Pour overに含まれるカフェイン量はどれくらい？

A 240 ml (8.1 fl oz) serving of pour over coffee contains 145 mg of caffeine. This concentration, 60.4 mg per 100 ml, places it well above the average drip coffee (96 mg per 240 ml) and signals a more efficient extraction of the ground beans. For a person accustomed to a standard cup of coffee, this pour over delivers roughly 1.5 times the caffeine punch.

At 145 mg, the dose accounts for 36% of the 400 mg daily limit for healthy adults set by the U.S. Food and Drug Administration. The stimulant effect begins within 15 to 45 minutes after drinking, peaks around 30 to 60 minutes, and yields a state of heightened alertness, improved concentration, and a temporary lift in mood. For most individuals, this is a moderate dose, but it is substantial enough to produce noticeable effects without the jitteriness that can accompany higher amounts.

Understanding this number in context is the first step toward using it wisely. The following sections unpack how long the caffeine stays with you, how this drink stacks up against other brewed coffees, and what the science says about timing your last cup.

Pour overが体内にどれくらい残るか

How Long Does 145 mg of Caffeine Stay in Your System?

Caffeine is eliminated from the body by a first-order process, meaning a constant fraction is removed per unit of time. The population-average half-life for caffeine is 5.7 hours. For a 145 mg dose, you can calculate the remaining caffeine after any number of hours using the formula: remaining = 145 × 0.5^(hours / 5.7). Applying this math yields the following decay curve: after 3 hours, approximately 101 mg remains; after 6 hours, 70 mg; after 9 hours, 49 mg; and after 12 hours, 34 mg still circulates in the bloodstream. Even a small residual amount can compete with adenosine receptors and delay the onset of natural drowsiness.

If you drink a pour over at 15:00 (3 PM), by 21:00 (9 PM) you have about 70 mg of caffeine still active — roughly equivalent to a small energy drink. By midnight, 49 mg remains, enough to interfere with sleep architecture. The caffeine half-life calculator can model your personal clearance based on individual factors like age, liver function, and pregnancy status, which can extend the half-life considerably. For most people, this dose will leave a measurable pharmacological effect for 10–12 hours.

Timing Your Pour Over for Sleep and Safety

The 145 mg caffeine dose represents 36% of the FDA’s 400 mg daily ceiling for healthy adults. That means you could drink two full pour overs (290 mg) and still have 110 mg of headroom for other sources such as tea, soda, or chocolate. Three pour overs, however, would total 435 mg and exceed the recommended limit. For most people, the safe upper bound is two cups per day. The safe daily limit calculator can adjust this threshold based on your body weight, as the tolerable intake is often expressed as 2.5–4 mg per kilogram of body weight per day.

Sleep disruption is a more immediate concern. The half-life model shows that even 6 hours after drinking, 70 mg of caffeine remains. If your bedtime is 23:00, consuming a pour over after 17:00 (5 PM) leaves you with roughly 70 mg at 23:00, which can delay sleep onset and reduce deep sleep stages. The Drake et al. study (2013) found that 400 mg of caffeine consumed 6 hours before bed still caused significant sleep disruption. With a 145 mg dose, the effect is smaller but still present. The latest cup before bedtime tool can help you set a personal cutoff time based on your desired wind-down window.

Special populations need to be more cautious. The European Food Safety Authority recommends that pregnant women limit daily caffeine intake to 200 mg. One pour over uses up 145 mg of that allotment, leaving only 55 mg for the rest of the day. For adolescents, Health Canada advises a maximum of 2.5 mg per kg of body weight; a 50 kg teenager would have a limit of 125 mg, so a single pour over exceeds that. Individuals with slow caffeine metabolism (due to genetic variants in the CYP1A2 enzyme) or those taking certain medications may experience prolonged effects and should consider smaller servings or earlier cutoff times.

How Does Pour Over Compare to Other Coffees?

Within the brewed coffee category, pour over’s 145 mg per 240 ml places it firmly in the upper-middle tier. Standard drip coffee delivers 96 mg, while French press comes in at 107 mg. Both are notably lower because their extraction methods, while effective, do not achieve the same level of caffeine removal as the continuous, controlled pouring of water through a bed of grounds. On the other hand, cold brew at 200 mg and nitro cold brew at 215 mg are substantially stronger. Those methods use extended steeping times (12–24 hours) and often a higher coffee-to-water ratio, resulting in a concentrate that packs more caffeine per unit volume.

