Are you into biohacking, taking untested drugs and having difficulties with math? Your savior is here: online calculator for drug dose conversion from animals to human.
It takes into account animal species used in drug testing  and estimation of human body surface area from height and weight .
This calculator is intended for illustrative and educational purposes only and is not warranted for any medical use.
Nair, A.B. and S. Jacob, A simple practice guide for dose conversion between animals and human. J Basic Clin Pharm, 2016. 7 (2): p. 27–31.
Kuehnapfel, A., et al., Body surface assessment with 3D laser-based anthropometry: reliability, validation, and improvement of empirical surface formulae. Eur J Appl Physiol, 2017. 117 (2): p. 371–380.