Peptide Calculators

Precise dosing is the foundation of safe and effective peptide use. Small errors in reconstitution, unit conversion, or syringe measurement can reduce efficacy or increase side effects. Reliable calculators eliminate guesswork and help biohackers, clinicians, and enthusiasts achieve consistent results.

Why accuracy mattersPeptides are dosed in micrograms (mcg), while vials are labeled in milligrams (mg). Reconstitution involves adding bacteriostatic water (BAC water) to reach a specific concentration. Final syringe units depend on vial strength, water volume, and desired dose. Missteps here waste expensive product or deliver inconsistent effects. A good calculator handles these variables instantly and shows step-by-step math.

Core features to look for

• Reconstitution calculator (mg vial + ml water → mcg/ml concentration)
• Dose converter (mcg to insulin syringe units)
• IU conversion for research peptides
• Ability to save custom protocols
• Clear display of total volume needed per injection
• Error checking for impossible inputs

Recommended tools (January 2026)

1. Peptide Calculator (web)Free, fast, no login required. Handles most common peptides (BPC-157, TB-500, Semaglutide, etc.). Input vial mg, BAC water ml, target mcg dose → instant syringe units output.
2. Peptide Dose Calculator (iOS)Clean mobile interface designed for daily use. Saves multiple protocols, shows dilution graphs, and includes notes field for cycle tracking. Works offline after first download.
3. Biohacker Calculator (Android)Comprehensive app with peptide section plus extras (nootropic stacks, fasting timers). Strong on math for multi-peptide blends and variable dosing. Regular updates keep it current with new compounds.

Basic formula referenceDesired dose (mg) = target mcg ÷ 1000Concentration (mcg/ml) = vial mg × 1000 ÷ ml BAC water addedSyringe units (1 ml insulin syringe) = (desired dose mg × total volume ml × 100) ÷ vial mg

Example: 5 mg vial + 2 ml BAC water = 2500 mcg/mlTarget 250 mcg dose = 0.1 ml = 10 units on standard U-100 syringe

Quick tips for best results

• Use insulin syringes (U-100 = 100 units per ml)
• Round doses conservatively; never exceed calculated units
• Photograph your vial label for reference
• Start at the lowest effective dose and titrate slowly
• Store reconstituted peptides in refrigerator (2–8°C)
• Discard after 28 days or if cloudy

Using a dedicated calculator takes seconds and prevents costly mistakes. Whether you're running a longevity stack, recovery protocol, or performance cycle, consistent dosing delivers better outcomes. Bookmark these tools and verify every new vial. Precision is power in peptide therapy.