Maxwell House Coffeeのカフェイン含有量：完全ガイド

Caffeine Content Overview for Maxwell House Coffees

Maxwell House does not publish a single universal caffeine number for every product and cup size. To answer "how much caffeine in Maxwell House" we use standard beverage benchmarks: U.S. drip coffee averages 96 mg per 240 ml (dataset value). Instant coffee averages 62 mg per 240 ml; decaf averages 3 mg per 240 ml. Those dataset values are the best direct comparisons for Maxwell House ground, instant, and decaf products.

Authoritative databases such as USDA FoodData Central list wide variation in brewed coffee caffeine depending on bean, roast and extraction; regulatory guidance from the FDA and EFSA sets intake limits rather than per-cup rules.

Common Maxwell House formats — estimated caffeine table

The table below pairs Maxwell House product types with close dataset benchmarks. Labels marked "estimate" are derived from the matching dataset item (drip, instant, decaf) rather than a Maxwell House-specific lab result.

Regular Maxwell House coffee — what to expect

When people ask "how much caffeine in Maxwell House", they usually mean a standard brewed cup. Use the dataset benchmark for U.S. drip: 96 mg per 240 ml. Real-world cups will vary: a larger mug (350–473 ml) multiplies the total caffeine proportionally, and stronger extraction or finer grind increases concentration.

Factors that change the number

• Serving size: a 473 ml cup at the same strength would contain roughly double the caffeine of a 240 ml cup.
• Brew strength and ratio: more coffee per water increases mg per ml; pour-over and Cold Brew methods often yield higher mg/100 ml.
• Roast level: darker roasts are slightly less dense by bean weight, but extraction and grind matter more than roast for final caffeine in the cup.

Decaf and half-caff explained

Maxwell House decaf will still contain a trace of caffeine consistent with the decaf dataset: about 3 mg per 240 ml. "Half-caff" blends aim for roughly half the caffeine of the comparable regular brew — using the 96 mg benchmark, half-caff would be an estimate of ~48 mg per 240 ml, but formulations vary.

How Maxwell House compares to other brands and formats

Comparing to common commercial benchmarks helps set expectations: Starbucks Pike Place (large 473 ml) is listed at 310 mg, Dunkin' medium brew at 210 mg (414 ml), and McDonald's medium brewed coffee at 145 mg (473 ml) in the dataset. Maxwell House brewed at 240 ml (~96 mg) sits on the lower end of these chain offerings per serving because many chains serve larger sizes or stronger extractions.

Caffeine decay: how long Maxwell House caffeine stays in your body

Population-average caffeine half-life is about 5.7 hours; an approximate rule of thumb (dataset guidance) gives remaining fractions: 3 h ≈ 69%, 6 h ≈ 48%, 9 h ≈ 33%, 12 h ≈ 23%. Below is the decay table from common serving benchmarks.

Practical takeaway: a 240 ml Maxwell House cup at 8 p.m. still leaves ~46 mg at 2 a.m. (6 hours later), which can affect sleep for sensitive people. Many clinicians recommend avoiding caffeine 6–8 hours before bedtime.

Health, safety and tracking

Federal and professional guidance: the FDA cites up to 400 mg per day as a reasonable limit for healthy adults; pregnancy guidance is commonly ~200 mg per day. The American Academy of Pediatrics discourages caffeine use in adolescents. For anxiety, insomnia, or cardiac concerns consult a clinician; these are information notes, not medical advice.

If you want precise daily totals, use a tracker — CoffeeLog can record cup size and product type and apply dataset benchmarks so you see total mg/day and timing effects automatically.

Final notes and reliable sources

Maxwell House cups will usually line up with the dataset benchmarks: brewed ≈ 96 mg per 240 ml, instant ≈ 62 mg, decaf ≈ 3 mg. For specific product labels or exact lab numbers rely on manufacturer statements or USDA FoodData Central. Regulatory and health guidance comes from the FDA, EFSA and clinical groups like the Mayo Clinic and American Academy of Pediatrics.

Use these numbers to compare formats, plan intake against the FDA daily limit, and schedule drinks to protect sleep. For ongoing tracking, log servings by size in an app like CoffeeLog to convert cups into precise daily caffeine totals.

How much caffeine is in a larger Maxwell House mug (350–500 ml)?

A 350 ml mug of Maxwell House brewed coffee contains about 140 mg of caffeine; a 473 ml (16 oz) mug contains about 189 mg. Those numbers come from scaling the U.S. drip-brew benchmark of 96 mg per 240 ml reported by the USDA FoodData Central.

Scaling is proportional: caffeine in a cup is the per-milliliter concentration times the serving size. Proportional scaling is D_new = D_ref × (V_new / V_ref), where D_ref is 96 mg at V_ref 240 ml.

Example arithmetic: 96 mg × (350 ml / 240 ml) = 96 × 1.4583 ≈ 140 mg; 96 mg × (473 ml / 240 ml) = 96 × 1.9708 ≈ 189 mg; 96 mg × (500 ml / 240 ml) = 96 × 2.0833 ≈ 200 mg, using the USDA FoodData Central benchmark for drip coffee.

Use the site calculator to do this math automatically: try our caffeine half-life calculator to convert any cup into mg and track accumulation over the day.

What happens if I combine Maxwell House brewed coffee with a cold brew or energy drink?

