Wash and dry the watermelon. On a cutting board, cut the watermelon in half. Cut off the rounded end, close to the red watermelon flesh.
Place the watermelon, cut side (flesh) down on the cutting board. Holding your knife at an angle, slice off the rid and white flesh of the watermelon, starting at the stem cut and working your way down to the cutting board. Cut around the entire watermelon until the rind and white flesh have been removed.
Cut the watermelon in half from the stem side to the middle.
Turn the watermelon, so the last cut is on the cutting board. Slice the watermelon into 1-inch slices. Repeat on the other half of the watermelon. You will have roughly 6-8 slices of watermelon.
Lay one slice of watermelon on the cutting board and cut the watermelon into 1-inch slices.
Turn the watermelon and slice in the opposite direction in 1-inch slices to make cubes.
Repeat until you have cut all of the watermelon slices.
Serve and enjoy!