Welcome to the InjectBuddy hub

InjectBuddy is a free, privacy-first suite of injectable hormone and peptide dosage calculators. Every calculation runs entirely in your browser — there is no login, and no inputs are sent to a server or stored anywhere. This blog is where we share product updates, how-tos and notes from our partners and guest contributors.

New here? Most people start with the TRT dosage calculator or one of the GLP-1 tools — the semaglutide dosage calculator and tirzepatide dosage calculator. If you work with peptides, the peptide reconstitution calculator works out exactly how much bacteriostatic water to add and the units to draw.

Prefer to read first? Our guides library covers dosing, reconstitution and protocol basics in plain English, each backed by citations — for example the TRT guide and the semaglutide dosing guide.

Want to write for us or partner up? See the partners & resources hub for how to get in touch.