>Drip coffee has even more than espresso [in typical serving sizes].
FTFY.
You need 4 shots of espresso to match the caffeine in 16oz of drip coffee. This does depend on roast; darker roasts have less.
A 16oz or 20oz latte at Starbucks will have 2 shots, i.e. medium roast drip is double, and even a standard 16oz americano at Starbucks only has 3 shots; drip still has 33% more.
Flat Whites are trickier, because despite having an extra shot over lattes (3 in 16oz/20oz), the shots are ristretto (less water), which extract less caffeine.
FTFY.
You need 4 shots of espresso to match the caffeine in 16oz of drip coffee. This does depend on roast; darker roasts have less.
A 16oz or 20oz latte at Starbucks will have 2 shots, i.e. medium roast drip is double, and even a standard 16oz americano at Starbucks only has 3 shots; drip still has 33% more.
Flat Whites are trickier, because despite having an extra shot over lattes (3 in 16oz/20oz), the shots are ristretto (less water), which extract less caffeine.