Radishes are a crunchy, low-calorie vegetable that often shows up in salads, tacos, and snack plates, but their protein contribution is tiny. This calculator uses standard USDA-style food-composition values to estimate the protein in a specific serving of raw radishes, whether you measure in grams, ounces, sliced cups, or individual radishes.
Enter the serving amount, choose the radish type (red globe or daikon) or set a custom protein density, and the calculator returns protein grams, the share of a typical 50 g daily protein target, and a quick look at how many radishes would be needed to reach a larger protein goal. The tool is handy for meal planners, vegans, low-calorie snackers, and anyone tracking macronutrients who wants accurate expectations for a high-volume, low-protein vegetable.
🥕 Radish Protein Per 100g Calculator
Estimate protein from raw radishes using serving weight and variety.
How to Use This Tool
This calculator is designed to turn a real-world serving of raw radish into a protein number you can log in your food diary. In the serving column, type the quantity you ate, then choose the matching unit. The quick-fill buttons are handy when you want to start from common servings such as one medium radish, one ounce, or 100 grams.
- Unit options: grams, ounces, one cup of sliced radish (about 116 g), or one medium radish (about 4.6 g).
- Radish type: raw red globe radish (0.68 g protein per 100 g) and raw daikon (0.60 g per 100 g).
- Custom density: choose “Custom” if you are working from a nutrition label or a different vegetable and want to use your own value.
- Daily reference: the default 50 g daily protein target works for many adults, but you can change it to your personal target.
Click “Calculate Protein” to see the protein grams and a short breakdown. Press Reset to restore the default example and clear the result.
How the Calculation Works
The math is simple: convert the serving to grams, then multiply by the protein density and divide by 100. The formula is:
Protein (g) = serving weight (g) × protein per 100 g ÷ 100
For example, a 150 g handful of red radish slices contains:
150 g × 0.68 g/100 g ÷ 100 = 1.02 g protein
If you use daikon at 0.60 g/100 g, the same 150 g serving provides 0.90 g protein. That explains why radishes are considered a free vegetable on many low-carb plans: they add water, crunch, and a little color, but they contribute very little protein, carbohydrate, or fat.
Radish Protein Values by Variety
The values built into the calculator are based on typical USDA food-composition figures for raw radish and daikon. Cooked radishes can have slightly different numbers because water is lost or added during boiling and roasting. For underlying data, you can browse USDA FoodData Central.
| Variety / form | Protein per 100 g |
|---|---|
| Raw red globe radish | 0.68 g |
| Raw daikon (oriental radish) | 0.60 g |
| Boiled red radish, drained | ~0.7 g (approx) |
These are averages, not guaranteed values for every radish. A raw red radish might vary from about 0.5 to 0.9 g protein per 100 g depending on variety, growing conditions, and water content.
Real-World Use Cases
Radishes are best used for volume, crunch, and spicy bite rather than as a protein source. For someone eating a 50 g protein day, a 100 g radish serving supplies only about 1.4% of the daily protein target. That low number is still useful in calorie tracking because it helps you plan the rest of the plate.
Meal preppers can add sliced radishes to grain bowls, tacos, and salads without worrying that they will disturb protein goals. Vegans and vegetarians who track amino acids usually need to hit protein targets with tofu, tempeh, legumes, and seeds; radishes are a contrast ingredient. If you are comparing animal-based options, the sausage protein per 100g calculator shows how a dense protein food compares with a water-rich vegetable like radish.
Dietitians also use tools like this for patient education, demonstrating that protein per 100 g is a density measure, not a portion size. A small amount of sausage or cheese can contain more protein than a whole bowl of radishes, which is a useful mental model for people learning to balance meals.
Accuracy Notes & Limitations
- USDA food-composition data are averages of lab samples, so individual radishes and brands can differ.
- The medium radish conversion of 4.6 g is an estimate; actual radishes range from roughly 3 g to 10 g depending on size and variety.
- A cup of sliced radish can weigh anywhere from about 90 g to 130 g depending on how thick or thin you slice. The calculator uses 116 g as a reasonable midpoint.
- Protein digestibility is not included. Plant proteins are often less digestible than animal proteins, so the usable protein may be slightly lower than the raw nitrogen-based figure.
If you weigh radishes on a kitchen scale, use the grams setting for the most accurate result.
Frequently Asked Questions
Do radishes have protein?
Yes, but only a small amount. Raw radishes contain roughly 0.68 g protein per 100 g, which is less than 1% by weight. For comparison, chicken breast is about 31 g per 100 g and cooked lentils are about 9 g per 100 g.
How many radishes do I need for 10 g of protein?
If one medium radish weighs about 4.6 g and contains about 0.031 g protein, you would need roughly 320 radishes to get 10 g protein from them alone. The calculator shows the required total weight for this target.
Is radish protein a complete protein?
No. Like most vegetables, radish protein is limited in some essential amino acids and is present in such small quantities that it is not a practical dietary protein source. It contributes to total intake, but build meals around legumes, grains, nuts, seeds, dairy, eggs, or meat.
Do not rely on radishes to meet protein needs. They are excellent volume foods, but their protein density is far too low for muscle building or recovery.