Guitar and piano are two instruments that are unique in that each playable note on the instrument is visible on the body. This makes finding notes on the instrument easier while reading music due to the lack of intricate key fingerings. Guitars and pianos are often used together in songs. However, in order for a guitarist to read piano music, the notes must be changed. This is because a guitar is in the key of E, and the piano is in C. Transposing refers to the changing of notes with keys.
Write out the piano music to be transposed on a sheet of staff paper.
Move each note four half steps up. This will change the music from C, the piano's key, to the key of the guitar, which is E.
Play the music for the respective instruments together to verify that the pitches are correct in the guitar music.