DoseRoutine

TB-500 Dosage Calculator

TB-500 is dosed in milligrams rather than micrograms, so draws are larger than most peptides — but the reconstitution maths is identical. Enter your vial and target dose below.

This is a unit converter. It converts an amount you already have into volume and syringe units. It does not tell you what to take, and it is educational only — not medical advice. Confirm every amount with your clinician and your product label.

Common setups

Vial size (mg)

Total compound in the vial.

BAC water added (mL)

Volume of bacteriostatic water you reconstitute with.

Target dose

Per-injection dose you want to draw.

Syringe type

U-100 = 100 units per mL (standard). U-40 = 40 units per mL.

Draw

80.0 units

on a U-100 insulin syringe (0.800 mL)

Concentration

2.50 mg/mL

Per dose

2.00 mg

Doses / vial

~2

TB-500 concentration reference (mg/mL)

What each vial size becomes at common bacteriostatic water volumes.

Vial	+ 1 mL	+ 2 mL	+ 3 mL	+ 5 mL
2 mg	2.00 mg/mL	1.00 mg/mL	0.67 mg/mL	0.40 mg/mL
5 mg	5.00 mg/mL	2.50 mg/mL	1.67 mg/mL	1.00 mg/mL
10 mg	10.00 mg/mL	5.00 mg/mL	3.33 mg/mL	2.00 mg/mL

TB-500 dosing at a glance

Phase	Dose	Frequency	Notes
Loading	2–5 mg	Twice weekly	Typically run for 4–6 weeks in anecdotal protocols.
Maintenance	2–5 mg	Every 1–2 weeks	Lower frequency after the loading period.
Common pairing	—	With BPC-157	Frequently stacked; calculate each peptide separately.
Cycle length	—	6–12 weeks	No human trial data supports any specific duration.

Reference ranges reported in the literature and in common practice — not a prescription, and not personalised advice.

What trips people up

5 mg + 2 mL = 2.5 mg/mL, so a 2 mg dose is 80 units — most of a U-100 syringe.
If the draw exceeds 100 units you cannot fit it in one U-100 syringe. Use less BAC water or split the injection.
TB-500 has a long half-life, which is why protocols dose twice weekly rather than daily.
Blended BPC-157/TB-500 vials must be calculated per peptide — the label weight is the sum of both.

How the maths works

Concentration (mg/mL) = vial mg ÷ bacteriostatic water mL.
Volume per dose (mL) = dose mg ÷ concentration.
Syringe units = volume × 100 on a U-100 syringe, or × 40 on a U-40 syringe.
Doses per vial = vial mg ÷ dose mg. Water volume never changes this number.

TB-500 calculator FAQ

How much BAC water for a 5 mg TB-500 vial?

2 mL is standard, giving 2.5 mg/mL. On that a 2 mg dose is 80 units and a 2.5 mg dose is a full 100-unit syringe. Use 1 mL if you want half the volume per injection.

How many units is 2 mg of TB-500?

At 2.5 mg/mL it is 0.8 mL = 80 units on a U-100 syringe. At 5 mg/mL (5 mg + 1 mL) the same dose is 40 units.

How often should TB-500 be injected?

Most protocols use twice weekly during a loading phase, then weekly or fortnightly for maintenance, because the peptide has a notably long half-life compared with BPC-157.

Can TB-500 and BPC-157 go in the same syringe?

People commonly draw both into one syringe, but you must calculate the units for each peptide separately and add them — never treat a blended label weight as a single peptide.

TB-500 reference page Check interactions BPC-157 vs TB-500

Educational tool only — not medical advice. Verify every dose with your prescriber and follow sterile technique. See our medical disclaimer.

More free DoseRoutine calculators and dosing references.