Things You'll Need
Instructions
Write down the notes in your original key on a piece of paper. Write them from left to right, from the home note to the octave above it.
Find out the distance in semitones between your key and the key to which you want to transpose. Semitones are one movement down the staff music. For example, a D and a C# are one semitone away from each other.
Use your sheet music to count the distance from your original key upward or downward to come up with the new notes in your key. For example, moving from F major to C major requires you to transpose down five semitones to change the notes from F, G, A, Bb, C, D, E and F to C, D, E, F, G, A, B and C.
Repeat this process with all the music in your key or music chart to change the melodies and harmonies to the new key. Play the music on an instrument to make sure the notes and harmonies sound right.