Carbohydrates are the main energy source in fruit, but the amount varies widely from watermelon to banana. This fruit carbs per 100g calculator lets you quickly estimate total carbohydrates, dietary fiber, and net carbs for a serving of popular fresh fruits. Values are based on standard USDA reference data, so you get reliable numbers for meal planning.
Nutrition students, dietitians, low-carb dieters, and anyone tracking macros can use this tool to portion fruit accurately without guesswork. Just pick a fruit, enter a weight in grams, and the calculator handles the per-100g math for you. Keep the net carbs toggle on if you're following a keto or low-carb plan, or use the full breakdown to hit your daily fiber goals.
🍎 Fruit Carbs per 100g Calculator
Estimate total carbs, fiber, and net carbs for a serving of fresh fruit.
How to Use This Tool
This calculator is designed for quick, realistic carb counting. Follow these steps:
- Select a fruit from the dropdown. The list covers common fresh fruits with values per 100 g of edible portion.
- Enter the amount in grams. A kitchen scale gives the most accurate result. If you don't have one, estimate from volume: one cup of sliced fruit is usually 120–180 g depending on the fruit.
- Decide whether to show net carbs. Net carbs subtract fiber, which your body doesn't fully digest the way it digests sugars and starch.
- Click Calculate to see total carbs, fiber, and net carbs for your exact serving.
How Carb Values Are Calculated
Carbohydrate values in this calculator come from USDA FoodData Central standard reference averages. For each fruit, we store two numbers per 100 grams: total carbohydrate and dietary fiber. When you enter a serving weight, the tool scales them using:
Carbs in serving = (grams per 100g ÷ 100) × serving weight
Total carbohydrate includes sugars, starch, and fiber. Net carbs subtract dietary fiber because fiber is not digested into glucose in the same way. This matters for low-carb or ketogenic diet planning. Since fruit carbohydrate content varies by ripeness and variety, treat results as close estimates rather than lab-exact values.
Worked Examples
Example 1: Banana (120 g)
Banana has 22.8 g total carbs and 2.6 g fiber per 100 g. Multiply by 1.20 → total carbs = 27.4 g, fiber = 3.1 g, net carbs = 24.3 g.
Example 2: Strawberries (150 g)
Strawberries have 7.7 g total carbs and 2.0 g fiber per 100 g. Multiply by 1.50 → total carbs = 11.6 g, fiber = 3.0 g, net carbs = 8.6 g. A larger bowl of strawberries still has fewer carbs than one medium banana.
Carbohydrate Reference Table
Approximate values per 100 g of raw edible portion, rounded from USDA averages.
| Fruit | Total Carbs (g) | Fiber (g) | Net Carbs (g) |
|---|---|---|---|
| Apple | 13.8 | 2.4 | 11.4 |
| Banana | 22.8 | 2.6 | 20.2 |
| Blueberries | 14.5 | 2.4 | 12.1 |
| Cherries | 12.2 | 2.1 | 10.1 |
| Grapes | 17.2 | 0.9 | 16.3 |
| Kiwi | 14.7 | 3.0 | 11.7 |
| Mango | 15.0 | 1.6 | 13.4 |
| Orange | 11.8 | 2.4 | 9.4 |
| Peach | 9.5 | 1.5 | 8.0 |
| Pear | 15.2 | 3.1 | 12.1 |
| Pineapple | 13.1 | 1.4 | 11.7 |
| Raspberries | 11.9 | 6.5 | 5.4 |
| Strawberries | 7.7 | 2.0 | 5.7 |
| Watermelon | 7.6 | 0.4 | 7.2 |
Remember: these are averages. A very ripe banana may be a few grams higher; a firm, underripe one may be lower.
Tips for Accurate Carb Tracking
- Weigh fruit in the form you actually eat. For bananas, weigh the peeled fruit; for oranges, weigh the segments without peel.
- Check ripeness. Ripe fruit tends to have more sugar and slightly higher carb density than underripe fruit.
- Be consistent with net carbs. Some apps report net carbs automatically; others show total carbs only.
- Dried fruit and fruit juice are very different from fresh fruit: water removal concentrates carbs, and juice loses fiber.
- For portion estimates, one closed handful of berries is roughly 80–100 g, while a medium fruit is typically 120–180 g.
Frequently Asked Questions
Are net carbs the same as digestible carbs?
Most low-carb diets define net carbs as total carbs minus dietary fiber. Sugar alcohols, if present, are also subtracted, but fresh fruit contains no significant sugar alcohols, so total minus fiber is a good approximation.
Why do different sources show different carb numbers?
Fruit is a natural product. Soil, climate, variety, and ripeness all change sugar content. This calculator uses average USDA values; the fruit in your kitchen can differ by a few grams per 100 g.
Should I avoid fruit on a low-carb diet?
Not necessarily. Berries and melons are lower in carbs, while bananas, grapes, and mangoes are higher. For a berry-focused look, try the Raspberry Net Carbs Calculator. Use this calculator to fit fruit into your daily allowance without guesswork.