How Much Caffeine Is Really in Your Coffee?

You’re not alone if you’ve ever wondered whether that morning cup of coffee or tea packs more of a jolt. With over 80% of Americans relying on caffeine daily, the question isn’t just academic—it’s about how much buzz you’re really getting.

The short answer? A standard 227ml cup of coffee typically contains 60–180mg of caffeine, while the same amount of tea holds 20–90mg. But gram for gram, tea leaves actually have more caffeine than coffee beans. It’s just that you use far less tea leaf per cup.

Why the Confusion About Caffeine in Coffee vs Tea?

Most people assume coffee always has more caffeine because it feels stronger. But the reality is more nuanced. Studies show that if you measure by weight, dried tea leaves contain more caffeine than coffee beans. However, you use a lot more coffee beans per brewed cup than tea leaves, which shifts the balance.

Caffeine Content by Brew Type

Not all coffee brews are created equal when it comes to caffeine:

• Drip-filtered coffee (like pour-over or drip machines) delivers the most caffeine per cup.
• Filtered coffee (standard brewed) comes next.
• Instant coffee has the least caffeine.

For tea, the longer you steep, the more caffeine ends up in your cup:

• Steeping for 1 minute yields up to 35mg of caffeine per 142ml.
• Steeping for 5 minutes increases that to around 50mg per 142ml.

A typical 227ml cup of tea contains 20–90mg of caffeine, while the same size coffee cup holds 60–180mg.

Tea’s Other Stimulant: Theophylline

Tea isn’t just about caffeine. It also contains theophylline, another stimulant that affects the central nervous system. While not as well-known as caffeine, theophylline contributes to tea’s energizing effect—though it’s present in smaller amounts. Both tea and coffee stimulate you, but through slightly different chemical combinations.

Frequently Asked Questions

Does a single gram of tea have more caffeine than a gram of coffee?

Yes. Research shows that, by weight, tea leaves generally contain more caffeine than coffee beans. However, a typical serving of tea uses far less leaf than a serving of coffee uses beans, so a brewed cup of coffee usually ends up with more total caffeine.

Which coffee brewing method gives the most caffeine?

Drip-filtered coffee (like pour-over or standard drip machines) produces the most caffeine per cup. Filtered coffee (standard brewed) is next, and instant coffee has the least. The brewing method significantly impacts how much caffeine ends up in your drink.

Does steeping tea longer increase caffeine?

Yes. Steeping tea for 1 minute can result in up to 35mg of caffeine per 142ml, while a 5-minute steep can raise that to around 50mg per 142ml. The longer you steep, the more caffeine is extracted into the cup.

Is there another stimulant in tea besides caffeine?

Yes. Tea also contains theophylline, a compound that stimulates the central nervous system. While it’s not as prominent as caffeine, it contributes to tea’s overall energizing effect.

Why does coffee feel stronger than tea even if tea has more caffeine by weight?

Coffee feels stronger because you use more coffee beans per cup than tea leaves per cup, resulting in higher total caffeine in the average brewed cup. Also, the combination of caffeine and other compounds in coffee creates a different, often more intense, stimulation effect.

Recommended FrontStreet Beans for Caffeine Lovers

For a strong caffeine kick, try FrontStreet Coffee’s Ethiopia Yirgacheffe for bright, citrusy energy; their Colombia Huila for a balanced, nutty punch; or the Brazil Queen Manor for a heavy-bodied, chocolatey jolt. All three are single-origin espressos or pour-overs with robust profiles built for focus. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.