Turnips are a crisp, low-calorie root vegetable that often shows up in dieter's meal plans, but their fiber impact is rarely obvious from a food label. Most nutrition databases list turnip fiber per 100 grams, while real meals use cups, ounces, or whole roots. This calculator bridges that gap: enter any serving size, choose raw or boiled turnip, and see exactly how much dietary fiber you are getting.
The tool uses USDA-based fiber values — 1.8 g per 100 g for raw turnips and about 2.0 g for boiled turnips — to convert your serving into total fiber, percent of daily value, and the grams of turnip needed to reach a daily fiber goal. The default daily target is 28 g, the FDA standard for adults on a 2,000-calorie diet, and you can adjust it to your own needs.
Whether you are tracking macros, planning a high-fiber meal, or simply curious about how much fiber a turnip side dish adds, this calculator gives a quick, clear answer in seconds.
🥬 Turnip Fiber Per 100g Calculator
Input Reference
This calculator is built around one simple idea: turnip fiber values are standardized per 100 grams, but people measure turnips in cups, ounces, or whole roots. Enter the amount you plan to eat, choose grams, ounces, or cups, and pick whether the turnip is raw or boiled. The tool converts your serving to grams, applies the correct fiber density, and then shows your total fiber plus its contribution to a daily fiber target.
- Amount — any positive number, including decimals. 75 g, 0.5 cup, or 4 oz all work.
- Preparation — raw turnips contain 1.8 g fiber per 100 g; boiled turnips contain about 2.0 g per 100 g because water loss concentrates the fiber slightly.
- Daily target — 28 g is the default used by the FDA for a 2,000-calorie diet, but you can change it to match your personal goal.
Tip: If you only know the weight of a peeled whole turnip, enter that weight in grams. A medium turnip is roughly 120–180 g, so a single side-serving often provides 2–3 g of fiber.
How the Calculation Works
The calculation uses the fiber density of the selected preparation and a two-step formula:
Serving fiber (g) = (serving weight in grams ÷ 100) × fiber per 100 g
For example, 200 g of raw turnip is (200 ÷ 100) × 1.8 = 3.6 g of dietary fiber. For boiled turnip, the same 200 g is (200 ÷ 100) × 2.0 = 4.0 g. The raw and boiled values come from the USDA FoodData Central nutrient database; both are rounded to one decimal place, which is typical for nutrition labeling.
Because the calculator converts cups and ounces into grams before applying this formula, the result is consistent no matter how you measure your serving. This becomes especially useful when you are planning meals and want to know whether a side of turnips will move you closer to your fiber target.
Turnip Fiber Quick-Reference Table
| Preparation | Fiber per 100 g | Fiber per cup | Fiber per medium turnip (~150 g) |
|---|---|---|---|
| Raw turnip | 1.8 g | 2.3 g (130 g cup) | 2.7 g |
| Boiled turnip | 2.0 g | 3.1 g (156 g cup) | 3.0 g |
| Frozen turnip, cooked | ~2.0 g | ~3.0 g | — |
These values are estimates. Actual fiber can vary with variety, growing conditions, and cooking time. If you have the nutrition label from a specific product, that label is usually more accurate for your exact item.
Worked Examples
Example 1: Raw turnip salad. You add 1 cup of raw turnip cubes to a salad. The calculator converts 1 cup to 130 g and multiplies by 1.8 g/100 g. Result: 2.34 g fiber, about 8% of a 28 g daily target.
Example 2: Boiled turnip side dish. You eat 200 g of boiled turnips with dinner. The calculator uses 2.0 g/100 g, so (200 ÷ 100) × 2.0 = 4.0 g fiber. With a 28 g target, that covers 14% of your day in one side dish.
These examples show why the tool matters beyond the per 100 g label: one serving can range from roughly 2 to 4 g depending on the amount and preparation, which can make a meaningful difference when you are counting fiber across a full day.
Pro Tips for Maximizing Turnip Fiber
- Leave the peel on when practical. A good portion of a turnip's fiber sits just below the skin; scrubbing is enough for most recipes.
- Pair turnips with other fiber-rich vegetables. Combining them with leafy greens or beans helps you reach higher daily totals without eating a huge volume.
- Roast or boil turnips in larger batches and refrigerate them; reheated turnip chunks make an easy high-fiber snack or side.
- If you are tracking fiber from other root vegetables too, the onion fiber per 100g calculator and the broccoli carbs per 100g calculator can fill out your vegetable nutrition picture.
Frequently Asked Questions
Are turnips actually a good source of fiber? They are moderate, not extremely high. At about 2 g per 100 g, turnips provide roughly 7% of a 28 g daily target per 100 g serving. They are lower in fiber than beans, lentils, or artichokes, but their low calorie load makes them useful for volume eating and meal planning.
Do boiled turnips have more fiber than raw? The fiber per 100 g increases slightly because cooking removes water and concentrates the nutrients, but the total fiber in the same number of whole turnips does not rise dramatically. The calculator's preparation selector handles this by using 1.8 for raw and 2.0 for boiled.
Can I use this calculator for mashed or roasted turnips? Yes, if you enter the cooked weight in grams. Roasted turnips lose more water than boiled, so their fiber per 100 g is often slightly higher, but the difference is not large enough to change most meal plans. For exact logging, weigh the finished dish.
What is the daily fiber target based on? The default 28 g comes from the FDA's Daily Value for fiber on nutrition labels, based on a 2,000-calorie intake. Many experts suggest more for some adults, so the field is adjustable to match your own goal.