Turnips are one of the most keto-friendly root vegetables, but their total carbohydrate count can be misleading. This turnip net carbs calculator helps you separate digestible carbs from dietary fiber so you can plan meals, track macros, and stay in ketosis or hit a low-carb target with confidence.
Simply enter your portion size, choose the turnip form (raw or boiled), and optionally override the carb and fiber values with data from your own food label or nutrition app. The calculator converts grams, ounces, cups, or whole turnips, applies the standard USDA nutrition values, and returns net carbs per serving plus a step-by-step breakdown.
Whether you are following keto, managing diabetes, or just curious how many digestible carbs are in your salad or roasted side dish, this tool gives you a quick, accurate answer in seconds.
🥬 Turnip Net Carbs Calculator
Find digestible carbs in raw or boiled turnips.
1. Portion size
2. Turnip form
How to Use This Tool
Enter your serving size, then choose the matching unit: grams, ounces, chopped cups, or whole medium turnips. One cup of raw chopped turnip is treated as about 130 g, and one medium turnip as about 122 g. If you weigh food on a scale, grams give the most accurate result.
Next, pick the turnip form that matches what you weighed. The raw preset uses standard USDA figures; the boiled preset reflects the extra water absorbed during cooking. For a different label or app, tick “Use custom carb/fiber values” and enter your own per-100g numbers, then press Calculate.
The Math Behind Net Carbs
Net carbs are the carbohydrates your body actually digests. The general formula is:
Net carbs = total carbohydrates − dietary fiber − sugar alcohols
Fiber is subtracted because humans cannot fully digest it. Turnips contain no meaningful sugar alcohols, so the formula becomes:
Net carbs = total carbs − fiber
The calculator converts your serving to grams, multiplies the per-100g carb and fiber values by the portion weight, then subtracts the two. The same per-100g subtraction is shown in the results.
Reference Data: Turnip Carb Values
These representative values power the presets. Exact numbers vary slightly by variety, growing conditions, and cooking method.
| Form | Total carbs | Fiber | Net carbs |
|---|---|---|---|
| Raw turnip, per 100 g | 6.4 g | 1.8 g | 4.6 g |
| Boiled turnip, per 100 g | 4.4 g | 1.8 g | 2.6 g |
| 1 cup raw chopped turnip (≈130 g) | 8.3 g | 2.3 g | 6.0 g |
| 1 medium raw turnip (≈122 g) | 7.8 g | 2.2 g | 5.6 g |
Weights are approximate; weigh your portion when precise tracking matters.
Worked Examples
150 g raw turnip: (150 ÷ 100) × (6.4 − 1.8) = 6.9 g net carbs.
122 g boiled turnip: (122 ÷ 100) × (4.4 − 1.8) = 3.2 g net carbs.
200 g custom label (5 g carbs, 2 g fiber): (200 ÷ 100) × (5 − 2) = 6.0 g net carbs.
Common Mistakes to Avoid
Tip: Always subtract fiber — total carbs are not net carbs.
Be consistent with units: one cup and one medium turnip are not 100 g, so choose the correct unit and let the calculator convert. Mixing raw and cooked values is another easy error; boiled turnips contain more water, so their per-100g carb value is lower than raw. Use raw data only for raw weights.
Frequently Asked Questions
Are turnips keto-friendly? Yes — a 100 g raw serving has about 4.6 g net carbs, so moderate portions fit many low-carb and ketogenic meal plans.
Raw or boiled? Use the option that matches how you weighed the food. If you weighed before cooking, choose raw; if after, choose boiled.
Do I subtract all fiber? In the US, labels list fiber separately, so subtract it. In the UK and EU, labels often already exclude fiber, so no subtraction is needed.
Why do numbers vary between sources? USDA values are averages. Variety, harvest time, storage, and cooking water all affect carb and fiber content slightly. When precision matters, use the label or a lab-tested entry from your tracking app.
How much sugar is in turnips? Raw turnips contain about 3.8 g sugar per 100 g, which is included in total carbohydrates. For a sugar-only answer at any portion, use the turnip sugar per 100 g calculator.