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PEPTIDESUNCENSORED

Reconstitution math

Vial mass, water volume, amount per draw. See the concentration and where it lands on a U-100 syringe. It is arithmetic, and only arithmetic.

Read this first

Arithmetic only. Not a protocol.

  • It only divides.This page converts the numbers you type. It has no idea what anyone should use, how often, or whether to use anything.

  • The vial is unverified.Gray-market products are not checked for purity or for how many mg are actually inside. If the label is off, every result here is off with it.

  • Sterile technique is a medical skill.Mixing and injecting carry infection, contamination and measuring risks. A calculator removes none of them.

  • Nothing here says what anyone should use.The amount per draw is whatever gets typed in. It is not a dose, a suggestion or a range. Real decisions belong with a licensed clinician.

Inputs

Pre-filled with example values so the diagram has something to show. They are not a suggestion.

Example values
10units· 0.1 mLSyringe

As printed on the label. Not verified by anyone.

mg

Total volume of liquid added to the vial.

mL

Any number, to see how it converts. Not a dose.

mcg
1 mg = 1,000 mcg. Mixing them up is the most common error in this math.
Syringe size

U-100 insulin syringes: 100 units = 1 mL

Result

Example values

Syringe reading

10units

= 0.1 mL on a U-100 syringe

Concentration
2.5 mg/mL
2,500 mcg/mL
One unit mark holds
25 mcg
0.01 mL per unit
Draw volume
0.1 mL
of 1 mL capacity
Draws per vial
20
Pure division. Real yield is lower.
102030405060708090100U-100 · 1 mL10 u

Unit marks are volume marks. The result assumes the vial holds exactly what its label says, which gray-market products do not guarantee.

How the math works

Three divisions and one multiplication.

The formulas below update with the numbers above. Nothing is hidden, and nothing is added: no rounding to a "nice" dose, no adjustment for losses.

  1. 01

    Concentration

    C = vial mg ÷ water mL

    5 mg ÷ 2 mL = 2.5 mg/mL

    Multiply by 1,000 for mcg/mL: 2,500.

  2. 02

    Draw volume

    V = amount ÷ C

    250 mcg ÷ 2,500 mcg/mL = 0.1 mL

    Keep both sides in the same unit (mcg with mcg/mL, or mg with mg/mL).

  3. 03

    Syringe units

    U = V × 100

    0.1 mL × 100 = 10 units

    U-100 means 100 units per mL. On these syringes a unit is a volume mark, not an amount of drug.

  4. 04

    Draws per vial

    N = vial content ÷ amount

    5 mg ÷ 250 mcg = 20

    Pure division. Liquid left in the vial and the needle hub makes the real number lower.

Next

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