Calories in Kefir (plain)

100kcal per 1 cup (243 g)

41 kcal per 100 g · about 5% of a 2,000-kcal day

Kefir is a drinkable, cultured cousin of yogurt at about 100 calories a cup. Its tang and probiotics come without much of a calorie cost.

Kefir (plain) nutrition facts

NutrientPer 100 gPer 1 cup
Calories41 kcal100 kcal
Protein3.3 g8 g
Carbs4.8 g11.7 g
Fat1 g2.4 g
Fiber0 g0 g
Sugar4.8 g11.7 g

Where the calories come from

Kefir (plain) calories by serving size

ServingCaloriesProteinCarbsFat
1 oz (28 g)12 kcal0.9 g1.4 g0.3 g
50 g21 kcal1.7 g2.4 g0.5 g
100 g41 kcal3.3 g4.8 g1 g
200 g82 kcal6.6 g9.6 g2 g
1 cup (243 g)100 kcal8 g11.7 g2.4 g
250 g103 kcal8.3 g12 g2.5 g

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Values based on USDA FoodData Central reference entries. Actual nutrition varies with variety, preparation, and portion. © 2026 NibbleCal.