An average cup of coffee contains 95mg of caffeine, but some types contain over 500mg. That’s important to be aware of when breastfeeding as it’s generally considered safe to drink up to 300 mg per day— about 2–3 cups of coffee or 3–4 cups of tea.
The caffeine content of coffee depends on many factors, such as:
• Type of coffee beans: different varieties of coffee beans naturally contain different amounts of caffeine.
• Roasting: Lighter roasts have more caffeine than darker roasts.
• Type of coffee: caffeine content can vary significantly between regularly brewed coffee, espresso, instant coffee and decaf coffee.
• Serving size: “One cup of coffee” can range anywhere from 30–700 ml (1–24 oz), greatly affecting the total caffeine content.
• One cup of brewed coffee (8 oz) contains about 70–140 mg of caffeine, or about 95 mg on average
• One shot of espresso is generally about 30–50 ml (1–1.75 oz), and contains about 63 mg of caffeine
• Instant coffee usually contains less caffeine than regular coffee, with one cup containing roughly 30–90 mg
• Decaf has about 0–7 mg per cup, with the average cup containing 3 mg