Dunkin Cold Brew: Exact Caffeine Content by Size

Dunkin Cold Brew (Medium, 710 ml) contains 260 mg of caffeine.

• 260 mg — caffeine in a Dunkin Cold Brew (Medium, 710 ml).
• 210 mg — Dunkin' Original Blend (Medium, 414 ml) for a typical hot brew comparison.
• 119 mg — Dunkin Latte (Medium, 414 ml), showing milk drinks dilute caffeine.
• After 6 hours ≈ 125 mg remains from a 260 mg Dunkin Cold Brew (population-average decay).

Caffeine content by Dunkin Cold Brew size (exact and estimated)

Only one official Dunkin Cold Brew value is published in the dataset: the Medium size (710 ml) is listed at 260 mg. Smaller and larger Dunkin sizes are commonly offered in stores but exact official mg values are not in the dataset; below are transparent estimates and the single confirmed number you can rely on.

Confirmed

Dunkin Cold Brew (Medium, 710 ml): 260 mg — this is the dataset value you should use when counting caffeine.

Estimates for other sizes

• Small (estimate): roughly 1/2–2/3 of Medium → estimate ~130–175 mg (not in dataset).
• Large (estimate): roughly 1.25–1.5× Medium → estimate ~325–390 mg (not in dataset).

When exact labeling matters (pregnancy, medication, sleep), use the Medium 260 mg figure or ask staff for an official nutrition sheet at the location.

How Dunkin Cold Brew compares to other popular drinks

Cold brew is among the higher-caffeine brewed coffees because it uses a higher coffee-to-water ratio and long extraction time. The table below compares Dunkin Cold Brew (Medium) to several dataset values from Dunkin, other coffees, and popular chains.

Caffeine decay: how much remains in your body after drinking Dunkin Cold Brew

Population-average half-life for caffeine is ~5.7 hours. That means caffeine concentration roughly halves every 5.7 hours; practical remaining percentages are: after 3 h ≈ 69%, after 6 h ≈ 48%, after 9 h ≈ 33%, after 12 h ≈ 23%.

Starting from the confirmed Dunkin Medium dose of 260 mg, here are concrete remaining amounts (rounded):

Example interpretation: if you drink a 260 mg Dunkin Cold Brew at 4 PM, a population-average person would still have ~125 mg of caffeine at 10 PM — likely enough to affect sleep for some people.

Factors that make the caffeine number vary

Cold brew caffeine can shift because of:

• Concentration: many shops serve a cold-brew concentrate diluted to taste; concentrate has more mg per ml.
• Bean and roast: lighter roasts can yield slightly more extractable caffeine; grind and origin matter.
• Steep time and coffee-to-water ratio: longer steep and higher ratio → more caffeine.
• Serving variability: real-world pours and added shots change mg; always use the labeled figure when available.

Health, safety and timing

Recommendations from authorities: the FDA cites 400 mg/day as a reasonable upper limit for most healthy adults; during pregnancy many experts and EFSA advise limiting to roughly 200 mg/day, and the American Academy of Pediatrics discourages caffeine for adolescents. For acute concerns (palpitations, severe anxiety), contact a healthcare professional immediately.

Practical guidance: a single Dunkin Medium (260 mg) is over half the 400 mg-adult limit and meets or exceeds pregnancy day limits, so pregnant people and those sensitive to caffeine should avoid or choose smaller servings. For sleep, consider avoiding cold brew within 6–10 hours of planned bedtime because substantial caffeine remains during that window.

Track your intake and next steps

If you drink cold brew regularly, track exact servings and times — apps like CoffeeLog can log the 260 mg Medium value automatically and sum daily totals so you stay under your personal limit. For medication interactions, pregnancy, heart conditions or seizure disorders, discuss caffeine use with a clinician and use the FDA, Mayo Clinic, and EFSA guidelines as reference points.

Quick notes and sources

• Dataset values used: Dunkin Cold Brew (Medium, 710 ml) = 260 mg; Dunkin' Original Blend (Medium) = 210 mg; Dunkin Latte (Medium) = 119 mg; generic cold brew 240 ml = 200 mg; nitro cold brew 240 ml = 215 mg.
• Authoritative guidance cited: FDA, EFSA, Mayo Clinic, American Academy of Pediatrics, USDA FoodData Central for beverage nutrient baselines.

Information here is informational, not medical advice. For personalized medical recommendations about caffeine in pregnancy, anxiety, sleep disorders, or possible overdose, consult a qualified healthcare professional.

How many milligrams of caffeine are in 100 ml of Dunkin Cold Brew?

One hundred milliliters of Dunkin Cold Brew contains about 36.6 mg of caffeine based on the dataset value of 260 mg for a 710 ml Medium. This is calculated directly from the dataset: 260 mg ÷ 710 ml × 100 ml = 36.6197 mg per 100 ml (rounded to 36.6 mg per 100 ml).

Concentration is mg per ml.

