Carbs in Watermelon Slice

How many carbs are in watermelon slice?

Watermelon Slice has 82.5g net carbs per 100g — 82.5g total carbs minus 0g fiber — plus 0g protein, 0g fat, and 325 calories. That makes watermelon slice high in net carbs and higher than the typical fruit, which averages about 17.3g net carbs per 100g. At this carb count, watermelon slice is best limited to small portions on keto (usually 20–50g net carbs per day). Values are per per 100 g, sourced from Open Food Facts; net carbs are computed by CarbMeNot.

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Last updated June 10, 2026 · Reviewed by Jordan Lee, Nutrition Editor

Watermelon Slice
82.5g
Net carbs
82.5g
Total carbs
0g
Fiber
0g
Protein
0g
Fat
325
Calories

Values per 100 g.

Is watermelon slice keto-friendly?

Not really

Watermelon Slice is generally not keto-friendly. It has 82.5g net carbs per 100g (82.5g total carbs − 0g fiber). On a standard keto diet (20–50g net carbs per day), even one serving uses a large share of your daily carbs, so keep portions small or save it for a higher-carb day.

Carbs by serving size

ServingNet carbsTotal carbsCalories
100 g (3.5 oz)82.5g82.5g325
1 oz (28 g)23.1g23.1g91

How many calories are in watermelon slice?

Watermelon Slice has 325 calories per 100g. That's alongside 0g protein, 0g fat, and 82.5g net carbs per 100g.

Nutrition facts

NutrientAmount (per 100 g)
Calories325
Total carbs82.5g
Net carbs82.5g
Fiber0g
Sugar55g
Sugar alcohols0g
Protein0g
Fat0g
Sodium125mg
Potassium0mg

Source: Open Food Facts (Brach's Ferrara Candy Company). Net carbs = total carbs − fiber − sugar alcohols, computed by CarbMeNot.

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Frequently asked questions

How many carbs are in watermelon slice?
Watermelon Slice has 82.5g of total carbs and 82.5g of net carbs per 100 grams.
How many net carbs are in watermelon slice?
Watermelon Slice has 82.5g of net carbs per 100 grams (total carbs 82.5g minus 0g fiber).
Is watermelon slice keto-friendly?
Watermelon Slice is generally not keto-friendly. It has 82.5g net carbs per 100g (82.5g total carbs − 0g fiber). On a standard keto diet (20–50g net carbs per day), even one serving uses a large share of your daily carbs, so keep portions small or save it for a higher-carb day.
How many calories are in watermelon slice?
Watermelon Slice has 325 calories per 100 grams.

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CarbMeNot provides general nutrition information, not medical advice. Values are estimates — verify before relying on them for any health decision. See our Medical Disclaimer.