Wondering how many calories are in that slice of cantaloupe you just cut? This calculator gives you a precise estimate based on the weight of your slice, the size of the whole melon, and how you cut it. Whether you're tracking calories, planning a fruit salad, or just curious about your snack, this tool takes the guesswork out of portion control.
Simply enter the weight of your slice (or the whole melon and number of slices), choose your preferred unit, and hit calculate. You'll get the calorie count for your slice, plus a breakdown of carbs, sugar, and fiber. Perfect for anyone following a calorie-conscious diet, meal prepping, or managing their daily intake.
🍈 Cantaloupe Calorie Calculator
How to Use This Tool
Start by entering the weight of your cantaloupe slice in grams or ounces. If you don't have a scale, you can instead enter the whole melon's weight and the number of slices you plan to cut — the calculator will divide the total weight evenly. Choose your cut style: a wedge with rind includes the inedible rind, so the calculator applies an edible factor of 65% to estimate the flesh you actually eat. Cubes are assumed to be 100% edible. Then click Calculate to see the calorie count and a full macronutrient breakdown.
For quick estimates, use the preset buttons (100 g, 150 g, 200 g, 5 oz) to fill in a typical slice weight. The reset button clears all fields and returns the slice count to 8.
How It Works
The calorie calculation is based on USDA FoodData Central values for raw cantaloupe (Cucumis melo). Per 100 grams of edible flesh, cantaloupe contains approximately:
- 34 calories
- 8.16 g carbohydrates
- 7.86 g sugar
- 0.9 g fiber
- 0.84 g protein
- 0.19 g fat
When you select wedge (with rind), the calculator multiplies the total slice weight by 0.65 to account for the rind and seeds, which are not eaten. This factor is a reasonable average; actual edible yield can vary from 55% to 75% depending on how thick you cut the rind and how much flesh you leave behind.
The formula used is: Calories = (edible weight in grams ÷ 100) × 34. The same logic applies to carbs, sugar, fiber, protein, and fat.
Worked Examples
Example 1: You weigh a cantaloupe wedge and it comes to 200 g. With the wedge setting, edible weight = 200 × 0.65 = 130 g. Calories = (130 ÷ 100) × 34 = 44.2 kcal. Carbs = 10.6 g, sugar = 10.2 g, fiber = 1.2 g.
Example 2: You have a whole melon weighing 1.5 kg (1500 g) and cut it into 8 slices. Each slice weighs 187.5 g. As a wedge, edible portion = 187.5 × 0.65 = 121.9 g, giving about 41 kcal per slice.
Example 3: You prepare a fruit salad with 150 g of cantaloupe cubes. Since cubes are 100% edible, calories = (150 ÷ 100) × 34 = 51 kcal.
Tips & Best Practices
- For the most accurate count, always weigh your slice after cutting, not before. The rind can add significant weight.
- If you're tracking macros, remember that cantaloupe is mostly water and natural sugars — it's low in calories but can add up if you eat a large bowl.
- Use a kitchen scale for precision; volume measurements (like cups) are less reliable for fruit.
- When using the whole-melon method, try to cut slices of equal thickness so the per-slice estimate is accurate.
Factors Affecting Accuracy
The edible factor of 65% is an average. If you cut thick wedges with a lot of rind, the actual edible portion may be lower, making your calorie estimate slightly high. Conversely, if you scoop out the flesh close to the rind, you might eat more than 65%, making the estimate low. Melon variety and ripeness can also affect sugar content — riper melons tend to be slightly higher in sugar and calories, though the difference is small.
For precise tracking, weigh the flesh alone after removing the rind. This eliminates the need for an edible factor and gives you the most accurate number.
Frequently Asked Questions
Is cantaloupe good for weight loss? Yes, cantaloupe is low in calories and high in water and fiber, which can help you feel full. A typical slice has only about 40–50 calories, making it a great snack for calorie-controlled diets.
How many calories are in a whole cantaloupe? A medium cantaloupe (about 1.5 kg) yields roughly 500–600 calories of edible flesh, depending on the exact weight and how much rind is discarded.
Does the cut style really matter? Yes. A wedge with rind includes inedible parts, so the calorie density per gram is lower. Cubes are pure flesh, so they have more calories per gram. This calculator accounts for that difference.
Can I use this for other melons? The values are specific to cantaloupe. Watermelon and honeydew have different nutritional profiles, so use a dedicated calculator for those.
For more fruit nutrition tools, check out our watermelon calorie calculator or the grape calorie calculator.