If you drink a 240 ml Maxwell House brewed cup (96 mg) and a 240 ml cold brew (200 mg) within a short time, your combined dose is 296 mg immediately after consumption. The combined dose is the simple sum: 96 mg + 200 mg = 296 mg (dataset benchmarks).

First-order elimination is a process where the amount of caffeine decreases proportionally over time according to a half-life. Using a population-average half-life of 5.7 hours, remaining mg after t hours = D × 0.5^(t / 5.7).

Apply the math to 296 mg: after 3 hours ≈ 296 × 0.69 ≈ 204 mg remaining; after 6 hours ≈ 296 × 0.48 ≈ 142 mg remaining; after 9 hours ≈ 296 × 0.33 ≈ 98 mg remaining (half-life model and percentages per the dataset guidance).

If you are tracking total daily load against intake limits, remember the U.S. FDA cites up to 400 mg per day as a reasonable limit for healthy adults, so a 296 mg combined dose uses most of that single-day allowance in one sitting (FDA).

How do medications, smoking and hormones change how long Maxwell House caffeine stays in my body?

Common factors can meaningfully speed up or slow down caffeine clearance; for example, smoking tends to speed clearance while estrogen-containing birth control pills tend to slow clearance, according to the Mayo Clinic. Those changes alter effective half-life and therefore how long a 96 mg cup affects you.

CYP1A2 is the liver enzyme primarily responsible for caffeine metabolism. Variations in CYP1A2 activity from genetics, smoking, or drugs will change how quickly caffeine falls according to the same first-order model (so the 5.7-hour population average is only a starting point).

The Mayo Clinic lists prescription drugs, over-the-counter medications and lifestyle factors that interact with caffeine metabolism; consult that resource when you take antidepressants, antibiotics or hormonal medications, because interactions can increase side effects or prolong stimulant effects (Mayo Clinic).

To translate this into practical tracking, log the product and any relevant medications in a diary or app: our caffeine half-life calculator can show how a slower or faster apparent half-life changes remaining mg over time when you adjust the half-life input.

When should I stop drinking Maxwell House to protect my sleep?

To reduce sleep disruption, avoid caffeine roughly 6 hours before your planned bedtime; a 240 ml Maxwell House brewed cup (96 mg) consumed 6 hours before sleep leaves about 46 mg in your system at lights-out based on the 5.7-hour half-life. The impact on sleep from late afternoon caffeine is supported by clinical sleep research showing significant reductions in total sleep time when caffeine is taken 6 hours before bedtime (Drake et al., 2013).

Sleep onset latency is the time it takes to fall asleep. If you normally go to bed at 11:00 pm, having a 240 ml Maxwell House cup at 5:00 pm (6 hours earlier) results in 96 mg × 0.5^(6/5.7) ≈ 96 × 0.48 ≈ 46 mg remaining at 11:00 pm, which can meaningfully shorten sleep for sensitive individuals (Drake et al., 2013).

Use our latest cup before bed tool to calculate the recommended cutoff for your bedtime, or run the numbers manually with the caffeine half-life calculator to see how different serving sizes change remaining mg at sleep time.

How do I estimate caffeine when I brew Maxwell House stronger or use pour-over or French press methods?

Different brewing methods concentrate different amounts of caffeine per 240 ml: pour-over benchmarks at 145 mg per 240 ml and French press at 107 mg per 240 ml in the dataset, so a stronger extraction will raise mg per serving. Use the dataset method value closest to your brew to estimate your cup’s caffeine.

Extraction yield is the percentage of soluble coffee compounds extracted into water during brewing. If you brew a 350 ml pour-over, scale the pour-over benchmark: 145 mg × (350 / 240) = 145 × 1.4583 ≈ 211 mg; for a 350 ml French press: 107 mg × (350 / 240) = 107 × 1.4583 ≈ 156 mg; compare to a 350 ml drip cup at 96 mg × 1.4583 ≈ 140 mg (dataset benchmarks reported by the USDA FoodData Central).

Practical steps to reduce caffeine per cup include using less coffee per water (lower brew ratio) or choosing decaf; for precise home adjustments consult our coffee brewing measurements guide and the coffee brewing ratio calculator to convert your grind, weight and water into expected mg estimates.

Bottom line

Maxwell House brewed coffee aligns with the U.S. drip benchmark of about 96 mg per 240 ml (USDA FoodData Central), instant matches ~62 mg per 240 ml, and decaf ~3 mg per 240 ml; cold brew and nitro cold brew are much stronger at ~200 mg and ~215 mg per 240 ml respectively (dataset benchmarks). Use proportional scaling to convert any cup size: mg_new = mg_ref × (volume_new / 240 ml).

Caffeine follows first-order elimination with a population-average half-life of 5.7 hours (342 minutes); remaining mg after t hours = D × 0.5^(t / 5.7). The U.S. FDA sets an upper reasonable daily limit of 400 mg for healthy adults (FDA), and the EFSA 2015 opinion recommends a 200 mg single dose and 200 mg/day in pregnancy (EFSA 2015). For sleep planning, clinical sleep research found that caffeine taken 6 hours before bedtime can cut total sleep time substantially, so avoid late afternoon caffeine if you are sensitive (Drake et al., 2013).

For hands-on use: calculate cup mg with the per-format benchmarks (96 mg drip, 62 mg instant, 3 mg decaf), scale by your cup volume, and then apply the half-life formula or our caffeine half-life calculator and last cup before bed tool to see mg remaining at any future time; if you want intake guidance by weight or health status, consult our safe daily limit tool and the caffeine dosage guide for context.