How much caffeine does coffee have - and how much is safe per day?

Why coffee's caffeine content varies so much (bean, roast, preparation)

How much caffeine does coffee have? It depends on the variety (Robusta ≈ 2× Arabica), grind size, dose, water-to-coffee ratio, contact time, and your machine. Roasting changes the bean weight and solubility, but not significantly the caffeine content per bean.

Caffeine in the beverage: typical values for filter coffee, espresso, cappuccino & cold brew

• Filter coffee (200 ml): approx. 60-120 mg caffeine (filter coffee caffeine content varies greatly)
• Espresso Single (25-30 ml): approx. 40-80 mg; Doppio: 80-160 mg (caffeine espresso mg)
• Cappuccino: same as the espresso shot used (milk dilutes, doesn't change caffeine amount)
• Cold Brew (250 ml): approx. 100-250 mg - highly dependent on concentration (caffeine cold brew)
• Decaffeinated coffee: usually 2-8 mg per cup (caffeine decaffeinated coffee)

How much caffeine per day is considered safe? (Adults, pregnant women, adolescents)

• Adults: up to 400 mg/day are generally considered safe (safe daily caffeine dose).
• Single dose: up to 200 mg at once.
• Pregnancy/Lactation: maximum 200 mg/day (caffeine pregnancy how much).
• Adolescents: approx. 3 mg/kg body weight.

Effect on the body: Adenosine, alertness, sleep and individual tolerance

Caffeine blocks adenosine receptors (caffeine effect adenosine) and thus subjectively increases alertness. Sensitivity varies genetically (CYP1A2), due to habituation and daily condition – which is why people react very differently.

Timing Guide: When is the last coffee advisable (sleep, afternoon, shift work)

Caffeine half-life: approximately 3-7 hours (caffeine half-life). For good sleep: last cup 6–8 hours before bedtime. Shift work: smaller doses early in the shift, no "rescue shots" shortly before sleep.

Reduce caffeine without losing enjoyment: smaller doses, brew parameters, alternatives

• Split dose: several small portions instead of one large one.
• Adjust recipe: lower ratio, coarser grind, shorter contact time.
• Arabica instead of Robusta; light roast for clarity.
• Half-caf (blend with decaf) or tea/malt/chicory coffee.

Specialty Coffee & Transparency: why exact mg figures are rare and how to estimate better

Exact mg values are missing because beans and recipes vary greatly. Better: estimate based on dose, shot size, and brewing recipe (see calculation aid) - or ask the roaster for analysis values.

Brief Conclusion: practical rules of thumb for your daily life

• Filter 200 ml: roughly 60-120 mg; Espresso Single: 40-80 mg.
• How much caffeine per day? Adults up to 400 mg, pregnant women 200 mg.
• Last coffee 6-8 hours before sleep; earlier if sensitive.

Calculation aid: mg caffeine per serving from grams of coffee, ratio and beverage amount

Rule of thumb: mg caffeine ≈ grams of coffee × 8-12 × 0.7-0.9. Example Doppio: 18 g × 10 × 0.8 ≈ 144 mg. A cappuccino with a single shot therefore provides approx. 40-80 mg.

Special cases: caffeine sensitivity, medication, stomach, heart palpitations

In case of high sensitivity, reflux, heart palpitations, pregnancy or medication (e.g., fluvoxamine, ciprofloxacin, hormonal contraceptives), reduce caffeine or consult a doctor.

FAQ

How much caffeine does an average cup of coffee have?

This varies greatly: caffeine levels in roasted coffee and in the beverage are subject to strong fluctuations, as coffee is a natural product. As a rough guide, many cups of filter coffee are often in the range of about 60–120 mg per serving, depending on the quantity, extraction, and bean.

Why does coffee make you awake and why is its effect controversial?

Basically, the health effect of coffee is controversial: Although it has an adenosine-inhibiting effect (an increasing adenosine level throughout the day makes us tired in the evening - no adenosine, no tiredness), it also contains many fibers, etc.

What is the latest time you should drink coffee?

You should pay attention to how you feel personally and, for example, not consume a lot of coffee late in the afternoon. Many benefit from having their last caffeinated portion 6–8 hours before sleep if they are sensitive.

Does espresso have more caffeine than filter coffee?

Per milliliter, espresso is usually more concentrated, but per serving, filter coffee can deliver a similar amount or more caffeine because the drinking volume is larger. Without laboratory analysis, only ranges are meaningful, not exact figures.

Further reading: Guides on recipe development, extraction, and water chemistry deepen the topic of enjoyment with controlled caffeine.