In order to end up with a good looking floor, you need to avoid installing little pieces at either end of the room, and avoid regular patterns which make the seams stand out.
Calculate a SEAMLESS ZONE; a range of starting plank lengths to avoid because they result in short pieces on the opposite wall. Randomize your starting board lengths shorter or longer than the SEAMLESS ZONE to keep your floor looking good.
Your starting boards need to be either:
SEAMLESS ZONE method 1:
Start clicking boards together, end-to-end, beginning on the far right corner of your starting wall
Continue extending your row of boards until it extends from wall to wall parallel with how you plan to lay your floor
When you run out of room to lay a full plank, measure the gap remaining
Put a piece of tape on the wall to mark the END OF THE SEAMLESS ZONE
Put another piece of tape on the wall, 8″ further to the left. This marks the START OF THE SEAMLESS ZONE
Unclick the row of boards. You’ll need them later
SEAMLESS ZONE method 2:
Measure the length of the room parallel with the starting wall
Measure the length of your flooring planks
Divide the length of the room by the length of your flooring planks. Round this number down to the nearest whole number to find the number of whole planks to cross the room
Multiply the number of whole planks to cross the room by the length of your flooring planks to find the total full-plank length
Subtract the total full-plank length from the length of the room.
Subtract 8″ from the END OF THE SEAMLESS ZONE to find the START OF THE SEAMLESS ZONE