How Much Caffeine Is Really in Your Daily Drinks?

You’ve probably wondered how much caffeine is really in your morning soda or energy drink—or whether that can of cola is keeping you up at night. Most people don’t know the actual numbers, but understanding caffeine content in everyday beverages helps you make better decisions about your daily intake.

The average adult weighing 70kg can safely consume up to 500mg of caffeine per day, with a common recommendation of 300–400mg—that’s roughly 4–6 cups of coffee. But what about other drinks? Here’s a clear breakdown of the caffeine content per 100ml in popular beverages.

Caffeine Limits: How Much Is Safe?

For a typical adult of around 70kg, daily caffeine intake should stay under 500mg. A commonly advised range is 300–400mg per day, equal to about 4–6 standard cups of coffee. Going over this may lead to sleep issues, jitters, or increased heart rate depending on your metabolism.

Caffeine in Soft Drinks

Regular and diet sodas contain varying levels of caffeine. Here’s how they compare per 100ml:

• Coca-Cola: 9.7mg
• Diet Coke: 12.7mg

These numbers mean a standard 330ml can of Coca-Cola has around 32mg of caffeine, while Diet Coke contains about 42mg per can. They’re lower than coffee but still contribute to your daily total.

Caffeine in Energy Drinks

Energy drinks often pack much higher caffeine doses, sometimes in small servings. Per 100ml caffeine levels include:

• Lift Plus: 14.5mg
• Pepsi Max: 19.4mg
• Diet Pepsi: 10.1mg
• Red Bull: 32mg
• Red Bull Energy Shot: 133.3mg

A regular 250ml can of Red Bull contains about 80mg of caffeine (32mg × 2.5), while the smaller Red Bull Energy Shot (typically 60ml) delivers a punchy 80mg (133.3mg × 0.6 ≈ 80mg)—nearly as much as a strong espresso.

Why These Numbers Matter

Knowing the caffeine content in common drinks helps you monitor your daily intake, especially if you’re sensitive to stimulants or trying to limit consumption for health reasons. Even seemingly harmless sodas or sugar-free options contribute to your total caffeine load.

Frequently Asked Questions

How much caffeine is safe for a 70kg adult per day?

A 70kg adult should consume no more than 500mg of caffeine per day, with 300–400mg recommended. This is roughly equivalent to 4–6 cups of coffee, depending on brew strength.

How much caffeine is in a can of Coca-Cola?

A 100ml serving of Coca-Cola contains 9.7mg of caffeine. A standard 330ml can contains approximately 32mg of caffeine total.

What’s the caffeine content of Diet Coke per 100ml?

Diet Coke contains 12.7mg of caffeine per 100ml. That’s slightly higher than regular Coca-Cola and adds up in larger servings.

How much caffeine is in a Red Bull Energy Shot?

Red Bull Energy Shot contains 133.3mg of caffeine per 100ml. Given its small serving size (usually 60ml), that’s around 80mg of caffeine in one shot.

Which common drink has the highest caffeine per 100ml?

Red Bull Energy Shot has the highest caffeine content at 133.3mg per 100ml, followed by regular Red Bull at 32mg per 100ml.

Does Diet Pepsi have less caffeine than regular Pepsi Max?

Yes, Diet Pepsi has 10.1mg of caffeine per 100ml, which is less than Pepsi Max’s 19.4mg per 100ml.

FrontStreet Coffee Picks for Caffeine Lovers

For coffee drinkers monitoring their caffeine routine, try FrontStreet Coffee’s Ethiopia Humbera for bright citrus and floral notes, or Yirgacheffe for juicy berry tones with a light body. Both are single-origin espressos or filter options that let you enjoy distinct flavours without heavy roasting. If you prefer a stronger kick, their Classic Blend offers balanced malt and chocolate with a medium roast. All deliver smooth, repeatable cups—perfect for staying alert the natural way. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.