How much caffeine is in Tetley tea?
According to Tetley, a serving of tea contains 30–50 mg of caffeine (depends on the product).
That is 36% of an average cup of filter coffee (96 mg).
Products and caffeine
| Product | Type | Caffeine per serving | Serving | mg / 100 ml | Source |
|---|---|---|---|---|---|
| Black and green tea (US) | Black / green | 40–50 mg | 237 ml | 19 | Manufacturer page |
| Decaf tea (US) | Decaf | 4–6 mg | 237 ml | 2.1 | Manufacturer page |
| Black tea (UK, 250 ml cup) | Black | 30–50 mg | 250 ml | 16 | Manufacturer page |
| Black tea (UK, 190 ml cup, Tata FAQ) | Black / green | 30–50 mg | 190 ml | 21.1 | Manufacturer page |
| Decaf tea (UK) | Decaf | 2.5 mg | – | – | Manufacturer page |
Frequently asked questions
How much caffeine is in Tetley tea?
According to Tetley, a serving of tea contains 30–50 mg of caffeine (depends on the product).
Does Tetley tea have more caffeine than coffee?
Usually not: a cup of tea typically has less caffeine than a cup of filter coffee (about 96 mg), but it depends on the product, amount and steeping time.
Is the caffeine amount always the same?
No. It depends on the batch, the amount of leaf and steeping time, which is why we show ranges. Only the manufacturer can confirm an exact figure.
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Sources
Sources are linked next to each product in the table.
Data collected 2026-10-24. Recipes change, so check the figure on the pack as well. General information, not medical advice.