Is this calculator an FDA-approved medical device?

No. It is an educational reference that implements arithmetic published in reconstitution protocols and documented in USP pharmaceutical-compounding chapters. It is not software that has been submitted to or cleared by the FDA. It is not a substitute for a licensed pharmacist's compounding workflow. The arithmetic is the same in both cases; the accountability, oversight, and accuracy verification are not.

Why does the calculator show insulin-syringe units as well as mL?

Because insulin-syringe unit markings (U-100: 100 units equals 1 mL) are the most common gradation on the syringes used in published subcutaneous peptide protocols, and confusing mL with units is a documented failure mode that produces 10-fold dose errors. Showing both values cross-verified against each other reduces that class of error. It does not eliminate it.

What inputs does the calculator not accept?

It does not take compound names and does not look up doses. It takes mass, volume, and target dose, all numeric inputs the user has to source themselves. This is deliberate. A calculator that auto-populated doses by compound name would be a dose-recommendation tool, and a dose-recommendation tool is not within the PepVise editorial scope. The user brings the protocol; the calculator does the arithmetic.

Can I use the calculator for any peptide?

The arithmetic is compound-agnostic, concentration is mass over volume regardless of what the mass is. What varies by compound is the appropriate starting concentration, the solvent (bacteriostatic water, sterile water, saline), the stability window, and the target dose from the protocol. Those choices belong to the reader and the underlying published protocol, not to the calculator.

Does the calculator store my inputs?

No. The calculator is client-side: inputs are processed in the browser and are not transmitted to PepVise servers or any third party. There is no user account, no save state, and no analytics tied to calculator inputs. That is a deliberate privacy choice for a tool that deals with an area the regulatory framework treats seriously.

Compound profile· Reconstitution

Peptide Reconstitution Calculator

By The PepVise Editorial Team · Reviewed April 21, 2026 · 6 min read

Research-context calculator, peptide mg plus bacteriostatic-water volume to mg/mL concentration, unit output, and visual syringe.

We describe what has been measured — by whom, at what scale, with what effect size, and with what caveats. Hedging, here, is honesty.

— The PepVise Editorial Teamfrom the house style guide

Editorial reference

Digital tool

The PepVise Reconstitution Calculator (this page)

The tool this page exists to host. The math is inherited from our shared calculator library and is unit-tested: peptide mass in milligrams divided by bacteriostatic-water volume in milliliters equals concentration in mg/mL, and target-dose volume is target-dose divided by concentration. That is the entire calculation. Everything else on this page is context, disclaimer, and the citation chain for why each step is specified the way it is.

Reference reading

The texts we read alongside the papers.

01
Digital tool (this page)
PepVise Reconstitution Calculator
Client-side React calculator. Inputs: peptide mass (mg), diluent volume (mL), target dose from published protocol. Outputs: concentration (mg/mL), volume per dose (mL), equivalent insulin-syringe unit marking. Unit-tested math; no server-side data retention.
02
Digital tool
InjectCompass Patient-Education Calculator (sister site)
Same underlying math, different framing. InjectCompass renders the calculator for a patient-education context (compounded-peptide prescription holders). PepVise renders the same math under the research-protocol frame. We keep both because the audiences are different; we do not recommend one over the other for any given reader, pick the frame that matches the reader's actual situation.
03
Standards reference
USP <1160>, Pharmaceutical Calculations in Prescription Compounding
The USP chapter on the math that licensed pharmacies use for compounding calculations. Our calculator implements the same arithmetic, with the important difference that a calculator on the internet is not a licensed pharmacist. Readers verifying the math against the standard should find them aligned.

