Everything, from the 100m time to the height in pole vault, has to be converted into points, that make up the final score in a decathlon. To do that, there are exact formulas and scoring tables.
This handy combined events points calculator allows you to calculate both of men's and women's decathlon, heptathlon and pentathlon scores. Also adjust for junior competitions.
I want to thank the publisher of this site very much, because I wrote my final work for school about "A critical view of decathlon" and Decathlon 2000 is the most important homepage about this topic. I am a decathlete myself and wish everybody much fun with this topic - Uli Röhrl