Earl Grey Tea: Understanding Its Caffeine Content

A 240 ml cup of Earl Grey tea has 47 mg of caffeine.

• 47 mg — the caffeine in a 240 ml cup of Earl Grey (same as standard black tea in USDA data).
• ~23 mg remains about 6 hours after a 47 mg dose (population-average decay: half-life 5.7 h).
• 400 mg/day — the FDA’s recommended upper limit for healthy adults; one cup of Earl Grey is ~12% of that.
• ~200 mg/day — common pregnancy guidance; two to four cups of Earl Grey can reach this level depending on brewing.

Caffeine levels in Earl Grey tea

Earl Grey is a black-tea blend flavored with bergamot oil. The authoritative dataset (USDA-style values reflected in FoodData Central) lists a 240 ml cup of Earl Grey at 47 mg of caffeine — equivalent to the black tea baseline. That number is a practical average for a standard teabag steeped in 240 ml of hot water.

Black tea base and what determines caffeine amount

Two primary factors set caffeine in Earl Grey: the black-tea leaf itself and brewing parameters. Leaf variety, processing, and particle size (broken leaves in tea bags release more caffeine than whole-leaf) matter, plus steep time and water temperature.

Brewing variables

• Steep time: longer steep → more caffeine. A short 2-minute steep can cut extraction compared with a 4–5 minute steep.
• Leaf amount and surface area: one heaping tsp of loose leaf yields more caffeine than a single bag if the bag contains less leaf.
• Water temperature: near-boiling extracts black-tea caffeine efficiently; cooler water extracts less.

Comparing Earl Grey to other common beverages

Below is a direct comparison using the dataset values to show where Earl Grey sits among teas, coffees and energy drinks.

Drink (serving)	Caffeine (mg)	Serving size
Earl Grey tea	47 mg	240 ml
Black tea	47 mg	240 ml
English Breakfast tea	50 mg	240 ml
Green tea	28 mg	240 ml
Matcha (1 tsp)	70 mg	240 ml
Yerba mate	85 mg	240 ml
Drip coffee	96 mg	240 ml
Cold brew	200 mg	240 ml
Espresso (single)	63 mg	30 ml
Decaf coffee	3 mg	240 ml

Takeaway: Earl Grey sits with standard black teas (~47–50 mg per 240 ml), well below brewed coffee and concentrated cold brew, but higher than typical green and white teas.

Bergamot: flavor, not caffeine

Bergamot oil (the citrus used to flavor Earl Grey) contributes aroma and taste but no measurable caffeine. Bergamot can slightly change mouthfeel and perceived strength, which may influence whether you add milk or steep longer, but it does not alter the tea’s inherent caffeine content.

Caffeine decay and timing vs sleep

Caffeine elimination follows exponential decay with a population-average half-life of about 5.7 hours (sources: multiple pharmacokinetic reviews). Using that standard, here is how much caffeine from a 47 mg cup of Earl Grey remains at common intervals.

Time after drinking	% remaining (approx)	mg remaining (approx)
0 hours	100%	47 mg
3 hours	~69%	~32 mg
6 hours	~48%	~23 mg
9 hours	~33%	~16 mg
12 hours	~23%	~11 mg

Practical guidance: if you are sensitive to caffeine or trying to protect sleep, avoid consuming caffeine within 6 hours of planned bedtime to reduce active caffeine by roughly half (individual metabolism varies widely).

Health, safety and daily limits

Authoritative guidance: the U.S. FDA cites ≤ 400 mg/day as a tolerable upper limit for healthy adults; many pregnancy sources and the European Food Safety Authority recommend limiting caffeine to about 200 mg/day during pregnancy. The American Academy of Pediatrics discourages caffeine for adolescents. One 240 ml cup of Earl Grey (47 mg) is about 12% of 400 mg and about 24% of a 200 mg pregnancy limit.

Special caution: those with anxiety, cardiac arrhythmias, pregnancy, or medications that slow caffeine clearance should consult a clinician before changing intake. This page is informational, not medical advice.

Practical brewing tips to lower or raise caffeine

• Use a shorter steep (1.5–2 minutes) to lower extraction; 3–5 minutes yields the dataset average.
• Choose whole-leaf Earl Grey and use fewer grams per 240 ml to reduce caffeine; bagged teas typically deliver the dataset average.
• For lower-caffeine alternatives, pick white tea (16 mg/240 ml) or green tea (28 mg/240 ml), or choose herbal (0 mg).
• If you need a milky hot drink with lower caffeine, chai latte in the dataset is 50 mg/240 ml — similar to Earl Grey but with milk diluting strength.

Tracking intake

For people tracking daily caffeine to stay under limits or manage sleep, logging each cup matters: 47 mg per Earl Grey adds up if you drink several. Apps such as CoffeeLog (for iOS) let you record cups, serving sizes and see decay over time so you can plan evening caffeine cutoffs and avoid surprising totals.

Sources and further reading

Key references for values and limits include USDA FoodData Central (tea and beverage composition), the U.S. Food and Drug Administration (daily limits), European Food Safety Authority, Mayo Clinic guidance on caffeine and sleep, and recommendations from the American Academy of Pediatrics on children and adolescents.

Note: numbers above come from standard beverage composition datasets; individual teas and home brewing can produce higher or lower values.