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Alcohol Unit Calculator

Calculate standard drinks, alcohol units, and calories in beverages.

Last updated: June 13, 2026

Calculator

Drink Type

Volume

fl oz

ABV (alcohol %)

Number of Drinks

Results

Standard Drinks (per serving)1.0

Total Standard Drinks2.0

2 drink(s)

Estimated Calories15 cal

Alcohol calories only

Pure Alcohol35.5 mL

1.2 fl oz

How to Use This Calculator

1Select your drink type.
2Enter the volume in fluid ounces.
3Enter the ABV (alcohol by volume) percentage.
4Enter the number of drinks.
5View standard drink count, total units, and estimated calories.

Formula Explanation

A US standard drink contains 0.6 fl oz of pure alcohol. Units are calculated from volume and ABV.

Standard Drinks = (Volume × ABV) ÷ 0.6

Variables:

VolumeDrink volume in fluid ounces

ABVAlcohol by volume as a decimal

0.6Fluid ounces of pure alcohol in one US standard drink

Worked Examples

12 oz Beer at 5% ABV

1. Standard drinks = (12 × 0.05) ÷ 0.6 = 1.0

Result: 1.0 standard drinks per beer

Why Use This Calculator

Track your consumption against health guidelines.
Understand the true alcohol content of different drinks.
Calorie counting for alcohol — often overlooked in diets.
Works for any beverage including custom cocktails.

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Tips & Best Practices

Craft beers often have 7-12% ABV — significantly more than standard 5%.
Restaurant pours of wine (6 oz at 14%) equal about 1.4 standard drinks.
Mixed drinks at bars often contain 1.5-2 standard drinks each.

Common Mistakes to Avoid

❌ Assuming one glass equals one standard drink.

✅ A standard drink is 12 oz beer (5%), 5 oz wine (12%), or 1.5 oz spirits (40%). Many servings exceed these.

❌ Ignoring the calories in alcohol.

✅ Alcohol has 7 calories per gram — nearly as much as fat. A single beer can be 150+ calories.

Frequently Asked Questions

How many standard drinks per week is considered moderate?

The CDC defines moderate drinking as up to 1 drink per day for women and up to 2 drinks per day for men. This is about 7 and 14 standard drinks per week, respectively.

How many calories are in alcohol?

Pure alcohol has 7 calories per gram. A 12 oz regular beer is about 150 calories, a 5 oz glass of wine is about 125 calories, and a 1.5 oz shot of spirits is about 100 calories.

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Embed This Calculator

Add the Alcohol Unit Calculator to your website for free. Copy the code below and paste it into your HTML.

Width

Height

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Disclaimer: This calculator is provided for informational and educational purposes only. Results are estimates and should not be used as a substitute for professional advice. RediCalc.com makes no guarantees regarding the accuracy, completeness, or suitability of any calculations. Always consult a qualified professional before making financial, health, construction, or other important decisions.

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