How To Pronounce Slept

In British English, slept is pronounced /slept/. The narrow phonetic transcription is [slept̚]. In American English, it is pronounced /slept/.

Slept has one syllable. British and American speakers say it the same way.

Slashes / / show the phonemic transcription, the sounds that change meaning. Square brackets [ ] show the phonetic transcription, with the finer detail of how the sounds are actually made.