What a Clone Contains

Cloning a repository downloads two things: the current working tree and the entire .git object database. This git repository size calculator estimates the clone size as working tree (files × average size) plus packed history (commits × average change size × compression factor).

Why History Dominates

Every commit stores a snapshot of the changes it introduced. Git delta-compresses similar versions and zlib-compresses everything, but repositories with long histories, generated artifacts, or committed binaries grow without bound — history rarely shrinks once pushed.

Keeping Repos Lean

Use .gitignore aggressively, keep binaries in package registries or object storage, and prune history with filter-repo when it bloats. CI caches and shallow clones for ephemeral jobs reduce the download cost further.