How Many Calories in a Glass of Wine Explained Simply

Have you ever wondered how many calories are sitting quietly in your glass of wine? While we usually pay attention to the calories in food, drinks are often forgotten - yet the calories from wine can add up more quickly than expected. Most of these are what nutrition experts call empty calories, coming from alcohol and sugar. They provide energy but little in the way of nutritional value.

In Australia, this question has become more important as people are increasingly health-conscious and mindful of their drinking habits. Because calorie labelling isn’t required on wine bottles, it’s not always clear how much energy each glass contains. Movements such as Dry July and the growing popularity of low-alcohol and alcohol-free wines highlight how many people want to enjoy wine without derailing their health goals. At the same time, younger generations are drinking less overall, often choosing lighter styles with fewer calories.

Understanding the calorie content of wine isn’t about giving it up altogether – it’s about making informed decisions. Whether you’re watching your weight, looking after your long-term health, or simply curious, knowing what’s in your glass helps you enjoy wine as part of a balanced lifestyle.

What Decides the Calories in a Glass of Wine? (The Science)

The calories in a glass of wine come almost entirely from alcohol and sugar, with little or no contribution from fat or protein. That’s why two glasses of wine can look identical but still vary a lot in energy content. Here are the main factors:

1. Alcohol Content (ABV) 

Alcohol is the single biggest source of calories in wine. Each gram of alcohol has around 7 calories, which is nearly as much as fat (9 calories per gram) and almost twice that of protein or carbohydrates (4 calories per gram). This means wines with a higher alcohol percentage (ABV) will always contain more calories. For example, a 14% Shiraz will naturally be heavier on calories than an 11% Riesling.

2. Residual Sugar

The natural sugars left in the wine after fermentation also add calories. Sugar contributes 4 calories per gram, which explains why dry wines (with very little sugar left) tend to sit around 120–130 calories per glass, while sweet or dessert wines can jump to 160 calories or more. This is why a small glass of Port may actually carry more calories than a full glass of Sauvignon Blanc.

3. Serving Size

Calories go up as glass sizes increase. A standard 150ml pour might contain 120–140 calories, but a large 250ml restaurant glass could add 80 extra calories without you realising it.

Practical Tip: If you’re trying to keep calories in check, one of the simplest strategies is to choose a dry wine with a lower ABV and be mindful of pour size. Often it’s not the type of wine that surprises people, but how much ends up in the glass.

Calories in Different Types of Wine

The number of calories in a glass of wine depends mainly on its alcohol strength (ABV) and sugar content. On average, a standard 5-ounce (150ml) glass can range from 90 calories for a dry sparkling to more than 200 calories for fortified wines.

Here are some average calorie counts based on a 5-ounce (150ml) serving:

• Dry white wine(Sauvignon Blanc, Pinot Grigio, 9–13% ABV): About 100–120 calories
• Sweet white wine(Riesling, Moscato, 9–12% ABV): Roughly 150–180 calories
• Dry red wine(Pinot Noir, Merlot, 11–13.5% ABV): Around 115–140 calories
• Full-bodied red wine(Shiraz, Cabernet, 13.5–16% ABV): Approximately 140–165 calories
• Rosé wine: Usually 110–130 calories
• Sparkling wine(Prosecco, Brut Champagne, ~12.5% ABV): 90–130 calories, with brut/dry styles at the lower end
• Dessert wines(Sauternes, Ice Wine, 14–21% ABV): Roughly 160–230 calories
• Fortified wines(Port, Sherry, 17–20% ABV): About 200–250 calories

Practical Tip: If you’re watching your intake, go for dry whites or brut sparkling. They tend to be the lightest choices without sacrificing flavour.

Dessert wines like Port, often aged in port barrels or even personalised oak barrels, are some of the richest in sugar and calories.

For serving fortified wines, people sometimes use unique pieces like a crystal whiskey decanter or novelty designs such as a globe decanter, skull decanter, or even a gun decanter.

Calories by Serving Size 

The size of your pour is one of the biggest factors that decides how many calories you actually drink. In Australia, one standard drink equals 10 g of alcohol, but wine is often served in much larger glasses, which can double or even triple the calorie load.