Compared to espresso, pour over is a study in concentration versus total dose. A single espresso (30 ml) contains 63 mg, meaning its caffeine density is 2.1 mg per ml — far higher than pour over’s 0.60 mg per ml. Yet a typical pour over serving is eight times larger, so the total caffeine load is more than double that of a single espresso shot. In fact, a 240 ml pour over (145 mg) contains more caffeine than two espresso shots (126 mg), making it a more substantial source of stimulation for those who compare coffee drinks by total volume.

When evaluated against common ready-to-drink beverages, the pour over is also competitive: a 250 ml can of Red Bull has 80 mg, and a 473 ml can of Monster Energy has 160 mg. So your morning pour over delivers almost twice the caffeine of a small energy drink, without the added sugars and taurine. This context helps you gauge where this drink fits in your daily caffeine budget.

Pour overの数値を左右する要素

What Affects the Caffeine Content in a Pour Over?

The 145 mg figure is a representative value for a medium-strength pour over brewed with a 1:16 coffee-to-water ratio (15 grams of coffee to 240 ml of water) using a medium roast, finely ground in a conical burr grinder, and extracted with water just off the boil (around 93–96°C). However, pour over caffeine content is not fixed; it varies with several controllable factors. The actual amount in your cup can range from roughly 100 mg to 180 mg for the same 240 ml serving, depending on how you brew.

Key variables that drive this variation include:

• Coffee-to-water ratio: A stronger ratio, such as 1:14, increases the caffeine concentration because more coffee grounds are used per unit of water. Conversely, a weaker 1:18 ratio yields a lower caffeine brew.
• Grind size: Finer grinds expose more surface area to water, speeding up extraction and typically raising the caffeine yield. Coarser grinds slow extraction and can leave caffeine behind.
• Water temperature: Hotter water extracts caffeine more efficiently. Brewing with water below 90°C may result in a noticeably lower caffeine content.
• Brew time: A longer pour, where water remains in contact with the grounds for 3–4 minutes, extracts more caffeine than a quick 2-minute pour.
• Roast level: Light roasts retain slightly more caffeine per bean because roasting degrades a small amount of caffeine. However, the difference is marginal (roughly 5–10%) and often offset by the fact that dark roasts are less dense, so a scoop of dark roast contains fewer beans by weight.
• Coffee variety: Arabica beans contain about half the caffeine of Robusta beans. A pour over made with 100% Arabica will be on the lower end of the spectrum, while a blend with Robusta can push the number higher.

Serving size is another major factor. Many coffee shops serve a “small” pour over as 12 fl oz (355 ml), which holds approximately 215 mg of caffeine (145 × 355/240). A 16 fl oz (473 ml) serving would contain around 286 mg — approaching the single-dose limit of 200 mg suggested by the European Food Safety Authority for sensitive individuals. Always check the volume to avoid accidental over-consumption.

If you choose a decaf version, the pour over will contain only trace caffeine. Decaf coffee beans, by regulation, must have at least 97% of caffeine removed. A 240 ml decaf pour over typically contains 2–4 mg of caffeine, similar to the 3 mg reported for decaf coffee in our dataset. This is negligible for most people but may still be relevant for those with extreme caffeine sensitivity.

この数値の出典

Where Does the 145 mg Figure Come From?

The 145 mg value is derived from laboratory analyses of pour-over coffee brewed under controlled conditions and reported in the USDA FoodData Central database. We cross-referenced multiple entries for brewed coffee prepared by the pour-over method, using a 1:16 ratio of medium-roast, ground Arabica beans and water at 93–96°C. The resulting mean caffeine content is 145 mg per 240 ml (60.4 mg per 100 ml). Published values in the scientific literature vary, with some studies reporting as low as 120 mg and others as high as 180 mg for the same volume, reflecting differences in bean origin, roast, and exact brewing technique. We selected a representative median that aligns with typical home and café practices.

Our dataset is open and version-controlled; you can explore the raw data and methodology on the open caffeine dataset page. If new evidence from a peer-reviewed study or a large-scale survey emerges that consistently points to a different average, we will update the figure. The half-life model is based on the population pharmacokinetics of caffeine, with an average elimination half-life of 5.7 hours, as used in clinical pharmacology. This transparency ensures that the number you see is not an arbitrary claim but a data-driven estimate grounded in the best available evidence.

結論

Bottom Line

A 240 ml (8.1 fl oz) pour over coffee contains 145 mg of caffeine, which is 36% of the 400 mg daily limit for healthy adults. It is about 1.5 times stronger than a typical drip coffee and more potent than a French press, but less intense than cold brew. After 6 hours, 70 mg remains in your system; after 12 hours, 34 mg is still circulating. For most people, two pour overs per day keep intake within the safe range. Pregnant individuals, adolescents, and those with caffeine sensitivity should limit to one cup or less, and avoid drinking it within 8 hours of bedtime to protect sleep quality.