Cold Brew Coffee: Complete Caffeine Content Guide
A 240 ml serving of cold brew contains 200 mg of caffeine.
- 200 mg — caffeine in a 240 ml standard cold brew (83.3 mg/100 ml).
- 215 mg — caffeine in a 240 ml nitro cold brew (higher extraction or concentrate).
- 96 mg — typical caffeine in 240 ml drip coffee; cold brew (200 mg) is ~2× stronger by mg per serving.
- 400 mg/day is the usual adult upper limit cited by FDA/EFSA; pregnant people are advised to limit to ~200 mg/day.
What is cold brew coffee?
Cold brew is coarsely ground coffee steeped in room-temperature or cold water for extended periods (typically 12–24 hours) and then filtered. Because extraction time and coffee-to-water ratio are high, finished ready-to-drink cold brew often carries more caffeine per 100 ml than hot-brewed methods. Many shops serve either a ready-to-drink strength or a concentrate that is diluted before serving.
Caffeine content across common cold-brew and coffee drinks
This table uses measured servings from authoritative product data to compare common options — include these numbers when planning intake.
| Drink | Serving | Caffeine (mg) | mg / 100 ml |
|---|---|---|---|
| Cold brew (standard) | 240 ml | 200 mg | 83.3 mg/100 ml |
| Nitro cold brew | 240 ml | 215 mg | 89.6 mg/100 ml |
| Drip coffee | 240 ml | 96 mg | 40 mg/100 ml |
| Pour over | 240 ml | 145 mg | 60.4 mg/100 ml |
| Starbucks Cold Brew (Grande) | 473 ml | 205 mg | 43.4 mg/100 ml |
| Dunkin' Cold Brew (Medium) | 710 ml | 260 mg | 36.6 mg/100 ml |
Why cold brew often has more caffeine (factors)
Extraction depends on four controllable variables:
- Grind size — finer grinds extract more quickly; most cold brew uses coarse grind but a long steep time offsets that.
- Coffee-to-water ratio — concentrates (high ratio) mean more mg per serving after dilution if under-diluted.
- Steep time — longer contact (12–24+ hours) increases total extraction including caffeine.
- Roast and origin — darker roasts have slightly less measured caffeine by volume but roast-level differences are smaller than brew method and ratio.
How long cold brew caffeine lasts — decay math and practical timing
Caffeine clearance follows an average half-life of about 5.7 hours for adults. That means caffeine roughly halves every 5.7 hours on average; use this to estimate how much stimulant remains before bed. These numbers are population averages; genetic factors, medications, pregnancy, liver function, and smoking change half-life.
| Time since drinking | Cold brew (200 mg) | Nitro cold brew (215 mg) | Drip coffee (96 mg) |
|---|---|---|---|
| 0 hours | 200 mg (100%) | 215 mg (100%) | 96 mg (100%) |
| 3 hours (~69%) | ~139 mg | ~149 mg | ~67 mg |
| 6 hours (~48%) | ~96 mg | ~104 mg | ~46 mg |
| 9 hours (~33%) | ~67 mg | ~72 mg | ~32 mg |
| 12 hours (~23%) | ~46 mg | ~50 mg | ~22 mg |
Example: a 200 mg cold brew consumed at 4 PM would still deliver roughly 96 mg at 10 PM and about 46 mg by 4 AM — enough to affect sensitive sleepers. Use these decay numbers to schedule last caffeine for adequate sleep latency.
Low-caffeine and caffeine-free cold-brew options
If you want the cold-brew flavor with less caffeine: use decaffeinated beans (dataset: decaf coffee 240 ml ≈ 3 mg), brew with a lower coffee-to-water ratio, or blend half-decaf/half-regular. Herbal iced teas are naturally caffeine-free alternatives. For adolescents, the American Academy of Pediatrics discourages routine caffeine use and warns against energy drinks.
Brewing tips to control caffeine
- Shorten steep time: cut from 18–24 hours to 8–12 hours to lower extraction.
- Use a lower coffee-to-water ratio: fewer grams per liter reduces mg per serving.
- Dilute concentrates properly: many commercial concentrates are meant to be diluted 1:1 or more.
- Track intake: tools like CoffeeLog can log drinks and compute daily totals against limits (FDA/EFSA 400 mg/day; pregnancy ~200 mg/day).
Health, safety, and common limits
Regulatory and clinical authorities provide practical limits: FDA and EFSA commonly cite up to 400 mg/day as a safe upper limit for healthy adults; pregnant people are advised to keep intake near or under 200 mg/day (consult a clinician). For adolescents, avoid energy drinks and be conservative — the American Academy of Pediatrics recommends limiting or avoiding caffeine. If you suspect caffeine overdose (palpitations, severe agitation, vomiting), seek emergency care.
Practical summary
Cold brew is often stronger than hot-brewed drip coffee because of brew ratio and long steep time: a 240 ml serving commonly measures 200 mg. Use dilution, brew time, and bean selection to control strength, and apply the ~5.7-hour half-life to time intake relative to sleep. Track servings and totals with a log (for example, CoffeeLog) to stay within safe limits per FDA/EFSA guidance.
Frequently asked questions
How much caffeine is in a 240 ml cold brew?
A standard 240 ml cold brew contains 200 mg of caffeine according to the dataset; nitro cold brew is slightly higher at 215 mg per 240 ml.
Is nitro cold brew stronger than regular cold brew?
In the dataset nitro cold brew (240 ml) is 215 mg vs 200 mg for standard cold brew, so nitro can be modestly stronger per same serving size.
How long will the caffeine from cold brew affect me?
Using a population half-life of 5.7 hours, roughly 48% remains after 6 hours. For a 200 mg cold brew, about 96 mg remains at 6 hours and ~46 mg at 12 hours.
Can I drink cold brew while pregnant?
Health authorities advise limiting caffeine in pregnancy to about 200 mg/day; a single 240 ml cold brew (200 mg) would meet that limit, so consult your clinician about frequency.
How can I make a lower-caffeine cold brew?
Brew with a lower coffee-to-water ratio, shorten steep time (e.g., 8–12 hours), use decaffeinated beans (≈3 mg/240 ml), or dilute concentrate before serving.
How does cold brew compare to a shot of espresso?
A single 30 ml espresso shot contains 63 mg; two shots (double) are 126 mg. A 240 ml cold brew at 200 mg delivers more total caffeine than a double espresso.