How Google PageRank is Calculated

Okay now we are to the Google PageRank Calculations, this is very simple so pay attention, I learned it over night, not really. The factors about Google PageRank Calculation is that no one knows exactly how it works, but people have discovered over time somewhat how it works, but lets get into an example.

PR(A) = (1-d) + d(PR(t1)/C(t1) + ... + PR(tn)/C(tn))

Above is a Google PageRank algo. that was released in the development of Google algo. Thats right the actualy algo equitation . Which google is not telling us what it does, but that does not matter because the equatation is good enough.

In the equation 't1 - tn' are pages linking to page A, 'C' is the number of outbound links that a page has and 'd' is a damping factor, usually set to 0.85.

A more simpler way to think of it is:

a page's PageRank = 0.15 + 0.85 * (a "share" of the PageRank of every page that links to it)

Share = The linking page's PageRank is divided by the number of outbound links

A page "votes" an amount of PageRank onto each page that it links to. The amount of PageRank that it has to vote with is a little less than its own PageRank value (its own value * 0.85). This value will be shared equally between all pages

Therefore; it would be better to get a page linked to you that has a PageRank of 5 with 2 outbound links then it would be to have a page linked to you with a PageRank of 8 with 500 outbound links, but don't get me wrong. It would be better to have both pages linked to you, but if you was to take your choice, think about it.

Now the Google PageRank algorithm is based between a pr of 1 to 10, but many people believe that numbers are set to a algo logarithmic scale. Which there is a very good reason to believe this, but no one knows for sure outside of google, now there has probably been people that have figured it out somewhat, but to be sure, you would of had to write the Google PageRank algorithm your self.

PageRank 0

Often indicates that the page rank has not yet been assigned, or that the site has no inbound links.

PageRank 1 to 2

Very few inbound links, and those links are from low ranking sites.

PageRank 3

Site has some inbound links, either a large number of low quality links or a few links of good quality. Site will be returned on search results, but will tend to be outranked by other competitive sites.

PageRank 4

Site has many good inbound links. An achievable target for most small clubs and companies.

PageRank 5

Site has many good inbound links. Achievable with work. This is the highest PageRank that most sites can realistically aspire to.

PageRank 6

Very difficult to obtain because of the number and quality of inbound links required.

PageRank 7-10

Extremely difficult to obtain for all but the most popular websites. Often only obtained by websites that have become household names.

The original PageRank formula used and patented by Google was:

PR(A) = (1-d) + d(PR(T1)/C(T1) + ... + PR(Tn)/C(Tn))

where:

PR(A)

is the page rank of the page to be calculated.

T1 ... Tn

The pages which point to page A.

d

A damping factor, which can be set between 0 and 1 (typically 0.85) and which Google may set individually for sites.

C(A)

The number of links out from page A.

Google may have revised this formula since it was first introduced. What the formula shows is that the page rank of a page will be higher the more pages link to it and that links from pages with a higher page rank count for more than links from pages with a lower page rank.

When does Google calculate PRs?

Google calculates pages PRs once every few months, this is called PR update. After a PR update is done, all pages are assigned a new PR by Google and you will have this PR until a new PR update is done.

New sites that were just launched will have a PR of 0 until an update is done by Google so that they are assigned an appropriate PR.

Other 'possible' factors considered

The following are some other factors might be considered by Google for calculating the PR lately:

* Site age: The older the better, Google seems to like old sites.

* Backlink relevancy: Googles seems to be taking into account how relevant is the page linking to you, if it is not that relevant, the link won't weight much.

* Backlink duration: How long was the backlink up? The more the better.

How to increase my PageRank?

Well as you would have probably guessed, PR can be increased by getting more backlinks for your page. The more backlinks and the higher quality they are the more your PR will be.

Here are some tips:

* Submit your site to directories.

* Write important content to your site that would make people link to you.

* Write articles and distribute them.

* Although I don't recommend it but some people recommend it: Do link exchanges.

* Participate in forums (while adding your signature which includes a link to your site).

* Buy some links on high PR pages.

What Is Google's PageRank?

PageRank is part of Google's method of ranking web pages. Google explains it best at their web site:

"PageRank relies on the uniquely democratic nature of the web by using its vast link structure as an indicator of an individual page's value. In essence, Google interprets a link from page A to page B as a vote, by page A, for page B. But, Google looks at more than the sheer volume of votes, or links a page receives; it also analyzes the page that casts the vote. Votes cast by pages that are themselves "important" weigh more heavily and help to make other pages "important.""

It is important to remember that PageRank is but one factor Google uses to determine the rank of a web page in the search results. This is why you can find pages with a lower PageRank listed above pages with a higher PageRank. Google also factors in the content of the page and the pages linking to it.

Don't become overly concerned about your PageRank. Focus instead on properly building a high quality site with loads of great content that serves your visitors well. If you do this, improved PageRank will follow naturally

How is PageRank Calculated?

No one knows for sure how PageRank is currently calculated by Google (except Google itself Smile). Some speculations about the algorithm are made by webmasters all of them are based on the original PageRank published by Google.

In essence, Google interprets a link for page A to page B as a vote by page A for page B. This means that page A is considered important (at least by page B).

The more votes (more links) page A gets the higher its PR will be.

Going into more details

As stated above, the main factor in PR is links (or backlinks as they are called). But no all links weight the same when it comes to PR. So an 'important' page linking to you gives you more PR than a 'less important' one.

There for you should always try to get backlinks from pages that have a high PR. These will benefit your page the most.

Another factor in PR propagation is the number of out-links the 'voting' page have. So a PR4 page with only one out-link on it might give you more weight than a PR5 page with 100 out-links on it.

An typical example here would be the famous milliondollarhomepage. This page is PR7 page with hunderds of out-links therefore its weight is would contribute very little to your page PR.