According to the original clinical research (Cutting and Tainter's work), every 100mg of crystal DNP per day will increase metabolic rate an average of 11%. Note that this is only an average. Individual sensitivity to it will vary greatly. Also, this assumes crystal DNP content (powder DNP, which is stronger, is about 15% per 100mg). Finally, this already takes into account the long half-life and indicates the increase in metabolic rate after the drug accumulates (so after 3-5 days at a given dose).
So, for example, a daily dose 400mg of powder DNP (after it accumulates) will increase metabolic rate an average of 60%. 400mg/day of crystal DNP will increase metabolic rate an average of 44%.