get FermentCalc

Beer Calorie Calculator

Enter the original and final gravity of a beer plus your serving size to get calories per serving, calories per 100 ml, carbohydrates and alcohol by volume.

SG
SG
ml

A US can or bottle is 355 ml, a pint is 473 ml, a half-liter bottle is 500 ml. Calories scale exactly with the volume you enter.

Results

Calories in this serving
150kcal
= 42.2 kcal per 100 ml
Alcohol by volume
4.99%
Carbohydrates
3.8 g/100 ml
Calories per 100 ml
42.2

How to use the beer calorie calculator

  1. Take the original gravity from your recipe or measurement.
  2. Take the final gravity once fermentation has finished.
  3. Enter the serving size you actually drink.
  4. Read calories for the serving and per 100 ml for comparisons.

Calories come from two sources: alcohol and residual extract. The calculator converts both gravities to degrees Plato, derives real extract and alcohol by weight with the Balling balance, then applies the standard energy factors of 6.9 kcal per gram of alcohol and 3.87 per gram of carbohydrate. Because alcohol carries about 7 kcal per gram while sugar carries about 4, a dry strong beer can out-calorie a sweet light one.

kcal/100 g = 6.9 × ABW + 3.87 × (RE - 0.5); kcal/serving = kcal/100 ml × ml / 100

Calories depend entirely on the two gravity readings, so measure them carefully: correct warm or cold samples with the hydrometer temperature correction tool, and check the alcohol strength with the ABV calculator.

Frequently asked questions

How accurate are gravity-based calorie estimates?

Very - breweries compute label values from the same gravity measurements, using laboratory energy factors. Small differences come from unmeasured dextrins and proteins, so treat the result as within a few percent rather than exact, and remember attenuation affects both alcohol and carbs at once.

Why does a dry beer still have calories?

Even at 1.000, beer holds alcohol, and alcohol carries about 7 kcal per gram - more than sugar. Fermentation converts low-calorie sugar into higher-calorie alcohol, which is why a fully attenuated 5 percent beer still lands near 150 kcal per 500 ml despite tasting dry.

Do light beers simply have fewer carbs?

Mostly fewer calories from both sources: light beers start with less extract, so they make less alcohol and leave less carbohydrate. The calculator shows both numbers separately, so you can see whether a beer is light because it is small, dry, or both.