Espresso Caffeine: How Much Caffeine Per Shot?
A single 30 ml espresso shot contains 63 mg of caffeine.
- Single espresso (30 ml) = 63 mg caffeine.
- Double espresso (60 ml) = 126 mg.
- Starbucks Blonde espresso shot = 85 mg per 30 ml shot.
- Cold brew (240 ml) can contain up to 200 mg, significantly more than a shot.
- U.S. FDA guidance: healthy adults ≤ 400 mg/day; pregnancy ≈ ≤ 200 mg/day.
Caffeine in a single espresso shot
The standard single espresso listed in authoritative datasets is 30 ml with 63 mg of caffeine. That number reflects the extracted caffeine in a typical pull, not the coffee bean weight or roast. Because espresso is concentrated, its caffeine-per-milliliter is high, but the serving size (30 ml) keeps the absolute dose modest compared with a full cup of brewed coffee. Sources for portion values include USDA FoodData Central and manufacturer disclosures compiled into public caffeine datasets.
Multiple-shot caffeine levels and specialty shots
Espresso shots scale linearly by dose: a double shot (60 ml) is 126 mg (exact double of a single), and a triple would be three times the single shot. Some variants change the dose per shot: a Blonde espresso shot in the dataset is 85 mg for 30 ml—about 35% higher than a standard single, so always check the roast/shot type when estimating intake. Ristretto (20 ml) is listed at 63 mg — less volume but similar caffeine because extraction concentrates compounds differently.
Practical examples
| Drink / serving | Volume | Caffeine (mg) |
|---|---|---|
| Espresso (single) | 30 ml | 63 |
| Espresso (double) | 60 ml | 126 |
| Starbucks Blonde Espresso (shot) | 30 ml | 85 |
| Ristretto | 20 ml | 63 |
| Americano | 240 ml | 126 |
| Latte (240 ml) | 240 ml | 68 |
| Flat white | 160 ml | 130 |
| Mocha (240 ml) | 240 ml | 95 |
| Drip coffee | 240 ml | 96 |
| Pour over | 240 ml | 145 |
| Cold brew | 240 ml | 200 |
| Decaf coffee | 240 ml | 3 |
How espresso compares to other coffee types
Two ways to compare caffeine: per-milliliter concentration and per-serving dose. Espresso has high concentration but small serving sizes; a single espresso (63 mg) has less caffeine than a 240 ml pour-over at 145 mg or cold brew at 200 mg. A double shot in an Americano delivers 126 mg while a 240 ml latte commonly contains 68 mg because milk dilutes the per-cup caffeine.
How caffeine decays after an espresso shot (half-life math)
Caffeine elimination follows an exponential decay; population-average half-life is about 5.7 hours. That means remaining caffeine ≈ starting dose × 0.5^(t/5.7). Below are rounded amounts using that decay for common doses.
| Dose | 0 h | 3 h (~69%) | 6 h (~48%) | 9 h (~34%) | 12 h (~24%) |
|---|---|---|---|---|---|
| Espresso (63 mg) | 63 mg | 44 mg | 30 mg | 21 mg | 15 mg |
| Double espresso (126 mg) | 126 mg | 87 mg | 61 mg | 43 mg | 30 mg |
| Blonde shot (85 mg) | 85 mg | 59 mg | 41 mg | 29 mg | 20 mg |
| Cold brew (200 mg) | 200 mg | 139 mg | 97 mg | 68 mg | 47 mg |
Use the decay table to plan timing. For example, a 63 mg espresso leaves about 30 mg after ~6 hours; if you drink multiple shots spaced close together, doses add and clearance slows the reduction of total circulating caffeine.
What affects caffeine in an espresso shot
Key variables: bean species and blend (Arabica vs. Robusta), roast (Blonde/Light roasts often register higher per-shot numbers in datasets), grind size and tamping (finer grind, longer contact = more extraction), dose of grounds per shot, and machine/pressure. A ristretto uses less water but can extract similar total caffeine because extraction efficiency changes; that's why the dataset lists ristretto and single espresso at the same 63 mg despite smaller volume.
Health, safety, timing vs sleep
Regulatory and clinical guidance: the U.S. FDA and EFSA identify about 400 mg/day as safe for most healthy adults; pregnancy guidance commonly recommends limiting intake to ≈200 mg/day. The American Academy of Pediatrics discourages caffeine for adolescents. High acute doses risk palpitations, anxiety, or insomnia. If you have heart disease, are pregnant, or take drugs that affect caffeine metabolism, consult a clinician before regular high intake.
To protect sleep, avoid espresso shots within 6–8 hours of planned bedtime: with a 63 mg shot, ~30 mg remains at 6 hours—enough to disrupt sensitive sleepers. Use the decay table above to estimate residual caffeine relative to your sleep window.
How to track and practical tips
Track shots and total mg per day rather than cups. Tools like CoffeeLog automate per-drink mg totals and sum your daily intake so you can see when you exceed 200 mg (pregnancy) or 400 mg (general guideline). Practical rules: order a single (63 mg) instead of a double if you’re spacing drinks, prefer brewed 240 ml pour-over (145 mg) to hit an exact target, and ask the barista about Blonde or single-origin shots, which can change mg per shot.
Medical caution: this page is informational only and not medical advice. For pregnancy, cardiac conditions, or medication interactions, consult a healthcare professional before changing caffeine habits; authoritative sources include the FDA, EFSA, Mayo Clinic, and the American Academy of Pediatrics.
Frequently asked questions
How much caffeine is in a single espresso shot?
A standard single espresso (30 ml) contains 63 mg of caffeine according to the dataset. Specialty shots like Starbucks Blonde list 85 mg for 30 ml.
Is a double espresso exactly twice the caffeine of a single?
Yes: the dataset lists a double (60 ml) at 126 mg, exactly double a 63 mg single. Practical variations occur by roast and extraction.
How long does espresso caffeine stay in your system?
Using a population-average half-life of 5.7 hours, about 69% remains at 3 hours and ~48% at 6 hours; a 63 mg shot leaves ~30 mg after 6 hours.
How many espresso shots are safe per day?
For most healthy adults, the FDA and EFSA suggest ≤400 mg/day — roughly three single shots (3×63 mg ≈ 189 mg) leaves room for other sources. Pregnancy guidance is about ≤200 mg/day.
Will a single espresso keep me awake?
Sensitivity varies. A 63 mg shot can disrupt sleep in sensitive people if taken within 6–8 hours of bedtime because residual caffeine remains; use the decay table to plan timing.
Can I track espresso caffeine automatically?
Yes. Apps like CoffeeLog let you log drink types and automatically sum mg per serving and per day, helping you stay within FDA/EFSA guidance or personal limits.