TB-500 calculator
Enter your TB-500 vial size, the water you added, and a dose. PepExact returns the exact units on a U-100 insulin syringe — and shows the arithmetic behind it.
The fields below are generic example numbers, filled in so you can see the calculator work — they are not a recommended TB-500 dose. Clear them and enter your own vial size, water, and dose.
Your draw
10 units
on a U-100 insulin syringe · 0.1 mL
Concentration
2.5 mg/mL
2,500 mcg/mL
Volume per dose
0.1 mL
Doses in this vial
20
at 250 mcg each
Show the math
- 1. Concentration: 5 mg ÷ 2 mL = 2.5 mg/mL (2,500 mcg/mL)
- 2. Volume for one dose: 250 mcg ÷ 2,500 mcg/mL = 0.1 mL
- 3. Syringe units (U-100): 0.1 mL × 100 units/mL = 10 units
- 4. Doses in the vial: 5,000 mcg ÷ 250 mcg = 20 full doses
Keep this vial on your phone
PepExact for iPhone saves your vial, renders the syringe, and counts doses left — even offline.
About this calculator
TB-500 is a synthetic peptide related to a fragment of thymosin beta-4, a protein that occurs naturally in the body. It has been examined in laboratory research.
TB-500 vials are commonly labelled in milligrams — for example 2 mg, 5 mg, or 10 mg. Enter whatever your vial actually says and the calculator handles the rest.
Whatever the compound, this page only does arithmetic. It turns a vial size in milligrams, the water you add in millilitres, and a dose into the number of units on a U-100 insulin syringe — and shows every step. It does not know, store, or suggest what any dose should be.
The most common measurement slip is milligrams versus micrograms: 1 mg is 1,000 mcg. Keep the unit switch on the dose field set to whatever your number is actually written in, and the arithmetic stays honest.
Primary sources
PepExact does not assess whether any compound works or is appropriate for anyone. These registries are the record for research and regulatory status.
Common questions
How do I calculate TB-500 syringe units?
Concentration is vial milligrams ÷ water millilitres; volume is your dose ÷ that concentration; units are volume in mL × 100 on a U-100 insulin syringe. PepExact runs all three steps and shows the working.
How much water should I use to reconstitute TB-500?
The water volume is your choice and changes only the concentration, not how much peptide is in the vial. More water makes each draw larger and easier to read; less water makes it smaller. The reconstitution calculator solves for the water volume that lands a dose on a round number of units.
Why do TB-500 unit counts differ between calculators?
Usually a different water volume, a different syringe type, or a mix-up between mg and mcg. Because PepExact shows every step, you can see which number produced the result instead of trusting it blindly.
Does PepExact recommend a TB-500 dose?
No. It is a measurement calculator only. It converts a vial, a water volume, and a dose you already have into syringe units, and never suggests a dose.
Related tools
PepExact is a measurement tool, not medical advice. It never suggests what or how much of TB-500 — or anything else — to take; it only does the arithmetic on numbers you already have.