Does Tea Have Caffeine? A Complete Guide by Tea Type
Last updated: June 2026
Yes — all true teas contain caffeine. White tea, green tea, oolong, and black tea all come from the same plant (Camellia sinensis), and that plant naturally produces caffeine. There’s no such thing as caffeine-free green tea or caffeine-free black tea from this plant.
What varies significantly is how much caffeine ends up in your cup. The type of tea, how long you steep it, and the water temperature all affect the final caffeine level. This guide covers the numbers, what they mean for your day, and which Nepal Hills teas are your best options if you’re watching your caffeine intake.
How Much Caffeine Is in Tea?
| Tea Type | Caffeine per 250ml Cup | Comparison |
|---|---|---|
| White tea | 15–30 mg | ~1/4 of a coffee |
| Green tea | 25–45 mg | ~1/3 of a coffee |
| Oolong tea | 30–60 mg | ~1/3–1/2 of a coffee |
| Black tea | 40–70 mg | ~1/2 of a coffee |
| Espresso (single shot) | 60–75 mg | — |
| Drip coffee (250ml) | 80–120 mg | — |
Why Does Caffeine Vary Between Tea Types?
White Tea: Least Processed, Lowest Caffeine
White tea is made from young buds and leaves that are simply withered and dried. Young buds actually contain higher concentrations of caffeine by weight than older leaves, but because white tea is so delicately brewed (lower temperature, shorter steep time), less caffeine is extracted into the cup.
Green Tea: Lightly Processed, Moderate Caffeine
Green tea leaves are heated shortly after harvesting to stop oxidation, then rolled and dried. Caffeine content is moderate and strongly affected by brewing temperature.
Oolong Tea: Partially Oxidized, Variable Caffeine
Oolong sits between green and black tea in both oxidation and caffeine. Our Floral Oolong ($10/25g) is lightly oxidized, giving it a gentle caffeine profile. Our Dark Oolong ($10/25g) is bolder and carries more caffeine.
Black Tea: Fully Oxidized, Highest Caffeine
Black tea is fully oxidized. Our Muscatel Black ($10/25g) from the Norling Speciality Tea estate in Ilam is surprisingly smooth — the honey-grape, dried apricot notes come without bitterness even at full oxidation.
What Affects Caffeine Levels in Tea?
Water temperature: Hotter water extracts caffeine faster. Brewing white and green teas at 70–80°C produces a gentler cup.
Steeping time: Longer steeping = more caffeine. Most caffeine is extracted in the first 2–3 minutes.
Leaf-to-water ratio: More tea per cup = more caffeine. Standard: 2–3g per 250ml.
Re-steeping: Each successive steep extracts less caffeine than the previous one.
Tea vs. Coffee: The Real Caffeine Comparison
Tea contains L-theanine — an amino acid that moderates caffeine’s stimulation. This is why tea’s caffeine hits differently than coffee’s, even at similar milligram amounts. Many people describe black tea as giving steadier, longer-lasting energy than coffee.
Lowest-Caffeine Options at Nepal Hills Tea
- Floral White Tea ($10/25g) — spring blossom, soft rose, velvety. Lowest caffeine in our range.
- Fresh White Tea ($10/25g) — wildflower, morning dew, crisp and clean.
- Organic Light Green Tea ($20/50g) — smooth, low-stimulation, grown on certified organic farms. From Farmers Tea Co, Ilam at 5,500 ft.
- Floral Green Tea ($10/25g) — naturally floral, no added flowers.
Not sure where to start? The Tea Sampler Kit ($30) includes 10 single-origin teas across all four types.
Frequently Asked Questions
Does all tea have caffeine?
All tea made from the Camellia sinensis plant — including white, green, oolong, and black tea — contains caffeine. Herbal teas (chamomile, peppermint, rooibos) are not made from the tea plant and contain zero caffeine.
How much caffeine is in a cup of black tea?
A standard brewed cup of black tea (250ml, using 2–3g of tea) contains approximately 40–70mg of caffeine. This is roughly half the caffeine of a cup of drip coffee.
Does green tea have a lot of caffeine?
Green tea has moderate caffeine — typically 25–45mg per cup, about one-third of a coffee. It also contains L-theanine, which produces calm alertness. Brewing at 75–80°C reduces caffeine extraction significantly.
Is white tea caffeine-free?
No. White tea contains caffeine — roughly 15–30mg per cup — but it has the least of any true tea. If you need zero caffeine, choose an herbal tisane.
Does steeping tea longer increase caffeine?
Yes. Longer steeping extracts more caffeine. Most caffeine is released in the first 2–3 minutes. A 5-minute steep can have 30–50% more caffeine than a 2-minute steep.
Why does tea caffeine feel different from coffee caffeine?
Tea contains L-theanine, which produces calm, sustained alertness rather than a sharp spike. Tea also delivers caffeine in a smaller total dose — typically 15–70mg vs 80–120mg in coffee.
Related Reading
- Best Tea for Sleep: Low-Caffeine Options That Actually Work
- Switching from Coffee to Tea: A Practical Guide
- Best Tea for Energy: How to Get a Sustained Lift Without the Crash
- White Tea Benefits: Why the Least Processed Tea May Be the Healthiest
- How to Brew Loose Leaf Tea: The Complete Guide
- Loose Leaf Tea vs Tea Bags: Is There a Real Difference?