# Peptide Reconstitution Calculator mg to mcg + Chart & Table  **[Peptide reconstitution calculator mg](https://peptidecalculator.store/peptide-reconstitution-calculator/)** is where most people get confused, not because the math is hard, but because the units switch between mg, mcg, ml, and IU, and a small mistake changes the dose completely. Here is a complete, practical guide to understanding the calculator, the chart, and the table — so you can verify what you are doing and talk to your clinician intelligently about it. Important: This is for general information and education only. Peptides are prescription medications in many countries. Reconstitution must be done with sterile technique and only under the guidance of a licensed healthcare provider or pharmacist. If you are using peptides, always confirm your dilution and dose with your prescriber. The label says something like "5mg" or "10mg" — that's the total amount of active peptide in the vial, not per ml. You add a diluent, usually Bacteriostatic Water (0.9% benzyl alcohol) or Sterile Water for Injection, to dissolve it. After you add the water, you have a liquid with a known concentration. The two formulas that run everything: Formula A - Concentration: ``` Concentration (mg/ml) = Total Peptide in Vial (mg) / Total Diluent Added (ml) Concentration (mcg/ml) = Concentration (mg/ml) x 1000 ``` Formula B - Volume to draw for a desired dose: ``` Volume to Inject (ml) = Desired Dose (mg) / Concentration (mg/ml) Or, if you work in units on an insulin syringe: Volume to Inject (units) = Volume to Inject (ml) x 100 Because 1ml = 100 units on a U-100 insulin syringe ``` Example: You have a 10mg vial and you add 2ml of bacteriostatic water. Concentration = 10mg / 2ml = 5mg/ml = 5000mcg/ml If your desired dose is 250mcg (0.25mg): Volume = 0.25mg / 5mg/ml = 0.05ml = 5 units on an insulin syringe. ### 2. How to Use a Peptide Reconstitution Calculator A calculator does those two formulas for you. You enter three values: 1. Amount in vial (mg): Check the label. Desired dose (mcg or mg): What your provider prescribed. The calculator outputs: - Final concentration in mg/ml and mcg/ml - How much liquid equals your dose in ml and insulin syringe units - How many doses are in the vial Pro tip from compounding pharmacists: Don't over-dilute or under-dilute. - Adding too little water (e.g., 0.5ml to 10mg) makes concentration very high. A tiny error in drawing = big dose error. - Adding too much water (e.g., 5ml to 2mg) makes it hard to measure small doses accurately. For most peptides, 1-2ml for a 5mg vial and 2-3ml for a 10mg vial gives a concentration that is easy to measure with a U-100 insulin syringe. ### 3. mg to mcg Conversion - The #1 Source of Error Always convert before you calculate. - 1 mg = 1000 mcg - 0.1 mg = 100 mcg - 1g = 1000 mg If your vial says 5mg and your prescription says 500mcg, you are dealing with the same unit system after conversion: 5mg = 5000mcg. So 500mcg is 1/10th of the vial. ### 4. Peptide Reconstitution Chart - Concentration by Dilution This chart assumes you add the listed amount of bacteriostatic water to the vial **[Peptide Reconstitution Chart](https://peptidecalculator.store/peptide-reconstitution-calculator/)**. Find your vial size in the left column. Chart A: Final Concentration (mg/ml) | Vial Size | + 1ml water | + 2ml water | + 3ml water | + 4ml water | | --- | --- | --- | --- | --- | | 2mg | 2.0 mg/ml | 1.0 mg/ml | 0.66 mg/ml | 0.5 mg/ml | | 5mg | 5.0 mg/ml | 2.5 mg/ml | 1.66 mg/ml | 1.25 mg/ml | | 10mg | 10.0 mg/ml | 5.0 mg/ml | 3.33 mg/ml | 2.5 mg/ml | | 15mg | 15.0 mg/ml | 7.5 mg/ml | 5.0 mg/ml | 3.75 mg/ml | Chart B: Same Concentration in mcg/ml - useful for low-dose peptides | Vial Size | + 1ml water | + 2ml water | + 3ml water | | --- | --- | --- | --- | | 2mg | 2000 mcg/ml | 1000 mcg/ml | 666 mcg/ml | | 5mg | 5000 mcg/ml | 2500 mcg/ml | 1666 mcg/ml | | 10mg | 10000 mcg/ml | 5000 mcg/ml | 3333 mcg/ml | If you need to draw 250mcg from a 5mg vial reconstituted with 2ml, your concentration is 2500mcg/ml, so you need 0.1ml = 10 units. ### 5. Peptide Reconstitution Table - Dose to Units This is the table people tape to their fridge. It answers: "If I have THIS vial and added THIS much water, how many units do I draw for my dose?" All values are in insulin syringe units (U-100). 100 units = 1ml. Scenario 1: 5mg Vial + 2ml Water = 2500mcg/ml | Desired Dose | Volume in ml | Units to Draw | | --- | --- | --- | | 100 mcg | 0.04 ml | 4 units | | 250 mcg | 0.10 ml | 10 units | | 500 mcg | 0.20 ml | 20 units | | 1000 mcg (1mg) | 0.40 ml | 40 units | Scenario 2: 10mg Vial + 2ml Water = 5000mcg/ml (Very Common) | Desired Dose | Volume in ml | Units to Draw | | --- | --- | --- | | 100 mcg | 0.02 ml | 2 units | | 250 mcg | 0.05 ml | 5 units | | 500 mcg | 0.10 ml | 10 units | | 1000 mcg (1mg) | 0.20 ml | 20 units | | 2000 mcg (2mg) | 0.40 ml | 40 units | Scenario 3: 10mg Vial + 3ml Water = 3333mcg/ml (Easier for micro-dosing) | Desired Dose | Volume in ml | Units to Draw | | --- | --- | --- | | 100 mcg | 0.03 ml | 3 units | | 250 mcg | 0.075 ml | 7.5 units | | 500 mcg | 0.15 ml | 15 units | Notice how adding more water makes small doses easier to measure accurately. This is not a dosing instruction, just the standard sterile technique taught in pharmacy: Common Mistakes That Change Your Dose - Using a 3ml or 5ml syringe instead of an insulin syringe: The markings are different. For peptide volumes under 1ml, always use a 0.5ml or 1ml U-100 insulin syringe. - Not accounting for displacement: Lyophilized powder adds a tiny volume (0.1-0.2ml). For 1-2ml dilutions this is negligible for most purposes, but compounding pharmacies factor it in. - Confusing IU and mg: Some peptides like HCG are measured in IU, not mg. The IU to mg conversion is different for every peptide — do not use a mg chart for an IU product. - Assuming all vials are the same: Two vials both labeled "10mg" from different sources may have different fill or purity. Only use pharmacy-dispensed, prescribed products. ### 8. Quick Reference Formula Card Save this: ``` To get concentration: mcg per ml = (mg in vial x 1000) / ml water added To get units for dose: Units = [ Desired Dose (mcg) / mcg per ml ] x 100 Total doses in vial: Doses = Total mcg in vial / Desired dose per injection ``` For example: 10mg vial (10,000mcg) / 250mcg dose = 40 doses total, regardless of water added. Water only changes how much liquid each dose is. If you are working with a provider, bring your vial size **[peptide reconstitution table](https://peptidecalculator.store/peptide-reconstitution-calculator/)**, the amount of water you plan to add, and the calculator result to your appointment and ask them to double-check the math before you administer anything. Would you like me to build you an interactive calculator where you enter your vial mg, water ml, and desired dose in mcg, and it outputs ml and insulin units automatically?