One cup of sliced strawberries contains about 13 grams of total carbohydrates, with 3 grams of fiber and 8 grams of sugar. That makes strawberries one of the lowest-carb fruits you can eat, which is why they show up on nearly every list of keto-friendly and diabetes-friendly foods.
Carbs by Serving Size
How many carbs you’re getting depends entirely on how much you eat and how you measure. A cup of strawberry halves (about 152 grams) comes in slightly lower than sliced strawberries because the halves pack less tightly in the cup. Here’s how the numbers break down across common portions:
- 1 cup, sliced (168g): 13g total carbs, 3g fiber, 8g sugar
- 1 cup, halves (152g): 11.7g total carbs, 3g fiber
- 1 medium strawberry (about 12g): roughly 1g total carbs
A single strawberry is so low in carbs that you’d need to eat more than a dozen to reach even 13 grams. This makes portion control straightforward: you can grab a handful without worrying much about the math.
Net Carbs for Keto and Low-Carb Diets
If you’re tracking net carbs (total carbs minus fiber), one cup of strawberry halves comes to about 8.7 grams. On a standard ketogenic diet that limits you to 20 to 50 grams of net carbs per day, a full cup of strawberries fits comfortably. That’s a meaningful amount of fruit for a diet that excludes most of it.
For context, the CDC groups fruits by “carbohydrate choices,” where one choice equals 15 grams of carbs. You can eat 1¼ cups of whole strawberries before hitting that single carb choice, compared to just ¾ cup of blueberries. Strawberries give you more volume per gram of carbohydrate than almost any other fruit.
How Strawberries Compare to Other Berries
Berries as a group are the lowest-carb fruits available, but strawberries sit near the bottom of even that category. Blueberries contain roughly 21 grams of total carbs per cup, nearly double what strawberries have. Raspberries and blackberries are closer to strawberries, landing around 14 to 15 grams per cup, but strawberries still edge them out. If your goal is to eat the most fruit for the fewest carbs, strawberries are the best option in the berry family.
What Kind of Sugar Is in Strawberries
The 8 grams of sugar in a cup of sliced strawberries come from a mix of fructose, glucose, and a smaller amount of sucrose. The ratio shifts depending on the variety and how ripe the berry is. Fructose and glucose make up the majority, while sucrose content varies widely across cultivars, from as little as 1.9 grams per kilogram in some varieties to over 20 grams per kilogram in others.
This sugar profile is part of why strawberries taste sweet without spiking blood sugar as sharply as tropical fruits. The 3 grams of fiber per cup also slows digestion, which helps blunt any glucose response.
Ripeness Changes the Sugar Content
A deeply red, fully ripe strawberry doesn’t necessarily have more total sugar than a less ripe one, but the type of sugar shifts as the fruit matures. Early in development, strawberries store energy as starch, which breaks down rapidly as ripening progresses. Glucose and fructose levels fluctuate throughout this process, and enzyme activity in the fruit changes which sugars dominate at each stage.
In practical terms, a riper strawberry tastes sweeter partly because of this starch-to-sugar conversion and partly because acidity drops as the fruit matures. But the total carbohydrate difference between a just-ripe berry and a very ripe one is small enough that it won’t meaningfully change your daily count. Pick the ripeness you enjoy eating.
Fitting Strawberries Into a Carb Budget
At roughly 9 net carbs per cup, strawberries work in nearly any eating pattern that involves carb tracking. For someone managing diabetes, the combination of low sugar, decent fiber, and high water content makes them one of the safest fruit choices. For someone on keto, a half-cup serving (about 4 to 5 net carbs) leaves plenty of room for other foods throughout the day.
Fresh and frozen strawberries have essentially the same carb content, as long as the frozen ones are unsweetened. Sweetened frozen strawberries or strawberries packed in syrup can double or triple the sugar count, so always check the label. Dried strawberries are a different story entirely: removing the water concentrates the sugar dramatically, pushing carbs well above what you’d get from the same weight of fresh fruit.