Typically, how many keys are on a piano?

The answer is 88 because a modern piano consists of 88 keys. This has become the standard number of keys for pianos due to a combination of historical developments and advancements in music theory. The piano evolved from earlier keyboard instruments such as the harpsichord and clavichord, which had a smaller number of keys. As music became more complex and composers began to explore a wider range of sounds and tonalities, the need for a larger number of keys arose. The range of 88 keys on a piano allows for a wide range of notes, spanning seven octaves from A0 to C8, accommodating the full range of musical compositions and performance requirements.