Complete Piano Keyboard DIAGRAM [Piano Keys Layout Labeled] The remaining 36 are black keys also referred to as flats and sharps. Here is an example of a standard 88-key keyboard: Aside from that, there are other variations. The 76-key keyboard has 45 white keys and 31 black keys. Here is an example: Another variation is the 61-key keyboard. This keyboard has 36 white keys and 25 black keys. Check out ...