Here’s what that looks like in practice for an average wine around 12–13.5% ABV:

• 100 ml(tasting size): About 70–95 calories. Roughly one standard drink.
• 150 ml(common glass): Around 100–160 calories. Equal to about 1.5 standard drinks.
• 175–250 ml(large restaurant pours): Adds 20–80 extra calories on top of a 150 ml serve, often reaching 2–3 standard drinks.
• 750 ml bottle: Roughly 500–650 calories in total, depending on the ABV and sweetness.

Why this matters: many people assume they’ve only had “a glass of wine,” but restaurant servings are often much larger than the official standard size. A single large glass can carry as many calories as a small meal, so it’s easy for intake to creep up without realising it.

Quick tip: If you’re keeping an eye on calories, ask for a 150 ml pour or measure at home. Also check the standard drinks icon on Australian labels - it’s a simple way to track both alcohol and calorie content together

Glassware plays a role too - a wine decanter or even stainless steel wine glasses can make it easier to track pours, while a whisky decanter set or Whiskey Decanter and glasses often hold larger volumes that can unintentionally increase serving size..

Do Calories in Wine Affect Weight Gain?

The short answer is yes - wine calories can affect weight gain, but the story isn’t as simple as “a glass equals fat.” It depends on how much you drink, how your body processes alcohol, and the choices you make around food.

Here are the main reasons why wine can contribute to extra weight:

1. Empty Calories 

Each gram of alcohol has about 7 calories, nearly as much as fat (9 per gram). But unlike food, wine doesn’t fill you up - these are “empty calories.” You’re adding energy to your day without the nutrients that make you feel satisfied. That makes it easy to overdo it.

2. How Your Body Burns Alcohol 

Your liver treats alcohol as a toxin, so it burns it first. This slows down how efficiently your body deals with fat and carbs from food. In practice, it means those late-night snacks you eat with wine are more likely to be stored as fat. Studies have shown that regular heavy drinking is linked to fat storage around the belly - sometimes called “wine belly” or “beer belly.” 

3. Appetite and Food Choices 

After a couple of glasses, your body craves salty, fatty, or sugary foods. Many people find themselves reaching for chips, cheese, or late-night takeaways after drinking. These extra calories stack on top of what’s in your glass, creating a calorie surplus that leads to weight gain.

4. Amount and Frequency Matter 

Australia’s National Health and Medical Research Council recommends no more than 10 standard drinks a week and no more than 4 on any one day. A small glass now and then isn’t likely to affect weight much, but consistent large pours or binge drinking add up quickly.

5. Sleep and Recovery 

Wine can interfere with your REM sleep - the deep stage that restores energy. Poor sleep makes your metabolism sluggish and drives cravings for high-calorie foods the next day, adding another indirect link between wine and weight gain.

Conclusion: Savour the Balance - Cheers with Confidence

Understanding wine calories isn’t about giving up enjoyment - it’s about making informed, balanced choices. Whether you’re sipping a delicate white or a robust shiraz, being mindful of serving size and wine type helps you enjoy your glass without the guilt.

For those who love the ritual of wine, accessories like a stylish decanter or a unique high heel decanter offer flair, but remember: it’s the amount poured - not the container - that counts. A beautiful wooden decanters box can make hosting feel special, while functional items like whisky stones gift sets or essential wine accessories can elevate your experience - just portion wisely.

If you’re looking to gift in a memorable way or make your drinks stand out,oak barrel ageing or display pieces add authenticity and elegance. Custom-engraved barrel pieces even let you celebrate special moments with personality.

Booze & Barrels makes it easy to match your wine sense with style.

Frequently Asked Questions

1. Does chilling wine change its calorie content?

No, chilling wine does not change its calorie content. Cold wine might feel lighter and more refreshing, but the calories remain the same since they come from alcohol and sugar, not temperature.

2. Is non-alcoholic wine lower in calories?

Yes. Most non-alcoholic wines contain far fewer calories because the alcohol (the biggest calorie source) is removed. However, some may have added sugars for taste, so always check the label.

3. Do organic wines have fewer calories than regular wines? 

Not necessarily. Organic wines are made without synthetic chemicals, but the calorie content still depends on the alcohol and sugar levels—just like conventional wines.

4. How many calories are in cooking wine? 

Cooking wines usually contain a similar calorie range to drinking wines, but since they’re often reduced in sauces, the concentration of both flavour and calories can be higher in the finished dish.

5. Does sparkling wine have fewer calories than still wine? 

Generally yes, especially in brut (dry) varieties, which often range from 90–120 calories per glass. However, sweeter sparkling wines like demi-sec or doux can have more calories due to added sugar.