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Seven white keys and five black keys form an octave. As you already know, now pianos have 88 keys, that is, 7Â¼ octaves. As a rule, there are 52 white keys and 36 black keys on a regular piano. However, not only standard 88 key pianos are used now. Some well-known piano makers produce instruments with different number of keys. For example, there are 92 of them in BÃ¶sendorfer 225, and even 97 keys in BÃ¶sendorfer 290.
Most pianos have 88 keys. You can get small pianos with 76 keys and large pianos with as many as 97 keys, but most pianos have 88. 36 white. 25 black. In total 61 if i did mâ¦y math right. keys are also the levers that you press to provide the sound of the correct notes Also, some small toy electric keyboards have as little as 21 keys.