How long does it take for Google for deindexing pages?

[Ideas-Money-Art]

Hi mozzers,

We just launched a mobile website(parallel) and realized that it created many duplicate content with desktop URLs. I decided to add name="robots" content="No index, No follow" /> to the entire mobile site. My only concern is that I am still seeing the mobile site indexed when it's been almost a week I added these tags.

Does anyone know how long it takes google to deindex your content?

Thanks

[TCM-SEO]

We are in much the same position as Taysir is - we have quite a number of 404s that we would like to have de-indexed from our site.

Were you talking about 404s that were de-indexed in 24-48 hours or is there another way to have pages de-indexed with Google?  We've been waiting 9 weeks as of now and none of them have "fallen" out.

[Ideas-Money-Art]

Thank you Kevin... I just hope in the meantime it won't hurt our current solid rankings!!

[IHSwebsite]

Some of this depends on crawl rate and the number of pages you are aiming to de-index. We ran an exercise in which we aimed to de-index 40k pages from our site. It took two months before we saw at least 50% of the pages de-indexed, while it was 6 months before we even saw 75% of the pages de-indexed. However, these were pages that were part of a subdomain with very little authority and low crawl rates. We performed the same exercise with a smaller set of pages, but much higher crawl rates and higher domain authority, and saw an almost instantaneous (24-48 hour) impact in which they were removed. As the mobile site sounds fairly new, you may just have to be patient on it as it will likely take longer to de-index.