PageRank Calculation

Here is an example chart of PageRank Calculator.

Page Rank Calculation
PR Start End Median Median Links Links Links Links
Range Range Value PR Passed for PR5 for PR6 for PR7 for PR8
1 6 30 18 0.30 16,803 92,414 508,277 2,795,522
2 30 164 97 1.65 3,055 16,803 92,414 508,277
3 166 900 533 9.06 555 3,055 16,803 92,414
4 915 4,948 2,931 49.83 101 555 3,055 16,803
5 5,033 27,213 16,123 274 18.362 101 555 3,055
6 27,681 149,670 88,675 1,507 3.339 18.362 100.992 555.456
7 152,244 823,186 487,715 8,291 0.607 3.339 18.362 100.992
8 837,339 4,527,522 2,682,431 45,601 0.110 0.607 3.339 18.362
9 4,605,367 24,901,372 14,753,369 250,807 0.0201 0.110 0.607 3.339
10 25,329,516 136,957,543 81,143,530 1,379,440 0.0036 0.020 0.110 0.607
Assumption: 85% of median value passed
Assumption: 50 links per page average

The assumptions and the mathematics:

For those who are interested I have used logarithmic values of base 5.5. In other words the value range  for a PR1 lies between 5.5 to the power of 1 and 5.5 to the power of 1.99, and  PR2 lies between the value of 5.5 to the power of 2 and 5.5 to the power of 2.99 etc. The rest of the chart is fairly straight forward. It assumes that there are 50 links per page and that 85% of the PR value is passed to the recipient page.

The number of links required to attain any ranking is based on the median value of the donor page and the entry threshold of the desired PR value. In other words to achieve a PR5 you need 5,033 points and the average points available from a PR6 page with 50 links is 1507.
Nobody knows for sure how Google calculates PR. I have shown this chart to a number of knowledgeable people and they have all agreed that my calculations look reasonable. One search engine optimization (SEO) guru from a major firm said the results were very similar to independent research that his firm had conducted.

PS: it’s not 100% proven, but with this you can get an idea of Google PR

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6 Responses to PageRank Calculation

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  4. edgemyFum says:

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