One physicist calculated that the internet weighs about as much as a strawberry

The internet feels like the heaviest thing humans have ever built — millions of servers, undersea cables, whole warehouses of spinning drives. So how much does it actually weigh? By one famous calculation, the answer is about 50 grams. Roughly a strawberry.

The number comes from the physicist Russell Seitz, who asked a deceptively simple question: not how much the machines weigh, but how much the electrons weigh — the tiny particles in motion that actually carry the internet's data. Electrons have mass, just an almost unimaginably small one. Add up all the ones flowing through the world's servers to keep the network running, and Seitz worked out they come to around 50 grams — the weight of one plump strawberry.

By Seitz's sum, that's the whole live internet: every video, every message, every photo, moving as electrons that together weigh about as much as a strawberry.

For comparison, four very different "weights of the internet":

• The electrons in motion: ~50 g — a strawberry (Seitz's figure)
• The power they carry: ~40 gigawatts of electricity
• The physical hardware: millions of tons of servers, cables and concrete
• The stored data itself: by another calculation, a tiny fraction of a single gram

Here's the honest catch: this isn't a settled fact, it's a back-of-envelope thought experiment, and it depends entirely on what you decide to weigh. Seitz's 50 grams counts the electrons keeping the live network powered. Weigh only the stored information and, by one calculation, the number collapses to less than a trillionth of a gram. Weigh the actual steel and silicon and it's millions of tons. Other physicists have called Seitz's method flat wrong. And since he did the sum back in 2006, the internet has ballooned — so the "electrons" figure today would be higher, more of a potato than a strawberry.

But as a way to feel something strange and true — that the entire digital world rides on particles so light they barely register — the strawberry is perfect.

By one physicist's reckoning, everything humanity has put online rides on electrons that weigh less than your breakfast.