Methodology

How we read the literature

Evidence tier: We grade the literature on four tiers, High (replicated RCTs or meta-analyses), Moderate (multiple trials with mixed findings), Low (a single pilot or case series), and Anecdotal (preclinical only, no human data). The tier appears on every compound profile beside the claim it supports.
Trial stage: Where a compound sits in the human development pipeline is recorded as Preclinical, Phase 1, Phase 2, or Phase 3+. We pull the current stage from ClinicalTrials.gov and the EU Clinical Trials Register on access date and re-verify quarterly.
Regulatory status: We state the FDA posture plainly, approved for indication X, or labeled for research use only, or removed from the 503A list, or investigational under a specific IND. Regulatory status changes; every post carries a review date.
Where we're uncertain: Every compound profile closes with a named uncertainty section, the question we can't answer from the current literature, the trial we'd want to see, the effect size we'd treat as a real signal. Uncertainty is not a failure mode here; it's load-bearing.

Frequently asked

The questions readers actually bring us.

Is this calculator an FDA-approved medical device?: No. It is an educational reference that implements arithmetic published in reconstitution protocols and documented in USP pharmaceutical-compounding chapters. It is not software that has been submitted to or cleared by the FDA. It is not a substitute for a licensed pharmacist's compounding workflow. The arithmetic is the same in both cases; the accountability, oversight, and accuracy verification are not.
Why does the calculator show insulin-syringe units as well as mL?: Because insulin-syringe unit markings (U-100: 100 units equals 1 mL) are the most common gradation on the syringes used in published subcutaneous peptide protocols, and confusing mL with units is a documented failure mode that produces 10-fold dose errors. Showing both values cross-verified against each other reduces that class of error. It does not eliminate it.
What inputs does the calculator not accept?: It does not take compound names and does not look up doses. It takes mass, volume, and target dose, all numeric inputs the user has to source themselves. This is deliberate. A calculator that auto-populated doses by compound name would be a dose-recommendation tool, and a dose-recommendation tool is not within the PepVise editorial scope. The user brings the protocol; the calculator does the arithmetic.
Can I use the calculator for any peptide?: The arithmetic is compound-agnostic, concentration is mass over volume regardless of what the mass is. What varies by compound is the appropriate starting concentration, the solvent (bacteriostatic water, sterile water, saline), the stability window, and the target dose from the protocol. Those choices belong to the reader and the underlying published protocol, not to the calculator.
Does the calculator store my inputs?: No. The calculator is client-side: inputs are processed in the browser and are not transmitted to PepVise servers or any third party. There is no user account, no save state, and no analytics tied to calculator inputs. That is a deliberate privacy choice for a tool that deals with an area the regulatory framework treats seriously.

What would change our reading

A Phase 2 randomized trial with blinded outcome assessment would change the reading. A new independent replication outside the currently dominant research group would change the reading. A regulatory action — approval, restriction, or a class warning — would change the reading. When any of those lands, we update this profile within a week and mark what changed.

The sources

References cited on this page.

PubMed, ClinicalTrials.gov, and FDA documents only. Secondary sources appear when needed to characterize public discourse, never as a source for a clinical claim.

The masthead

About The Pepvise Editorial Team

The Pepvise Editorial Team is a small group of researchers and science writers reading the peer-reviewed peptide literature and translating it into calm, cited analysis. We do not sell peptides, recommend peptides, or tell readers what to administer. We describe what has been measured, by whom, at what scale, with what effect size.

Compound reviews are signed off by Dr. Priya Narang, MD, MPH (endocrinologist) and Dr. Marcus Haley, PharmD, BCPS (board-certified clinical pharmacist). Both hold verifiable state-board licenses and have signed editorial-independence letters with us. See the full editorial board →

Adjacent in the literature.

Reconstitution · Compound profile

How to Reconstitute Peptides, the Literature-Based Guide

Step-numbered reconstitution procedure with research-context framing. Pairs with InjectCompass's patient-education version.

10 min read

Get the 2026 Peptide Evidence Ledger.

A 12-page PDF summary of where 10 major compounds sit, Preclinical / Human pilot / Phase trial / FDA status. Updated quarterly. Free.

By subscribing, you agree to our Privacy Policy. One calm, cited email a week. Unsubscribe anytime.