- Remember that added oil, butter, or dressing will significantly increase the calorie count — the calculator only accounts for the radishes themselves.
- For meal prep, slice radishes and store them in water in the fridge to keep them crisp for up to a week.
Frequently Asked Questions
Are radishes good for weight loss?
Yes. Because they are extremely low in calories and high in water and fiber, radishes can help you feel full without adding many calories to your diet. They make an excellent crunchy snack alternative to chips or crackers.
Do radishes have any carbs?
Yes, but relatively few. A 100-gram serving has about 3.4 grams of carbohydrates, of which about 1.6 grams are fiber. This makes radishes a low-carb vegetable suitable for many low-carb eating plans.
Can I eat radishes on a keto diet?
Absolutely. With only about 1.8 grams of net carbs per 100 grams, radishes are one of the most keto-friendly vegetables. You can even use them as a low-carb substitute for potatoes in some recipes.
How many radishes are in a serving?
A standard serving is often considered ½ cup of sliced radishes, which is about 5 medium radishes and contains roughly 9–12 calories. But you can easily adjust based on your own portion.
Do cooked radishes have more calories?
Slightly, because cooking removes water and concentrates the nutrients. Per 100 grams, cooked radishes have about 18 calories versus 16 for raw. The difference is negligible for most people.
Related Tools
If you're tracking other vegetables, you might find the Radish Calories per 100g Calculator useful for quick per-100g estimates. For broader calorie tracking, explore our Calorie for Muscle Gain Calculator to plan your intake around fitness goals.