Showing the arithmetic step by step: 260 mg ÷ 710 ml = 0.366197 mg/ml, and 0.366197 mg/ml × 100 ml = 36.6197 mg; the dataset lists the Medium Dunkin Cold Brew as 260 mg, 710 ml. If you prefer volume-based comparison tools, see our cold-brew guide for concentration-context at Cold Brew Coffee: Complete Caffeine Content Guide and the measurement primer at Caffeine in Coffee: Exact Milligrams and Measurement Guide.

If I split a Medium Dunkin Cold Brew between two people, how much caffeine does each person get and is that within pregnancy limits?

Splitting a Medium Dunkin Cold Brew evenly gives each person 130 mg because 260 mg ÷ 2 = 130 mg; 130 mg is below the 200 mg/day pregnancy guideline recommended by EFSA and echoed by other authorities. Therefore one half of a Medium meets the 200 mg pregnancy limit cited by the European Food Safety Authority (EFSA 2015).

Serving is the portion you consume.

Practical note: the dataset value is explicit—Dunkin Cold Brew (Medium, 710 ml) = 260 mg—so if a pregnant person wants a single serving, choose half a Medium (130 mg) or a smaller labeled beverage; see our pregnancy-focused advice at Caffeine During Pregnancy: How Much Is Safe? for further reading.

How many more milligrams can I add to a 260 mg Dunkin Medium before reaching the FDA's 400 mg daily limit?

You can add 140 mg to a 260 mg Dunkin Medium before hitting the FDA's 400 mg/day guidance because 400 mg − 260 mg = 140 mg; the FDA lists 400 mg/day as a reasonable upper limit for most healthy adults (FDA).

Daily limit is the guideline upper bound for most healthy adults.

Examples using dataset values: adding a 240 ml Americano (126 mg in the dataset) to a 260 mg Medium gives 386 mg (260 + 126 = 386 mg), which stays under 400 mg; adding a 250 ml Red Bull (80 mg) gives 340 mg (260 + 80 = 340 mg) and still leaves 60 mg of headroom. If you want to sum multiple items automatically, try the site calculator at caffeine half-life calculator (mg left right now) or compare drinks side-by-side at caffeine comparison.

How long after drinking a 260 mg Dunkin Medium will caffeine fall below 100 mg?

A population-average person will have under 100 mg of caffeine about 7.9 hours after drinking a 260 mg Dunkin Medium, using the page's decay model with a half-life of 5.7 hours. The calculation solves 260 × 0.5^(t/5.7) = 100 → t ≈ 7.86 hours (≈7 hours 51 minutes).

Half-life is the time it takes for the body to eliminate half of the caffeine.

Arithmetic shown: set 0.5^(t/5.7) = 100/260 = 0.384615; take natural logs ln(0.384615) = -0.955511, divide by ln(0.5) = -0.693147 → t/5.7 = 1.3779 → t = 1.3779 × 5.7 = 7.857 hours. For practical reference the page's decay table shows ≈125 mg remaining at 6 hours and ≈86 mg at 9 hours from the same 260 mg starting dose; researchers also found that a 400 mg dose taken 6 hours before bedtime reduced objective sleep in a clinical study (Drake et al. 2013), so the 6–8 hour window matters for sleep-sensitive people.

Can I combine a Dunkin Medium with a high-caffeine energy drink like Bang and stay safe?

Combining a 260 mg Dunkin Medium with a Bang energy drink (300 mg in the dataset) produces 560 mg total (260 + 300 = 560 mg), which exceeds the FDA's 400 mg/day guidance and is not recommended for most adults (FDA).

Combination exposure is the summed mg of each beverage consumed.

Because the dataset lists Bang at 300 mg and Dunkin Medium at 260 mg, the arithmetic is straightforward and shows the safety margin is exceeded; for information on acute risks and what to watch for, consult our guide on Caffeine Overdose: Symptoms, Risks, and Prevention and the energy-drink breakdown at Bang Energy Drink: Exactly How Much Caffeine is Inside?.

Bottom line

Dunkin Cold Brew (Medium, 710 ml) contains 260 mg of caffeine according to the dataset; that equals about 36.6 mg per 100 ml (260 mg ÷ 710 ml × 100 ml = 36.6197 mg). Using the page's decay model (population-average half-life = 5.7 hours), remaining caffeine follows 260 × 0.5^(hours/5.7): after ~3 hours ≈179 mg, after 6 hours ≈125 mg, after about 7.9 hours it falls below 100 mg, and after 12 hours ≈60 mg remain.

For daily limits, the FDA puts a reasonable upper bound at 400 mg/day (FDA) and EFSA recommends a 200 mg/day limit in pregnancy (EFSA 2015). A single Medium Dunkin Cold Brew (260 mg) is over half the FDA adult limit and exceeds the 200 mg pregnancy guideline, so split servings or smaller labeled drinks are the safer choice when limits matter; see the pregnancy safety guide at Caffeine During Pregnancy: How Much Is Safe? and sum multiple items with the caffeine calculator if you combine drinks.