mg ↔ units

TB-500 mg to units converter

Set your TB-500 vial concentration once, then flip in either direction between milligrams and U-100 syringe units.

iPhone · Free to download

Last updated: May 13, 2026

Vial (mg)

Diluent (mL)

Dose (mg)

2.000

units

80.0

0.800

Concentration: 2.50 mg/mL (assumes a U-100 insulin syringe).

TB-500 quick reference: mg ↔ units

Bidirectional reference for a 5 mg TB-500 vial reconstituted with 2 mL BAC water (concentration 2.50 mg/mL).

Dose (mg)	Dose (mcg)	U-100 units
1	1000	40
2	2000	80
4	4000	160
8	8000	320

Read across in either direction. The mg ↔ units relationship is linear at a fixed concentration — change vial size or BAC water and every row in this table moves.

Worked example

TB-500 mg ↔ units, both directions on one vial

Working from one 5 mg TB-500 vial mixed with 2 mL of bacteriostatic water → 2.50 mg/mL.
mg → units: 2 mg ÷ 2.50 × 100 = 80 units.
units → mg: 80 units ÷ 100 × 2.50 = 2 mg — round-trip exact, that's how you sanity-check a logged value.
mcg flip: 2 mg = 2000 mcg, useful when the protocol writes the dose below the 1 mg threshold.
Every row here is specific to this vial; reconstitute with a different volume and you start from a different concentration.

Scenarios people actually run into

Three things that come up logging TB-500

Protocol says 2 mg. Syringe says 80 units. Those are the same draw on this vial — and only on this vial.
Someone online says "TB-500 dose is 20 units." That number is meaningless without their vial mg and their diluent mL. Ignore the units number and convert from the mg.
Logged a dose in units last week and a dose in mg today. The mg ↔ units flip on this page is how you confirm both entries describe the same actual draw.

Same-category neighbor

TB-500 next to BPC-157

Both sit in the Healing bucket — here's the mg to-units math side by side on each one's example vial.

	TB-500	BPC-157
Example dose	2 mg	0.25 mg
Concentration	2.50 mg/mL	2.50 mg/mL
Units to draw	80	10

Want the full breakdown? BPC-157 reference →

TB-500 is a synthetic fragment of the natural protein Thymosin Beta-4 that people use to support recovery from soft-tissue and tendon injuries. It works by promoting cell migration and new blood-vessel formation at injury sites, which is what allows damaged tissue to rebuild faster. Animal studies show meaningful acceleration of wound and tendon healing; controlled human data is limited. This page covers reconstitution math and how people typically log a loading-then-maintenance schedule.

How the TB-500 mg ↔ units converter works

TB-500 protocols usually write doses in mg (2, 2.5, 5), and the unit counts get larger than most peptides. This converter handles the mg-to-units math so you can verify a 5 mg dose really is 200 units (two 100-unit draws) before splitting it.

The formula in both directions: mg = mL × concentration mg/mL, and units = mL × 100 on a U-100 syringe. With a 2.5 mg/mL TB-500 solution, 2 mg comes out to 80 units, and 80 units comes out to 2 mg. The converter handles the unit flip automatically so you never multiply or divide in your head while holding a syringe.

Concentration is the input that changes the answer most. A 5 mg vial diluted with 1 mL is twice as concentrated as the same vial diluted with 2 mL, which means the same dose draws half as many units. That is the single biggest source of converter confusion: a remembered unit count from an old vial does not transfer to a new vial reconstituted with different water volume.

Tracking TB-500 unit counts

When implementing a twice-weekly protocol, the most important detail to log is the strict adherence to the chosen administration days to maintain a consistent interval. A common deviation is schedule drift, where a missed Thursday dose is taken on Friday, and the subsequent dose shifts from Monday to Tuesday, gradually extending the time between doses. To prevent this, a log should explicitly state the intended schedule (e.g., 'Monday/Thursday') and record the actual date and time of each dose. This rigorous documentation ensures that any observed outcomes can be correlated with a consistent and verifiable administration timeline.

Common TB-500 mg ↔ units mistakes

Entering a 2.5 mg dose into a calculator field that defaults to micrograms (mcg), resulting in a miscalculation of several orders of magnitude.
Using only 1 mL of diluent for a 10 mg vial and finding the resulting solution too concentrated to measure small dose adjustments precisely on a U-100 syringe.
Assuming the same unit measurement as BPC-157 when they are stacked, leading to a significant under-dose of TB-500 due to its milligram-scale dosing.

Frequently asked questions about TB-500 mg ↔ units

What's the formula behind this TB-500 mg ↔ units converter?

Both directions use the same concentration. Going mg → units: (dose mg ÷ concentration mg/mL) × 100. Going units → mg: (units ÷ 100) × concentration. For this TB-500 example at 2.50 mg/mL, 2 mg works out to about 80 units, and the same number of units converts back to 2 mg. TB-500 is the only common healing peptide with mg-scale doses; the others are mcg-scale.

Why does my TB-500 unit count not match a number I read online?

Almost always because the other source assumed a different vial concentration. A "TB-500 dose = 20 units" tip is meaningless without knowing whether the vial was reconstituted with 1, 2, or 3 mL of water. The converter on this page asks for your actual vial mg and diluent mL so the answer reflects your vial, not someone else's. TB-500 is the only common healing peptide with mg-scale doses; the others are mcg-scale.

Does the TB-500 converter handle mcg as well as mg?

Yes — 1 mg equals 1,000 mcg, and the converter does the unit flip automatically when you switch the input. This matters for peptides where typical doses sit below 1 mg: a 250 mcg TB-500 dose displayed as 0.25 mg is the same number, just easier to read. TB-500 is the only common healing peptide with mg-scale doses; the others are mcg-scale.

When would I convert TB-500 units back to mg?

Most often when checking a dose someone else recorded. Logs and protocols sometimes write the dose in units (because it's what shows on the syringe), other times in mg (because it's what the protocol step is named). The reverse direction lets you confirm a logged unit count actually matches the planned mg target before drawing the next dose. TB-500 is the only common healing peptide with mg-scale doses; the others are mcg-scale.

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