Floor tiles can crack due to wear and tear, or through damage if a heavy object is dropped on them. Replacing a single tile is more cost-effective than retiling an entire floor. Wear goggles while drilling into the tile, in case any shards fly toward you. Wear gloves to protect your hands.
Drill a series of holes into the broken tile (Image 1). This breaks it up, making it easier to remove.
With a heavy hammer and cold chisel, remove the broken tile. It will come away in sections (Image 2).
Apply adhesive to the back of the new tile and position it. Use a level to make sure it sits flush with the surrounding tiles (Image 1).
Allow the adhesive to dry, then grout the new tile. Clean off any excess with a sponge (Image 2).