I'm not sure; it was over 3 hours. I wrote this elsewhere:

Engrossing Roman epic that displays a fine balance between the personal emancipation of Spartacus, from lonely slave to popular revolutionary leader, and the political intrigues of Rome itself; the dual narrative with which both are intertwined makes an episodic but dynamic mode of storytelling, by no means unique to this film but so expertly done that it's enjoyable throughout. Ironically, as the titular hero, Kirk Douglas (also executive producer) does less with his onscreen time than the three English heavyweights around him: Laurence Olivier adds nuance as the tortured villain and Charles Laughton steals the film from him, while Peter Ustinov juggles scenes with both effortlessly. Kubrick took over from Anthony Mann after a week's shooting, and it's his least bombastic work; Mann did a fine job with The Decline of the Roman Empire four years later (both films heavily influenced Scott's Gladiator).