Px
PeptideCalc

Reconstitution Math — The Complete Guide

All peptide dosing math comes down to two formulas. Here they are with worked examples.

🧮

Formula 1: Concentration

Concentration (mcg/mL) = (Vial mg × 1000) ÷ BAC water mL Why × 1000? Because 1mg = 1,000mcg. We convert to mcg for dose precision. Examples: • 10mg BPC-157 + 3mL BAC = (10 × 1000) ÷ 3 = 3,333 mcg/mL • 5mg Semaglutide + 2mL BAC = (5 × 1000) ÷ 2 = 2,500 mcg/mL • 50mg GHK-Cu + 3mL BAC = (50 × 1000) ÷ 3 = 16,667 mcg/mL • 1mg IGF-1 LR3 + 3mL BAC = (1 × 1000) ÷ 3 = 333 mcg/mL
🧮

Formula 2: Dose Volume

Volume to inject (mL) = Desired dose (mcg) ÷ Concentration (mcg/mL) Examples: • 500mcg BPC-157 from 3,333mcg/mL: 500 ÷ 3,333 = 0.150 mL • 250mcg Semaglutide from 2,500mcg/mL: 250 ÷ 2,500 = 0.100 mL • 1,000mcg Tesamorelin from 5,000mcg/mL: 1,000 ÷ 5,000 = 0.200 mL • 10mcg IGF-1 from 333mcg/mL: 10 ÷ 333 = 0.030 mL
🧮

Formula 3: Insulin Syringe Units

A 1mL/100-unit insulin syringe: 1 unit = 0.01mL Units to draw = Volume (mL) × 100 Examples: • 0.150mL = 15 units • 0.100mL = 10 units • 0.200mL = 20 units • 0.030mL = 3 units Quick mental check: "units" on an insulin syringe = mL × 100
🧮

Doses Per Vial

Doses per vial = (Vial mg × 1000) ÷ Dose mcg Examples: • 10mg BPC-157, 500mcg dose: (10 × 1000) ÷ 500 = 20 doses • 5mg Semaglutide, 250mcg/week: (5 × 1000) ÷ 250 = 20 doses = 20 weeks • 10mg Ipamorelin, 200mcg, 3x/day: (10 × 1000) ÷ 200 = 50 doses = 16 days

Questions

Ready to calculate?

Use our peptide calculator — all math done for you.

Open Calculator →