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PeptideWiki.bio

Reconstitution calculator

Convert your confirmed dose into a measurable syringe or pen setting.

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Mixing liquid and volume must follow the product instructions. BAC water does not establish a peptide’s shelf life. Read the mixing-liquid instructions ↗

How the numbers work

  1. 1

    Concentration is the vial content divided by the final liquid volume

    5 mg in a final liquid volume of 2 mL gives 2.5 mg per mL. Use the volume specified by the product instructions; powder displacement can affect final volume.

  2. 2

    Volume per draw is the amount you want divided by that concentration

    A 250 mcg draw is 0.25 mg, and 0.25 divided by 2.5 is 0.1 mL.

  3. 3

    Units are millilitres times 100

    A U-100 syringe reads 100 units per millilitre, so one unit is 0.01 mL and 0.1 mL is 10 units. The zero graduation sits at the needle end.

  4. 4

    Draws per vial is whole draws only

    5 mg of content divided by a 0.25 mg draw is 20 draws. Divide and round down — a part-draw left at the bottom is not a draw.

Common questions

How much bacteriostatic water goes into a 5 mg vial?
Use the compatible mixing liquid and volume specified by that product. Never use household water. BAC water is appropriate only when the product instructions call for it; a calculator cannot establish compatibility.
How do I convert milligrams to syringe units?
Divide the amount per draw by the concentration to get millilitres, then multiply by 100. A U-100 syringe reads 100 units per millilitre, so one unit is 0.01 mL.
What is the concentration after reconstitution?
The vial content divided by its final liquid volume. A 10 mg vial in a final volume of 2 mL is 5 mg per mL.
How many draws does one vial give?
The vial content divided by the amount per draw, rounded down to a whole number. A 5 mg vial drawn at 250 mcg gives 20 draws; the remainder stays in the vial.
What if the result falls between pen clicks?
The calculator shows the exact arithmetic, warns that the setting cannot be selected and blocks the label. It does not round to a different dose. Check an appropriate device and product-specific preparation with a pharmacist.
The units come out very small. What should I change?
Do not guess, round the dose or add extra water for a convenient setting. Check the figures, product instructions and suitable measuring equipment with a pharmacist.