TB-500 Reconstitution & Dosage Calculator
This free TB-500 calculator turns your vial size, the bacteriostatic water you add, and your target amount into a concentration, a draw volume, and the exact units on a U-100 insulin syringe. TB-500 is usually measured in milligrams, which can create larger draws — the calculator flags when an amount exceeds your syringe.
Quick summary
- Converts vial size (mg), bacteriostatic water (mL), and a milligram amount into concentration, draw volume, and U-100 units.
- Built for milligram TB-500 amounts, with reference math for 2, 5, and 10 mg research vials.
- Educational measurement tool only — it does not diagnose, treat, or recommend an amount.
TB-500 reconstitution calculator
Syringe
U-100 insulinPeptide in vial
Target amount
Bacteriostatic water
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What this TB-500 calculator does
This calculator does one job well: it turns your vial size, the amount of bacteriostatic water you add, and your target amount into a concentration (mg/mL), a draw volume (mL), and the matching units on a U-100 insulin syringe. Change any input and the result updates instantly.
TB-500 ships as a freeze-dried powder. Before it can be measured into a syringe it has to be reconstituted — dissolved in bacteriostatic water. How much water you add sets the concentration, and the concentration sets how many units each amount works out to. The presets above cover the most common TB-500 vial setups; use the custom fields for anything else.
How to use the TB-500 calculator
Pick your syringe
Choose the U-100 insulin syringe you'll draw with. Smaller syringes (0.3 mL / 30u) have finer lines, which helps when the draw is small.
Enter your vial and water
Set the milligrams in your TB-500 vial and the bacteriostatic water you added. Together these set the concentration.
Set your target amount
Toggle mg or mcg and pick (or type) the amount you're measuring for. The calculator does the conversion for you.
Read the draw
The result panel shows concentration, draw volume, and the exact U-100 units to pull, plus how many doses your vial contains.
TB-500 reconstitution math, explained
The math is short. Concentration = vial size ÷ bacteriostatic water. Draw volume = target amount ÷ concentration. Units = draw volume × 100 (a U-100 syringe reads 100 units per mL). The table below shows common TB-500 setups and the units for a 1 mg amount at each.
| Vial size | Bac water | Concentration | Units per 1 mg |
|---|---|---|---|
| 2 mg | 1.0 mL | 2 mg/mL | 50 units |
| 5 mg | 2.0 mL | 2.5 mg/mL | 40 units |
| 5 mg | 2.5 mL | 2 mg/mL | 50 units |
| 10 mg | 2.0 mL | 5 mg/mL | 20 units |
| 10 mg | 3.0 mL | 3.33 mg/mL | 30 units |
TB-500 amount-to-units reference
How common amounts convert to U-100 syringe units at two example concentrations. These are arithmetic conversions for reference, not a recommendation of any amount.
| Amount | Volume (mL) | U-100 units |
|---|---|---|
| 1 mg (1000 mcg) | 0.4 mL | 40 units |
| 2 mg (2000 mcg) | 0.8 mL | 80 units |
| 2.5 mg (2500 mcg) | 1 mL | 100 units |
| 5 mg (5000 mcg) | 2 mL | 200 units |
| Amount | Volume (mL) | U-100 units |
|---|---|---|
| 1 mg (1000 mcg) | 0.2 mL | 20 units |
| 2 mg (2000 mcg) | 0.4 mL | 40 units |
| 2.5 mg (2500 mcg) | 0.5 mL | 50 units |
| 5 mg (5000 mcg) | 1 mL | 100 units |
Mixing, color & storage tips
Milligram amounts, larger draws
TB-500 is dosed in milligrams, so draws are larger than microgram peptides. If a draw exceeds your syringe, add less water for a higher concentration, or split it across two pulls — the calculator warns you automatically.
A clear solution
TB-500 reconstitutes to a clear, colorless liquid. Discard the vial if it turns cloudy, discolored, or shows particles.
Loading vs maintenance
Some research references discuss a larger initial phase and a smaller ongoing phase. The calculator does not recommend a schedule — enter whatever amount you are measuring for and it returns the draw.
Storage
Refrigerate the reconstituted vial, keep it dark, and use it within a limited window. Keep the dry powder cold for longer storage; do not freeze a mixed vial.
TB-500 supplies checklist
A simple reconstitution shopping list. Confirm vial size and batch documentation before you buy.
TB-500
- Batch COA on every vial
- Third-party purity tested
- U.S. fulfillment, discreet shipping
TB-500 — frequently asked questions
What does this TB-500 calculator tell me?
It converts your vial size, bacteriostatic water volume, and target amount into concentration (mg/mL), draw volume (mL), and U-100 syringe units.
Is the TB-500 reconstitution calculator free?
Yes — free, browser-based, no signup.
How much bacteriostatic water for a 5 mg TB-500 vial?
A 5 mg vial with 2 mL of bacteriostatic water makes 2.5 mg/mL. Because TB-500 amounts are in milligrams, using less water keeps the draw within a single syringe.
How many units is 2 mg of TB-500?
At 2.5 mg/mL it is 80 units (0.8 mL). At 5 mg/mL it is 40 units. Larger milligram amounts can exceed a 1 mL (100u) syringe, so the calculator flags that.
Is TB-500 FDA-approved?
No. TB-500 is sold as a research-use-only compound and is not an FDA-approved drug.
Is this medical advice?
No. This page and calculator are for education and research planning only. Products referenced are sold strictly as research chemicals and are not for human or veterinary use.
