"We've been closing about 30 stores a year for the past three or four years so it's only a bit of an acceleration of that.
"It's going to be the stores that are performing the worst, but we're also going to look at it by location as well."
Analysts had predicted the decision to shut down many of the 386 stores because of poor sales. There are 71 Dick Smith stores in New Zealand, 19 of them in Auckland.
Chief executive Grant O'Brien said divesting the Dick Smith chain would allow Woolworths to invest more in serving its core business customers. There had already been a number of unsolicited approaches from potential buyers, he said.
The proposal has incensed the chain's founder Dick Smith, who fears Woolworths may sell the stores to overseas interests.