Apples are one of the most popular fruits, but their carbohydrate content varies more than you might think. This Apple Carbs Per 100g Calculator lets you quickly work out total carbs, net carbs, fiber, and natural sugars for any serving of apple — whether you track macros, follow a low-carb or ketogenic diet, or simply want clearer serving-size information.
Choose from common varieties such as Fuji, Gala, Granny Smith, or Honeycrisp, enter your serving by grams, ounces, cups, or whole fruit, and the tool returns a full macronutrient breakdown per 100 grams. You can even enter custom values from a nutrition label. Perfect for diet planning, calorie tracking, and anyone curious about how apples fit into their daily carbohydrate budget.
The calculator uses USDA-derived reference values for raw apples with skin and adjusts them proportionally to your serving weight. Toggle “subtract fiber” to see net carbs — the carbohydrate figure most low-carb and keto trackers use.
🍎 Choose your apple
⚖️ Enter your serving
How the Calculation Works
The calculator applies a simple proportional formula: every nutrition value is expressed per 100 grams of raw apple with skin, and your serving weight is converted to a fraction of that reference. For example, if an apple variety contains 13.8 g of total carbohydrate per 100 g, a 150 g serving delivers 150 ÷ 100 × 13.8 = 20.7 g of total carbohydrate.
Total carbs (g) = (serving weight in g ÷ 100) × carbs per 100 g
Net carbs (g) = total carbs − fiber
Daily value % = total carbs ÷ 275 g × 100
The weight conversion is equally straightforward. The calculator converts ounces (1 oz = 28.35 g), medium apples (182 g per fruit), and cups of sliced apple (109 g per cup) into grams before applying the formula. Reference values are based on the USDA FoodData Central entries for raw apples with skin, which list approximately 13.8 g total carbs, 10.4 g sugars, and 2.4 g fiber per 100 g. Values vary by variety, ripeness, and growing conditions, so treat the built-in numbers as reliable averages rather than exact lab results. For packaged or branded apple slices, use the custom value option to enter the label's per-100g figures.
Reference Table: Carbs by Apple Variety
The table below shows approximate values per 100 g of edible raw apple with skin. Net carbs are calculated by subtracting fiber from total carbs.
| Variety | Total carbs (g) | Fiber (g) | Sugars (g) | Net carbs (g) |
|---|---|---|---|---|
| Generic (USDA average) | 13.8 | 2.4 | 10.4 | 11.4 |
| Fuji | 15.2 | 2.1 | 12.3 | 13.1 |
| Gala | 13.7 | 2.3 | 10.9 | 11.4 |
| Granny Smith | 13.6 | 2.8 | 9.6 | 10.8 |
| Honeycrisp | 14.5 | 2.0 | 11.9 | 12.5 |
| Red Delicious | 14.1 | 2.4 | 11.1 | 11.7 |
| Golden Delicious | 13.6 | 2.4 | 10.7 | 11.2 |
Values are rounded to one decimal place and adapted from public nutrition databases. Individual apples of the same variety can differ by 1–2 g of carbohydrate per 100 g depending on size, maturity, and orchard conditions.
Worked Examples
Example 1: Medium Gala apple (182 g)
Total carbs = 182 ÷ 100 × 13.7 = 24.9 g
Fiber = 182 ÷ 100 × 2.3 = 4.2 g
Net carbs = 24.9 − 4.2 = 20.7 g
Example 2: One cup of Fuji slices (109 g)
Total carbs = 109 ÷ 100 × 15.2 = 16.6 g
Net carbs = 16.6 − (109 ÷ 100 × 2.1) = 16.6 − 2.3 = 14.3 g
Example 3: 4 ounces of Granny Smith (113.4 g)
Total carbs = 113.4 ÷ 100 × 13.6 = 15.4 g
Net carbs = 15.4 − (113.4 ÷ 100 × 2.8) = 15.4 − 3.2 = 12.2 g
Tips for Accurate Carb Tracking
- Weigh the apple with the skin on if you're referencing USDA values, since those figures assume the skin is eaten. Peeling removes some fiber but has a relatively small effect on total carbs.
- Use a kitchen scale instead of measuring cups for the most consistent results. Cups can vary with slice thickness and how tightly the apple is packed.
- Remember that carb values can shift with ripeness: a very ripe apple tends to have slightly more sugar and softer flesh, while a firmer, tarter apple like Granny Smith often contains a bit less sugar.
- When logging in an app, check whether the entry is for “apple with skin” or “apple without skin” and match your preparation.
- If you track net carbs, turn on the subtract fiber toggle. Fiber is counted as a carbohydrate on nutrition labels but is not fully digested, so many low-carb eaters subtract it from their daily total.
Frequently Asked Questions
Are apple carbs mostly sugar?
Yes. In a typical apple, roughly 75% of the carbohydrate is naturally occurring sugar (fructose, glucose, and sucrose), and the rest is mostly fiber. A 100 g serving has about 10.4 g of sugar and 2.4 g of fiber.
What's the difference between total carbs and net carbs?
Total carbs include all carbohydrates, including fiber. Net carbs subtract fiber because fiber is not absorbed as glucose. Many low-carb and keto diets use net carbs for daily tracking, but some people prefer to count total carbs for stricter control.
Does peeling an apple change the carb count?
Peeling removes a portion of the fiber and a small amount of carbohydrate. The difference is usually around 1–2 g per 100 g, so it is minor for most people but can matter if you measure portions precisely.
Why do different varieties have different carbs?
Sugar content is influenced by genetics, ripeness, and growing conditions. Sweeter varieties such as Fuji and Honeycrisp tend to have more sugar and therefore more total carbs, while tart varieties like Granny Smith tend to be slightly lower.
Can I use this for dried apples or apple juice?
No. Dried apples are much higher in carbs per 100 g because water is removed, and juice has essentially no fiber. Use a labeled value for those products or search for a dedicated dried fruit and beverage calculator. For other fruit comparisons, the banana sugar calculator and peach net carbs calculator cover two popular alternatives.
Where do the reference values come from?
The built-in values are based on U.S. Department of Agriculture nutrition data. You can look up specific varieties and raw apple products in the USDA FoodData Central database at fdc.nal.usda.gov.