What is the 30 second rule for espresso?
The 30-second extraction rule suggests that a well-balanced espresso shot should take approximately 25-30 seconds to extract when using 18-20 grams of ground coffee and yielding about 30-40 milliliters of espresso. That means 4 to 5 shots of espresso puts you right near the upper safe limit, around 240 to 500 mg total. If your shots are on the stronger side (closer to 100 mg each), hitting that limit only takes about four. If they’re milder, five shots might be okay. Either way, that’s the maximum, not a target.The 10-second rule for espresso is a general guideline that suggests a well-brewed espresso shot should take around 10 seconds to start dripping from the portafilter. However, this rule is not always accurate, as factors such as coffee roast, grind size, and machine temperature can affect the brewing time.For most healthy adults, consuming up to 3–4 shots of espresso per day (189–252 milligrams of caffeine) falls within generally safe limits.Perfect Your Timing Timing is everything in espresso. For a double shot (approximately 2 oz), aim for an extraction time of 18-22 seconds. If your shot pulls too fast (under 18 seconds), you may need to adjust the grind finer or increase the dose.