Beer Calorie Calculator

How it is calculated

The estimate adds an alcohol part and a leftover-sugar part. With serving size oz in US fluid ounces, ABV in percent and original gravity OG written as 1.050:

alcohol = oz × 29.5735 mL × ABV/100 × 0.789 g/mL × 7 kcal/g (about oz × 1.633 × ABV)
residual points = max(0, (OG − 1.000) × 1000 − 7.5 × ABV)
carbs = oz × 0.4 × residual points
total = round(alcohol + carbs)

The residual-points line assumes stronger beers ferment out more of the wort sugar, and it is floored at zero, so a strong, fully fermented beer has no carbohydrate part. If serving or OG is left empty they default to 12 oz and 1.050; ABV is required. A serving of zero or less, an ABV that is negative or above 70%, or an OG outside 1.000–1.200 gives no result. Results are rounded to whole kcal and are rough estimates, not label values.

Common mistakes

• Entering ABV as a fraction (0.05) instead of a percent (5). With 0.05 the alcohol part falls to about 1 kcal, while the default OG still adds 238 kcal of carbohydrate, so the total looks plausible but is wrong.
• Typing the serving in millilitres. The field is in US fluid ounces, so a 330 ml bottle is about 11.2 oz and a 500 ml pint about 16.9 oz.
• Writing OG as 1050 or 50 instead of 1.050. Only specific gravities from 1.000 to 1.200 are accepted, so 1050 or 50 shows no result instead of a figure of millions of kcal.
• Using the final gravity instead of the original gravity. The formula already estimates the leftover sugar from OG and ABV.
• Expecting the carbohydrate part to appear in every beer. For a 9% ABV beer with OG 1.060 the residual points drop to zero, so the 176 kcal is alcohol only.