About Null Health
Educational dose calculators - built in the open.
Null Health is a small set of mobile-first dose calculators for people learning their way around GLP-1 agonists, testosterone replacement therapy, and peptide reconstitution. The site exists for one reason: when you are trying to translate weekly mg into mL per injection or U-100 syringe units, you should not have to do it on a scrap of paper.
Every calculator on this site is arithmetic only. They convert units. They show you the formula. They never decide your protocol, never claim knowledge of your medication, and never replace a licensed clinician. Each input is private to your browser - we do not log, store, or transmit your dose values.
Principles
- Transparent math. Every formula is listed on the calculator page. If you do not understand what the calculator did, that is a bug we want to know about.
- Clearly labelled placeholders. Until a formula has been clinician-reviewed it is marked as placeholder. We would rather over-disclose than under-disclose.
- Mobile first. Most users are checking a number on a phone, often before drawing a syringe. Every page is designed for that flow first.
- Not medical advice. Always confirm with a licensed prescriber and the actual product labelling for your medication.
Learn more
- Methodology - how the formulas are sourced and vetted.
- Disclaimer - the full not-medical-advice statement.