Quantification/Calculations is the process of assigning numerical values to feats of strength, speed etc using scientific methods. Most calculations are generally well supported estimations based on physical properties that are assumed i.e we assume that the universe in question has the same universal constants of ours. Well done calculations generally have more weight than unquantifiable feats in the OBD. They are sometimes overridden by authors comments. The two OBDers that were (emphasizing this word since they're, you know, inactive for years) fond of consistently cranking out calculations from every orifice of their bodies are Pipboy and Limit_tester. Calculations are always met with opposition and are continually contested.

Here are some links for reference.

Pipboy's One piece speed thread
Limit_Tester's One piece speed thread
Limit_Tester's One piece speed thread Two
Limit_Testers HxH speed thread
Limit_Testers Naruto speed thread
HugeGuy's Bleach speed thread
Segan's all purpose calculation thread
Shin's bleach speed thread
Limit_tester's notorious luffy gold ball feat
Endless Mike's Jolyne Kujo (JJBA) calculation thread
Red's Gantz reaction time calculation
Zetta's Op calculation directory
Aku shinigami's Bleach speed calculations
KoKain's Sagemode Naruto rhino feat
Aku Shinigami's Las Noches size calc
Aku Shinigami's Las Noches and Thriller Barks size comparison calc
Red's Claymore Speed Thread

See Also:

- Calculation Methods