The term downtime is used to refer to periods when a system is unavailable.

Downtime or Down Time may also refer to:

• Downtime (break), a period of rest and relaxation, especially during a day of labour
• Downtime, a 1986 film directed by Greg Hanec and produced by the Winnipeg Film Group
• Downtime (Doctor Who), a 1995 direct-to-video spin-off of the TV series Doctor Who
• Downtime (film), a 1997 British film
• "Downtime" (The Gandharvas song), 1997
• "Downtime" (Jo Dee Messina song), 2001
• "Down Time", a 2006 single by Aaradhna
• "Downtime", a 2009 song by Timothy B. Schmit from his album Expando
• Down Time, a Turbo Drop ride at Lake Compounce amusement park, Bristol, Connecticut
• Uptime / Downtime, a 2010 double album by the Kleptones
• A Mnemonic for the seven wastes of Muda (Japanese term)
• Down Time, a 2013 zine by American artist Jeremy Bolm
• "Down Time", a 2016 song by Usher from Hard II Love