The calculator looks like it's doing something complicated. It isn't. Three small numbers, four short steps. Once you see them written out, the output stops feeling like a black box.
Open the Peptide Calculator → Enter vial strength, BAC water volume, and your target research amount.
What This Means in Simple Terms
Concentration is just amount divided by volume. The amount comes from the vial. The volume comes from the BAC water you added. The draw is the target research amount divided by that concentration. The unit reading is the draw multiplied by 100.
What You Need Before You Calculate
- Vial strength in mg.
- BAC water volume in mL.
- Target research amount in mcg.
- A U-100 syringe (100 units = 1mL).
The Simple Formula
Step 1. Convert mg to mcg: 1mg = 1,000mcg.
Step 2. Concentration (mcg/mL) = total mcg ÷ BAC water mL.
Step 3. Draw volume (mL) = target mcg ÷ concentration.
Step 4. Syringe units = draw mL × 100.
Practical Example
10mg vial, 2mL BAC water, 250mcg target:
- 10mg = 10,000mcg.
- 10,000 ÷ 2 = 5,000mcg/mL.
- 250 ÷ 5,000 = 0.05mL.
- 0.05 × 100 = 5 units.
Same vial, 500mcg target: 0.1mL → 10 units. Same vial, 1,000mcg target: 0.2mL → 20 units. The math scales linearly.
Skip the math — run it in the Peptide Calculator and see the syringe reading instantly.
Concentration Quick Reference (with 2mL BAC water)
- 2mg vial → 1,000mcg/mL
- 5mg vial → 2,500mcg/mL
- 10mg vial → 5,000mcg/mL
- 20mg vial → 10,000mcg/mL
- 50mg vial → 25,000mcg/mL
Common Mistakes to Avoid
- Skipping the mg → mcg conversion.
- Dividing mg by mL and reading the answer as mcg.
- Forgetting to multiply by 100 for syringe units.
- Using a non-U-100 syringe without adjusting the unit-to-mL ratio.
- Rounding too aggressively on small draws.
When to Use the Peptide Calculator
Whenever any of the three inputs changes. Different vial strength, different BAC water volume, different target — recalculate. Doing it in your head is slow and error-prone. The calculator runs the four steps the moment you finish typing.
FAQ
How do I convert mg to mcg for peptides?
Multiply by 1,000. 1mg = 1,000mcg, 5mg = 5,000mcg.
What does 100 units mean on a U-100 syringe?
100 units = 1mL. Each unit = 0.01mL.
How do I calculate peptide concentration?
Total mcg in the vial ÷ mL of BAC water added.
Does the formula change for different peptides?
No. The math is identical for any peptide. Only the vial strength changes.
Why use mcg instead of mg in the final answer?
Most research calculation amounts are too small to read cleanly in mg.
What if I use a U-40 or U-50 syringe?
Adjust the unit-to-mL ratio. U-40 = 40 units per mL. U-50 = 50 units per mL. The calculator can be set to match.
Skip the math — use the Peptide Calculator to get the final syringe reading instantly.