The chords for "When You Were Young" by The Killers are E major, F# major, G# minor, and B major. The song is played in the key of B major and has a tempo of 130 BPM. A common way to play it on guitar includes capo on the 4th fret with chords C, D, Em, and G for an easier version, but the original chords mentioned are standard for the song. This progression repeats throughout the song, creating its distinctive sound.

Here's a basic chord outline for the song:

• Verse and Chorus: E, F#, G#m, B
• Capo Version (easier for beginners, capo 4th fret): C, D, Em, G

These chords match the harmonic structure of the song and are suitable for playing along with the original track. This should help you play "When You Were Young" effectively on guitar. If you want, you can find detailed tutorials and chord charts on sites like Ultimate Guitar or YouTube for visual guidance as well.