There is no historical way to measure “since Adam and Eve” literally, so the answer depends on whether you mean a religious creation story or a population estimate. Using the most common modern demographic estimate for all humans who have ever lived, the total is about 117 billion people, with roughly 8 billion alive today.

What that means

That estimate is based on population modeling, not on a count from the biblical Adam and Eve onward. One widely cited source says about 117 billion humans have been born overall, and only about 7% are living now.

Why the number varies

Older estimates were lower, around 105 to 106 billion, because they used different assumptions about early population size and birth rates. Newer estimates moved higher as researchers revised assumptions about ancient human populations and long-term birth trends.

Simple takeaway

If you want the shortest answer: about 117 billion humans have ever been born on Earth. If you mean it strictly from the Adam and Eve story, there is no verifiable scientific number for that.