Espresso Caffeine: How Much is in Your Shot?
A single 30 ml espresso shot contains 63 mg of caffeine.
- Single espresso (30 ml) = 63 mg of caffeine.
- Double espresso (60 ml) = 126 mg, equal to many 240 ml brewed coffees.
- After ~6 hours about 48% of the dose remains—so 63 mg → ~30 mg; 126 mg → ~60 mg.
- FDA guidance: healthy adults generally limit to 400 mg/day; pregnancy guidance is ~200 mg/day.
Caffeine in single espresso shots
The standard single espresso (30 ml) in the dataset contains 63 mg of caffeine. Ristretto is concentrated by volume but not by caffeine mass here: the dataset lists a 20 ml ristretto at the same 63 mg, meaning extraction differences concentrate flavor but the shot’s total caffeine can match a standard espresso.
Why 30 ml matters
Espresso volume describes water used, not caffeine yield alone; grind, dose of roasted coffee, tamping, and extraction time determine the 63 mg result recorded in FoodData–style measurements. For reference, the dataset also lists a Starbucks Blonde espresso shot at 85 mg per 30 ml — lighter roast but different dose or roast profile produces more caffeine.
Double espresso caffeine levels
A double espresso (60 ml) in the dataset contains 126 mg of caffeine — exactly twice the single-shot value because it’s two shots. That matches menu logic: two standard shots = two times the caffeine mass.
When a double isn't exactly double
Some cafés pull a single long shot or a higher-dose single (e.g., Blonde) that changes the math. If a café uses a higher dose per shot, the double will exceed 126 mg. Check chain nutrition facts or track shots in an app like CoffeeLog to be precise.
How espresso compares to other coffee drinks
Espresso delivers caffeine densely by volume but many brewed drinks contain equal or more caffeine by serving. Below are direct comparisons from the dataset.
| Drink (serving) | Volume | Caffeine (mg) |
|---|---|---|
| Espresso (single) | 30 ml | 63 mg |
| Espresso (double) | 60 ml | 126 mg |
| Ristretto | 20 ml | 63 mg |
| Americano | 240 ml | 126 mg |
| Latte | 240 ml | 68 mg |
| Drip coffee | 240 ml | 96 mg |
| Pour over | 240 ml | 145 mg |
| Cold brew | 240 ml | 200 mg |
| Starbucks Blonde espresso (shot) | 30 ml | 85 mg |
Practical takeaway: an Americano made with a double shot equals 126 mg in 240 ml — same caffeine as a double espresso but more volume and milder taste. Cold brew and some large brewed coffees often beat espresso for total caffeine per serving.
Factors that affect espresso caffeine
Extraction variables that change caffeine mass per shot include:
- Grind and dose: more grounds → more total caffeine available.
- Extraction time and temperature: under-extraction can leave caffeine behind, but typical espresso temperatures extract most soluble caffeine.
- Bean variety and roast: lighter roasts can register slightly higher caffeine by mass; the dataset shows a Blonde ristretto/shot at 85 mg versus 63 mg for the standard shot.
Chain differences
Chains publish nutrition: Starbucks, Dunkin', Tim Hortons and others appear in the dataset — their grande/medium sizes vary widely (e.g., Starbucks Caffè Americano Grande 473 ml = 225 mg), so use published labels or CoffeeLog to log exact values.
How long espresso caffeine lasts in your body
Caffeine elimination follows a population-average half-life of about 5.7 hours (population average). Rough decay percentages to use: after 3 h ≈ 69% remain, 6 h ≈ 48%, 9 h ≈ 33%, 12 h ≈ 23%.
| Time after dose | Single espresso (63 mg) | Double espresso (126 mg) |
|---|---|---|
| 0 h | 63 mg | 126 mg |
| 3 h (~69% remain) | ~43 mg | ~87 mg |
| 6 h (~48% remain) | ~30 mg | ~60 mg |
| 9 h (~33% remain) | ~21 mg | ~42 mg |
| 12 h (~23% remain) | ~14 mg | ~29 mg |
Interpretation: a double pulled at 6 pm will leave roughly 60 mg of caffeine at midnight—enough to disturb sleep in sensitive people. Individual metabolism varies: CYP1A2 genetics, smoking, some drugs, pregnancy, and age alter the half-life; authoritative sources include the FDA, Mayo Clinic and EFSA.
Health considerations and safe limits
For healthy adults the FDA reference is up to 400 mg/day of caffeine. For pregnancy major bodies (FDA, EFSA, and many obstetric guidelines) advise limiting to around 200 mg/day. The American Academy of Pediatrics discourages routine caffeine use in adolescents.
Warnings: overdose symptoms (nausea, rapid heartbeat, severe anxiety) require medical attention. Caffeine withdrawal can cause headaches and low mood. This page is informational and not medical advice — consult your clinician for personal recommendations.
Practical timing, sleep and tracking
To avoid sleep disruption, stop consuming caffeine several half-lives before bedtime depending on sensitivity. If you’re tracking totals across multiple drinks and days, logging each shot and beverage in CoffeeLog gives accurate daily totals and warns you when you approach limits like 400 mg.
Final note: know the exact shot type at your café. A Blonde shot can be 85 mg; a standard single is 63 mg. When precision matters, use chain nutrition facts, USDA FoodData Central entries, or measure in an app designed for caffeine tracking.
Frequently asked questions
How much caffeine is in an espresso shot?
A standard single 30 ml espresso shot contains 63 mg of caffeine (dataset value). Some shots, like Starbucks Blonde, are higher (85 mg per 30 ml).
Is a double espresso twice the caffeine of a single?
Yes in the dataset a double (60 ml) is 126 mg—exactly twice the single 63 mg—provided both shots use the same dose and extraction.
How does espresso compare to drip coffee for caffeine?
Per 240 ml serving, drip coffee in the dataset is 96 mg while espresso double (60 ml) is 126 mg; brewed methods like pour-over (145 mg) or cold brew (200 mg) can exceed espresso for total mg.
How long does espresso caffeine stay in my system?
Using a 5.7-hour half-life: about 69% remains at 3 h, 48% at 6 h. From 63 mg → ~30 mg at 6 h; from 126 mg → ~60 mg at 6 h. Individual metabolism varies.
Is espresso safe during pregnancy?
Guidance from authorities recommends limiting caffeine to about 200 mg/day during pregnancy. Two singles (126 mg) would fall under that, but consult your clinician before consuming caffeine while pregnant.
Can espresso keep me awake at night?
Yes—because ~48% of the dose remains after 6 hours, a late-evening double (126 mg) can leave ~60 mg at midnight, enough to disrupt sleep in sensitive people; avoid late caffeine if you’re sensitive.