Tea Caffeine Calculator – Find Out How Much Caffeine Is in Your Favorite Tea
As more people seek healthier alternatives to coffee and energy drinks, tea is becoming the go-to beverage for a smoother caffeine experience. But here's the catch: Not all teas have the same caffeine content.
And while some people want a gentle boost, others need to limit their intake for health, pregnancy, or better sleep. That’s where the Tea Caffeine Calculator steps in — to help you brew smarter, based on science and tradition.
How Much Caffeine Is in Tea?
Here's a quick breakdown of average caffeine levels in common teas (per 8 oz cup):
| Tea Type | Caffeine (mg) | Notes |
|---|---|---|
| Green Tea | 20–35 mg | Varies by leaf and steep time |
| White Tea | 15–30 mg | Often lower, but depends on buds |
| Oolong Tea | 30–50 mg | Medium caffeine |
| Black Tea | 40–70 mg | Stronger than most tea types |
| Pu-erh (ripe) | 30–70 mg | Can be as strong as coffee |
| Matcha | 60–90 mg | Powdered form = more caffeine |
| Herbal Tea | 0 mg | Naturally caffeine-free |
But caffeine can fluctuate based on brewing time, temperature, leaf quality, and amount used.
How the Tea Caffeine Calculator Works
Our tool calculates caffeine content based on:
- Tea type
- Serving size (in oz or ml)
- Steeping time
- Brewing style (Western vs Gongfu)
Whether you're sipping on a mild Longjing or a strong Assam, this calculator gives you a personalized caffeine estimate—instantly.
Why It’s Useful (with Data)
- Google searches for “tea caffeine vs coffee” grew by +78% from 2020 to 2024
- 62% of U.S. consumers actively manage their caffeine intake (Statista, 2023)
- Caffeine sensitivity is common: even 30–50 mg can impact sleep in some people
- Many health tracking apps now integrate tea caffeine input
Using this calculator on your site helps educate your audience and keeps them engaged longer.
Real-World Example
- Scenario: You’re brewing 250ml (about 8.5 oz) of oolong tea for 2 minutes.
- Estimated caffeine: ~35–45mg.
Want it stronger? Steep longer or use more leaves—and the calculator shows the change in real time.
Tips for Caffeine-Conscious Tea Drinkers
- Avoid high-caffeine teas after 4 PM if you’re sensitive
- Re-steeping reduces caffeine by ~50% in second infusion
- Opt for herbal blends like chamomile, mint, or rooibos before bedtime
- Cold brew tea has less caffeine, due to lower extraction
FAQ – Tea Caffeine Calculator
Q: How accurate is the caffeine estimate?
A: The calculator provides an informed estimate based on lab averages and brewing science. Caffeine content naturally varies by batch and brand.
Q: Does Gongfu brewing affect caffeine?
A: Yes. Gongfu style uses more leaves but shorter steeps. Each infusion has less caffeine, but cumulative intake can be high.
Q: Can I calculate for Matcha or powdered teas?
A: Yes. Since you consume the whole leaf, Matcha has higher caffeine per gram. The tool adjusts for that.
Q: Is herbal tea completely caffeine-free?
A: Most herbal teas are caffeine-free, but check ingredients—some blends include real tea leaves.
Use the Tool Now
It only takes 10 seconds to get your custom tea caffeine estimate—and it could save your sleep or help you hit your focus goals.