How much floor space do I need for a full dumbbell set?

Verified-purchase reviewers and Facebook home-gym groups consistently flag floor footprint as the biggest hidden cost. A 5–50 lb pair set on a 2-tier A-frame rack typically needs roughly a 4-foot-wide by 2-foot-deep footprint, which is why compact vertical racks and adjustable alternatives keep coming up in r/homegym threads.