Use in Moderation
Watermelon
11.00g net carbs per 1 cup
Sliced fresh, a single cup carries 11 g net carbs, which can eat up a big chunk of a strict keto budget in one sitting. Keep it to a few small cubes as an occasional treat rather than a daily habit.
Built by Barron Hansen · Last updated July 2026
Nutrition Facts
Fits My Daily Budget?
Set your daily net carb limit to see how one serving fits.
One serving uses 55% of your 20g daily budget.
Plan the rest of your day
Good to Know
Almost all of the carbs here come from sugar, since fiber is only 0.6 g per cup, so there is little to offset the count. Watch pre-cut watermelon cups and snack packs at gas stations or grocery delis, which often pile on much more than one cup. Skip anything tossed with tajin, chamoy, or a sugar glaze, and steer clear of watermelon juice or agua fresca, where the sugars concentrate fast.
Is Watermelon Keto? The Full Answer
Watermelon contains 11.00g net carbs per 1 cup (11.60g total carbs minus 0.60g fiber). Sliced fresh, a single cup carries 11 g net carbs, which can eat up a big chunk of a strict keto budget in one sitting. Keep it to a few small cubes as an occasional treat rather than a daily habit.
On a standard ketogenic diet, most people target 20-25g net carbs per day. A single serving uses 55% of a 20g daily carb limit. Track your portions carefully and account for other carbs in your meals.
Better Keto Swaps
Cubed cucumber gives you that same cool, watery crunch for about 2 g net carbs per half cup, and a pinch of salt or chili makes it snackable. If you want sweetness, a handful of raspberries lands around 3 g net carbs per half cup while bringing real fiber to the table. Chilled honeydew (no, not a free pass) still beats this melon at roughly 7 g net carbs per half cup, so a small portion satisfies the fruit craving without spiking your day.
Track Your Ketone Levels
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