About Peptide Calculators

What We Do

PeptideCalculators.org builds and maintains dosing and reconstitution calculators for the peptides most commonly searched by clinicians, pharmacists, researchers, and informed patients — GLP-1 receptor agonists like semaglutide and tirzepatide, investigational triple-agonists like retatrutide, and research peptides including BPC-157 and TB-500.

We exist because the most frequent error in peptide administration is not the injection itself — it is the arithmetic between a vial’s mg strength, the bacteriostatic water added, and the number of units drawn on an insulin syringe. A calculator that gets that math wrong, or hides its assumptions, creates real risk. Our goal is to be the calculator that can be trusted to be right and whose sourcing can be checked.

What We Publish

• Dose calculators for each peptide, covering common vial sizes and reconstitution volumes.
• Converters for mg, mcg, units, and reconstitution-volume math.
• Reference guides summarizing titration schedules, half-life, storage, and comparisons.
• Clear regulatory status labeling on every peptide page: approved drug, investigational, or research-only.

Editorial Principles

• Primary sources first. We cite FDA prescribing information, peer-reviewed clinical trials, and manufacturer documentation ahead of secondary summaries. Our methodology page documents this in full.
• Status labeling is non-negotiable. Approved drugs are labeled as such. Investigational molecules are marked with their trial phase. Research peptides are labeled as not approved for human use. We do not soften this for traffic.
• Calculators are reviewed, not just published. Calculators are checked against current prescribing information or the most recent trial data on a regular review cadence and whenever new primary sources are released.
• We publish corrections with dates. When we are wrong, we update the page, add a visible correction note, and keep the correction visible for at least 90 days.
• No paid placement. No sponsored calculator positioning and no paid inclusion in comparison pages.

Who Operates This Site

PeptideCalculators.org is operated as part of a broader network of independent health and performance tools under PhysiqueOS. The site is intentionally self-serve: it is designed for users who want accurate math and transparent sourcing without a paywall or a login.

We are not a medical practice, a pharmacy, or a supplier. We do not write prescriptions, sell peptides, or endorse vendors.

What We Don’t Do

• We do not provide individualized medical advice or dosing recommendations.
• We do not sell, source, or broker peptides.
• We do not endorse specific vendors or compounders.
• We do not publish content that implies research peptides are safe or effective for human use.

Corrections and Feedback

If you find an error in a calculator, a citation, or a dosing reference, send it to us through the contact page. We investigate every correction report and publish verified fixes with a visible date stamp.