Mozart's Piano Sonata No. 16 in C major, K. 545, often nicknamed 'Sonata Facile' (Easy Sonata), is a cornerstone of the piano repertoire, admired for its clarity, balance, and effortless melodic beauty. It serves as an ideal introduction to Classical sonata form.
Focus on achieving a clean, even touch and clear articulation in the rapid scale passages and Alberti bass figures.
Piano Sonata No. 16 in C major (K. 545) is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 5.
You should be comfortable at Henle level 4 — meaning you can already play level 3–4 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
A typical performance of Piano Sonata No. 16 in C major (K. 545) lasts about 10 minutes.
Piano Sonata No. 16 in C major (K. 545) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.