How Long Does LEGO® Robot Inventor (51515) Take to Build?

A typical builder finishes LEGO® Robot Inventor (set 51515, 949 pieces) in about 3 hours. Taking it slowly runs closer to 4 hours; building at a fast pace, about 2 hours 15 minutes.

PieceTick estimates build time from piece count, part complexity, the set’s age rating, your experience level, and how you sort pieces. Adjust those on this page for an estimate matched to how you build.