Calories in 1 Oz of Coffee
1 oz of coffee (28 g) has 20 calories. That is 1% of a 2,000 calorie diet.
The calories come from 0.6 g of protein, 0.4 g of fat and 3.6 g of carbohydrates, a split of 11% protein, 18% fat and 71% carbs. For comparison, 2 oz of coffee has 40 calories. Burning 20 calories takes about 4 minutes of brisk walking or 2 minutes of running for a 155 lb adult, based on Harvard Health Publishing activity estimates.
Coffee Calorie Calculator
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Coffee calories by serving size
Common amounts of coffee with calories and macros. Tap a row for its full nutrition page.
Coffee vs similar foods
Calories per 100 g compared with other drinks.
Coffee: common questions
How many calories are in 1 oz of coffee?
1 oz of coffee weighs about 28 g and has 20 calories.
How much protein is in 1 oz of coffee?
1 oz of coffee has 0.6 g of protein, which is 1% of the 50 g Daily Value.
How many carbs are in 1 oz of coffee?
1 oz of coffee has 3.6 g of carbohydrates, including 0 g of fiber and 3 g of sugars.
How much coffee is 100 calories?
100 calories of coffee is 141 g, about 4 1/2 fl oz of coffee.
More about coffee
Amount for a target
Weights and conversions
Source: USDA FoodData Central, FNDDS 2021-2023. FDC ID 2710478. Original description: Coffee, bottled/canned. Portion weights are USDA household measures.