SEPI (search engine positioning index)

SEPI = Total SERP x Keyword Difficulty2 / Position2

The Keyword Difficulty ranks from 0 to 10, and equals the PageRank fo the 10th page under Google. The Ranking and the Total Google Pages are calculated entering the keyword phrase in 

See an online free calculator for  SEPI (search engine positioning index)

See our positioning experiments, periodically updated

This analysis was performed on Nov. 12, 2007, for some of our websites.

search string



Keyword difficulty

Total SERP


domain development tools 2 7 79.4m 972.6m
web promotion service 21 5 179m 44.7m
promocion de sitios 3 4 2.2m 3.9m
promotion campaign 3 3 7m 6.5m
piletas de natacion 14 3 200,000 4080

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