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[[File:Glossary Icon-2.png|100px|frameless|right|link=ICRP Glossary]]

Effective dose is calculated as:

<math>

E = \sum\limits_T w_T \cdot [\frac{H_T^M + H_T^F}{2}]

</math>

where <math>H_T^M</math> and <math>H_F^M</math> are the equivalent doses to the tissues or organs <math>r_T</math> of the Reference Adult Male and the Reference Adult Female, respectively and <math>w_T</math> is the tissue weighting factor for target tissue T, with <math>\sum\limits_T w_T = 1</math>.