How much caffeine is in Chai latte?

A standard 240 ml (8.1 fl oz) chai latte contains 50 mg of caffeine. That is roughly half the caffeine in a same-sized cup of drip coffee (96 mg) and represents 13% of the FDA’s daily 400 mg guidance for healthy adults.

The caffeine in a chai latte comes from the black tea leaves used to brew the spiced tea concentrate—cinnamon, cardamom, ginger, and other botanicals contribute flavour but not caffeine. Per 100 ml, the concentration is about 20.8 mg, placing it in the moderate range: enough to produce a gentle sense of alertness within 30 minutes, but unlikely to cause the jitteriness that a strong coffee might trigger in sensitive individuals.

Because a chai latte also contains milk and sugar in most preparations, its stimulant effect arrives alongside a small food matrix that can slow absorption slightly, though this difference is marginal with such a modest dose.

How long Chai latte stays in your system

The human body metabolises caffeine with a population-average half-life of 5.7 hours. Starting from the 50 mg dose in a chai latte, the arithmetic is straightforward: remaining caffeine = 50 × 0.5^(hours/5.7). After 3 hours, approximately 35 mg remain; after 6 hours, 24 mg; after 9 hours, 17 mg; and after 12 hours, the system still carries roughly 12 mg. These values follow the first-order decay model used across our tools.

What does that mean for someone who drinks a chai latte at 3 p.m.? By 9 p.m., the residual 17 mg is about one-third of the original dose. For some people, that is enough to delay sleep onset or reduce deep-sleep duration. The well-known Drake et al. 2013 study showed that 400 mg of caffeine taken six hours before bed still cost participants over an hour of sleep; while 50 mg is far smaller, individual sensitivity varies widely. Our latest-cup-before-bed calculator lets you model exactly when a given dose should be finished to meet your personal wind-down target.

A single 240 ml chai latte accounts for 13% of the widely cited 400 mg daily limit (FDA; EFSA). Theoretically, an adult could drink eight such lattes before hitting the cap, but that calculation ignores the substantial milk and sugar—and the fact that caffeine from other sources (tea, soda, chocolate) would add up. The EFSA also recommends that single doses stay below 200 mg to avoid acute side-effects; at 50 mg, the chai latte is well inside that window.

Timing matters more than the absolute dose for sleep. Using the decay model, if you go to bed at 11 p.m. and want fewer than 15 mg of residual caffeine, a chai latte should be finished by about 2 p.m. (9 hours earlier). Our latest-cup-before-bed calculator can model your personal caffeine half-life, which may be shorter or longer than the 5.7-hour average. Pregnant individuals are advised by EFSA to keep total daily caffeine intake under 200 mg, meaning a chai latte fills one-quarter of that allowance. Adolescents, who generally have a lower body mass, may be advised by paediatric guidelines to limit total caffeine to 100 mg per day or less, in which case one chai latte consumes at least half of that budget.

In the tea category, a chai latte (50 mg) is almost identical to English Breakfast tea (50 mg) and sits slightly ahead of black tea (47 mg) and Earl Grey (47 mg). All three are made from Camellia sinensis leaves and contain comparable caffeine when brewed to similar strength; the milk and spices in a chai latte do not alter the caffeine dose. Moving down the list, oolong tea provides 37 mg, green tea 28 mg, and white tea only 16 mg per 240 ml. These differences arise from leaf age, oxidation level, and typical brewing temperature—not from the plant species, which is the same.

Compared with coffees, the chai latte is a moderate choice. A same-volume drip coffee delivers 96 mg, so two chai lattes would roughly match one cup of ordinary brew. Espresso is far more concentrated: a single 30 ml shot packs 63 mg, meaning a 240 ml cup of straight espresso would contain an impractical 504 mg—but in practice, espresso is rarely drunk in large volumes. When benchmarked against popular energy drinks, a 250 ml Red Bull holds 80 mg and a 473 ml Monster Energy 160 mg; by volume, the chai latte is less potent than both, but it provides caffeine alongside a slower-release matrix of milk fat and carbohydrates. For side-by-side numbers across dozens of drinks, try our caffeine comparison tool.

What changes the number for Chai latte

The 50 mg figure is a representative value for an 8 fl oz (240 ml) chai latte made with a typical black-tea concentrate—the kind served in many coffee-shop chains. In practice, the caffeine content of a chai latte can depart substantially from that midpoint because the drink has no single standardised recipe. Published analytical data for an 8-oz serving span roughly 30 mg to 95 mg, depending on the brand, the tea-to-milk ratio, and how the tea is brewed.

Several factors swing the number:

• Size. Many cafés sell chai lattes in 12 oz, 16 oz, or 20 oz cups. Assuming the same concentrate strength, caffeine scales almost linearly with volume—a 16 oz serving could deliver around 100 mg, though commercial chains often dilute the concentrate less for larger sizes, making the relationship not perfectly linear.
• Tea base and strength. Traditional chai uses a strong Assam black tea, but recipes vary. Some cafés use a powdered chai mix that may contain less tea solids, while others brew loose-leaf chai from scratch. Steep time and water temperature also influence how much caffeine is extracted.
• “Dirty” chai. Adding a shot of espresso (63 mg per 30 ml) can boost a small chai latte to over 110 mg. Decaf versions, by contrast, are not included in the dataset but typically contain less than 5 mg per serving.
• Pre-packaged concentrates. Popular retail chai concentrates often list caffeine on the label; those numbers usually range from 30 to 55 mg per 8-oz serving before milk is added.

Because of this variability, the single-number estimate on this page is most reliable for a standard café order—and even then, barista technique can shift it. For more on how preparation details affect the caffeine level, see our chai latte caffeine guide. For the most accurate picture of your usual order, check the brand’s published nutrition facts or, if you brew at home, consult the tea-leaf data in our open caffeine dataset.

Where this figure comes from

The 50 mg value is a composite drawn from publicly available data, including product-label disclosures from major coffee-shop chains, third-party laboratory analyses, and the USDA’s FoodData Central. We treat it as a best-estimate midpoint for a modestly sized, commercially prepared chai latte. If you see a different number elsewhere, it is almost certainly because the serving size, tea concentration, or brand differs; published values for the same nominal drink have ranged from 30 mg to 95 mg per 8 oz.

We update our figures when new, reliable evidence emerges. Several of the underlying datasets are available in our open caffeine dataset, where you can review the sources, see collection dates, and even suggest additions or corrections. If you have a lab report or an official nutrition panel for a specific chai product, we encourage you to share it—that is how the accuracy of these pages gets iteratively improved.

Bottom line

An 8 fl oz (240 ml) chai latte contains around 50 mg of caffeine—about half the caffeine of a same-size drip coffee and roughly 13% of the 400 mg daily limit for healthy adults. The dose decays to about 24 mg after six hours and 12 mg after twelve, so an early-afternoon cup is unlikely to disturb most people’s sleep, though the timing matters for those who are sensitive. Because preparation varies, your chai latte may carry a bit more or less; the key is to treat 50 mg as a useful benchmark, not a universal constant.