Honeydew is a refreshing summer melon that tastes sweet, but those sugars add up quickly. This honeydew carbs calculator tells you exactly how many carbohydrates are in the amount you plan to eat — whether you weigh it in grams, measure cups of cubed fruit, or grab a single slice. It reports total carbs, net carbs, fiber, sugar, and calories, so you can log a portion with confidence.
Use it for meal prep, macro tracking, keto counting, or blood sugar management. Honeydew's carbs come mainly from sugar, so net carbs are only slightly lower than total carbs. Switching the carb display between total and net shows the number that matters most for ketosis and glucose response. Quick preset buttons make common serving sizes instant.
No math needed — just enter your amount and read the numbers.
🧮 Honeydew Carb Calculator
How to Use This Tool
Choose the unit that matches how you are measuring honeydew — grams, ounces, cups of cubed fruit, or slices — type the amount, and press Calculate. The result panel then shows total carbs, net carbs, fiber, sugar, and calories for your exact portion. If you track net carbs for keto or blood sugar management, switch the carb display dropdown to "Net carbs" before calculating so the highlighted number is the one you actually log.
The quick-pick preset buttons jump straight to common serving sizes: 100 g, a standard 1-cup portion (about 177 g), or a single wedge slice (about 125 g). You can still type any custom amount that matches your meal, and the Reset button clears everything for the next entry. The calculation updates every time you press Calculate, and the note under the results states the data assumption used.
How the Math Works
The calculator uses nutrition values from USDA FoodData Central for raw honeydew melon. Per 100 grams, honeydew contains about 9.09 g of total carbohydrate, 8.12 g of sugar, 0.8 g of dietary fiber, and 36 calories. To get your portion's numbers, the calculator first converts your chosen unit into grams, then applies these per-100-gram values.
The core formula is simple scaling: nutrient in portion = (portion weight in grams ÷ 100) × nutrient per 100 g. Net carbs are then total carbs minus fiber. Because honeydew's carbohydrate is almost entirely sugar, net carbs end up only slightly lower than total carbs — typical net carb totals run about 8.3 g per 100 g of fruit.
Data source: USDA FoodData Central.
Worked Examples
Honeydew Nutrition Reference
Rounded values from USDA data for quick reference. The calculator uses unrounded figures, so its output may differ by a tenth of a gram.
| Serving | Weight | Total Carbs | Fiber | Net Carbs | Sugar | Calories |
|---|---|---|---|---|---|---|
| ½ cup (cubed) | 89 g | 8.1 g | 0.7 g | 7.4 g | 7.2 g | 32 kcal |
| 100 g | 100 g | 9.1 g | 0.8 g | 8.3 g | 8.1 g | 36 kcal |
| 1 cup (cubed) | 177 g | 16.1 g | 1.4 g | 14.7 g | 14.4 g | 64 kcal |
| 1 slice (⅛ melon) | 125 g | 11.4 g | 1.0 g | 10.4 g | 10.2 g | 45 kcal |
| Whole melon (edible) | ≈1,000 g | 90.9 g | 8.0 g | 82.9 g | 81.2 g | 360 kcal |
Factors Affecting Accuracy
Honeydew's nutritional content varies naturally with variety, ripeness, and growing conditions. A fully ripe melon can carry more sugar than an under-ripe one, and different cultivars may differ by a gram or two of carbohydrate per 100 g. The USDA figures used here are laboratory averages, so your actual fruit will rarely match them to the decimal.
Volume measurements introduce the biggest practical error. Cubes that are packed tightly weigh noticeably more than a loose scoop, and a "slice" can range from a thin wedge to a huge quarter-melon slab. For strict carb counting — say on a keto diet or when planning insulin — weigh the fruit on a kitchen scale. For relaxed daily tracking, close enough is usually fine.
Frequently Asked Questions
Is honeydew keto-friendly? Honeydew is moderately high in sugar. A 100 g portion supplies about 8.3 g of net carbs, so a small handful can fit into a low-carb day, but a generous bowl can blow past a strict 20 g carb limit. Eat it in measured amounts rather than by the bowl.
Why are net carbs lower than total carbs? Dietary fiber is not digested into glucose the way sugar and starch are, so many low-carb and keto trackers subtract fiber from total carbohydrate to estimate the carbs your body actually absorbs.
How does honeydew compare to watermelon or cantaloupe? Honeydew is sweeter per bite than watermelon and slightly higher in carbs than cantaloupe. Per 100 g, watermelon has about 7.6 g of total carbs, cantaloupe about 8.2 g, and honeydew about 9.1 g — all three are similar enough that portion size matters far more than the fruit choice.