how many blocks in a km
up vote 1 down vote. 1 km is 1000 minecraft blocks. I tried creating a circular track, like so: However this did not work, as the achievement states you must travel 1000 blocks from your starting point.So, the only reasonably viable method to the achievement would be this:ach block is the equivalent of one meter. Given that there is 1000 meters in 1 kilometers, you would have to build a track that spans 1000 blocks in one direction. share | improve this answer.