Randa  ·  Free Educational Tool

Peptide Reconstitution &
Conversion Calculator

Free, no signup. Enter what your vial says, how much diluent was added, and an amount that has already been provided or reviewed by a licensed healthcare professional — and it shows the matching volume in mL and the measurement in units on a U-100 syringe.

Enter only an amount that has been provided or reviewed by a licensed healthcare professional. This calculator performs mathematical conversions only. It does not determine an appropriate dose, treatment, schedule, cycle, stack, or protocol.

How to use this calculator

Four things to enter. Every one of them comes from a label, a pharmacy, or a licensed professional — none of them come from this page.

  1. Select the syringe

    Choose the total capacity printed on your U-100 syringe: 0.3 mL, 0.5 mL, or 1.0 mL.

    Capacity is not the same as units per mL. A U-100 syringe always represents 100 units per mL, whichever capacity it is. Selecting 0.3 mL does not change the arithmetic — it changes the maximum the syringe holds, which is 30 units, and the scale you see on the meter.

  2. Enter the vial quantity

    Enter the total peptide quantity printed on the official vial or pharmacy label. Pick a preset or enter your own number, in mg or mcg.

    Read it twice and say the unit out loud. mg and mcg differ by a factor of one thousand and look nearly identical in small print.

  3. Enter the diluent volume

    Enter the actual amount of diluent that was added, or the amount directed by the dispensing pharmacy or a licensed healthcare professional.

    Mathematically, more liquid produces a lower concentration and less liquid produces a higher concentration. That is a description of the division, not a suggestion about which to use — this calculator works from the figure you supply and does not indicate a volume of diluent.

  4. Enter the professional-provided amount

    Enter the amount that has already been supplied or reviewed by a licensed healthcare professional, in mcg or mg. The calculator then shows the corresponding volume in mL and the matching measurement in U-100 syringe units.

    This tool does not select that amount, assess whether it is appropriate for anyone, or review it in any way.

Input 1
Total syringe volume The capacity printed on the barrel. All three are treated as U-100 syringes — 100 units per mL — because that is what U-100 means.

Select a syringe capacity.

Input 2
Peptide amount in vial The total quantity printed on the official vial or pharmacy label.

Enter a vial quantity greater than zero.

Input 3
Amount of diluent added The volume that was actually added, or the volume directed by the dispensing pharmacy or a licensed healthcare professional. This calculator does not indicate how much to add.

Enter the actual diluent volume.

Input 4
Amount entered for this calculation Enter the amount provided or reviewed by your licensed healthcare professional. This tool does not select an amount for you.

Enter an amount greater than zero.

Please check the box above to enable the calculator.

Check the box and complete all four inputs to enable Calculate. Once a valid result is showing it updates automatically as you change any input.

Enter only an amount that has been provided or reviewed by a licensed healthcare professional. This calculator performs mathematical conversions only. It does not determine an appropriate dose, treatment, schedule, cycle, stack, or protocol.

Calculation result

Mathematical result

Liquid volume

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Syringe measurement

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Concentration

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Concentration per 0.1 mL

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Selected syringe capacity

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Percentage of syringe filled

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Where that measurement sits

See how this was calculated

    What these figures are. They are arithmetic performed on the four numbers you entered, and they are only as correct as those numbers. This calculator does not know what is in your vial, whether the label is accurate, whether the diluent volume you entered is what was actually added, or whether the amount you entered is appropriate for anyone. It has not determined, reviewed, or endorsed anything. Verify every input and every figure with a licensed healthcare professional or dispensing pharmacist.

    Where to go from here

    The arithmetic is the easy part.

    Knowing what the numbers mean, what to ask, and who to trust is the part that actually takes work. Here is everything else I have made — two of these are free, and so is the group.

    ★ Get the Complete Research Toolkit Organize calculations, compare product information, prepare professional questions, and keep research notes in one place. → ♡ Download the Free Beginner Checklist Six pages on what to understand before anything else — the terminology, the label questions, and what to bring to a licensed professional. → ● Join Randa’s Educational Telegram Group An information and support community for people who are learning. Beginners welcome. No dosing advice given, asked for, or allowed. → ▢ View Randa’s Disclosed Resources Every reference I use and every commercial relationship I have, stated plainly in one place. →