15 in F major, KV 533/494 (finished 3 January 1788) is a sonata in three movements: A typical performance takes about 23 minutes.

In 1788, Mozart wrote the first two movements of K. 533 and incorporated a revised version of K. 494 as the finale, having lengthened it in order to provide a more substantial counterpart to the other two movements.

[1] Edvard Grieg arranged this sonata for 2 pianos, by adding further accompaniment on the secondo part, whilst the primo part plays the original.

[2] This attempt to "impart to several of Mozart's sonatas a tonal effect appealing to our modern ears" serves to document the taste of Grieg's late nineteenth-century Norwegian audience.

[3] A notable recording is that of Elisabeth Leonskaja accompanied by Sviatoslav Richter.