Is simple syrup keto?

Simple syrup

Not keto No — simple syrup is not keto-friendly.

Equal parts sugar and water — about 10 g net carbs per half ounce, and many cocktails and sweetened iced coffees use one to two ounces. Sugar-free syrups made with allulose or sucralose mix in the same way.

Nutrition per serving

½ fl oz · 19 g
Net carbs
9.5g
Calories
37kcal
Protein
0g
Fat
0g
Total carbs
9.5 g
Fiber
0 g
One serving vs. a 20 g daily net-carb limit 48%

About 10 g of simple syrup adds up to 5 g net carbs — about 53% of a typical serving.

Nutrition facts for simple syrup
NutrientPer servingPer 100 g
Calories37 kcal194 kcal
Total carbohydrate9.5 g50 g
Dietary fiber0 g0 g
Net carbs9.5 g50 g
Protein0 g0 g
Fat0 g0 g

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Better keto swaps for simple syrup

Keto substitutes for honey, maple syrup & jam 4 alternatives with carb comparisons and recipes Read guide

Frequently asked questions

Is simple syrup keto?

No — simple syrup is not keto-friendly. Equal parts sugar and water — about 10 g net carbs per half ounce, and many cocktails and sweetened iced coffees use one to two ounces. Sugar-free syrups made with allulose or sucralose mix in the same way.

How many net carbs are in simple syrup?

½ fl oz (19 g) of simple syrup has about 9.5 g net carbs (9.5 g total carbs minus 0 g fiber). Per 100 g, that's 50 g net carbs.

How much simple syrup can I eat on keto?

About 10 g of simple syrup adds up to 5 g net carbs — about 53% of a typical serving. On a typical 20 g daily limit, one serving uses about 48% of your carbs.

What is a good keto substitute for simple syrup?

More sweeteners

Full sweeteners list

Source: Calculated from USDA SR Legacy granulated sugar dissolved 1:1 in water. Net carbs = total carbohydrate − fiber. Rating: Not keto — More than about 10 g net carbs per typical serving. Swap it for a low-carb alternative. How we rate foods. Last reviewed October 18, 2026.

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