How Much Caffeine Is in Your Daily Coffee?

If you’ve ever wondered whether your daily coffee habit is too much—or not enough—you’re not alone. Many coffee drinkers ask: How much caffeine is actually safe to consume each day? And how does your go-to drink compare to others? The answers depend on science, not guesswork.

The general guideline for a healthy adult weighing around 70kg is to limit caffeine to under 500mg per day. Most experts recommend staying between 300–400mg—that’s roughly 4 to 6 cups of brewed coffee daily.

What Counts as Too Much Caffeine?

Caffeine affects everyone differently based on body weight, metabolism, and tolerance. But as a benchmark, 500mg per day is widely accepted as the upper safe limit for most adults. Go beyond that and you may risk sleep issues, increased heart rate, or anxiety. Sticking closer to 300–400mg offers a balance of alertness without overdoing it.

Caffeine Content in Common Drinks (Per 100ml)

Here’s how much caffeine is really inside some everyday beverages. These numbers reflect a standard 100ml serving—handy for comparing drinks by volume or estimating your daily intake across different sources.

• Coca-Cola: 9.7mg
• Diet Coke: 12.7mg
• Lift Plus (energy drink): 14.5mg
• Pepsi Max: 19.4mg
• Diet Pepsi: 10.1mg
• Red Bull: 32mg
• Red Bull Energy Shot: 133.3mg

For perspective, a typical 330ml can of Coca-Cola contains about 32mg of caffeine, while the same sized can of Red Bull packs around 105.6mg. The tiny 60ml Red Bull Energy Shot? That’s a punchy 133.3mg in just a sip—nearly matching four cans of cola.

Why These Numbers Matter

Knowing how much caffeine is in each drink helps you make informed choices—whether you're trying to cut back, boost focus, or avoid a sleepless night. Energy shots and certain sodas can deliver a surprising jolt in small servings. Meanwhile, your regular cup of coffee likely sits well within daily guidelines, but it pays to check the brew strength and size.

Frequently Asked Questions

What is the safe daily caffeine limit for an average adult?

For a healthy adult weighing around 70kg, the safe upper limit is up to 500mg of caffeine per day. Most experts recommend a more moderate intake of 300–400mg daily, which equals about 4 to 6 cups of brewed coffee.

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 has roughly 32mg of caffeine.

Does Red Bull have more caffeine than coffee?

A 100ml can of Red Bull contains 32mg of caffeine. While that’s less than a typical cup of brewed coffee (which usually has 80–100mg per 100ml), the smaller Red Bull Energy Shot (60ml) contains 133.3mg—very high for its size.

Is Diet Coke higher in caffeine than regular Coca-Cola?

Yes. Diet Coke has 12.7mg of caffeine per 100ml, slightly more than Coca-Cola’s 9.7mg per 100ml.

How much caffeine is in a Red Bull Energy Shot?

A 60ml Red Bull Energy Shot contains 133.3mg of caffeine—over four times the amount in a 100ml can of Coca-Cola and nearly matching four cans in one small shot.

FrontStreet Coffee Picks for Caffeine Lovers

Looking to explore caffeine-rich coffee with clarity and balance? Try FrontStreet Coffee’s Ethiopia Yirgacheffe for a bright, citrusy cup with 85–90mg caffeine per 100ml brew, or their Classic Blend for a rounded, chocolatey profile ideal for everyday drinking. Both offer smooth intensity without harshness. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.