Tool

Peptide Calculator: Free Reconstitution & Dosing Tool

Free UK peptide reconstitution calculator for research-grade peptide dosing. Converts vial mg + bacteriostatic water volume + target dose into mg/mL concentration, mL draw volume, and U-100 insulin syringe units. Includes step-by-step guide, worked examples, and supported peptides (semaglutide,…

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Last updated: April 2026 · UK research-grade reference · For laboratory research use only — not for human consumption

This free peptide calculator converts any lyophilised research peptide vial into exact draw volumes and U-100 insulin syringe units. Enter your vial size (mg), bacteriostatic water volume (mL) and target dose — the peptide reconstitution calculator does the rest instantly. No login, no spreadsheet, no manual maths. Covers all major UK research peptides: semaglutide, tirzepatide, retatrutide, BPC-157, TB-500, CJC-1295, ipamorelin, GHK-Cu, PT-141 and more. Bookmark this page as your permanent peptide dosing calculator reference.

Quick answer: Peptide reconstitution converts lyophilised powder to a defined aqueous concentration by adding a measured volume of bacteriostatic water (0.9% benzyl alcohol preserved). Core formula: concentration (mg/mL) = vial size (mg) ÷ water added (mL). Draw volume (mL) = target dose (mg) ÷ concentration (mg/mL). Insulin syringe units on the standard U-100 scale = draw volume (mL) × 100. Use the interactive peptide calculator below, then cross-check your maths against the worked examples. For UK research-grade lyophilised peptide, store reconstituted solution at 2-8°C and use within the peptide-specific stability window (typically 30-56 days).

Interactive Peptide Calculator

Vial size (mg)

Informational content for research. This material is educational and intended for laboratory research contexts. It is not medical advice, a prescription, a clinical protocol, or a guarantee of outcome.