100mcg to ML & Syringe Units Calculator
Convert 100mcg, 250mcg, 500mcg or any peptide dose to ml and syringe units. Instant calculation based on your reconstitution.
The Formula
On a U-100 insulin syringe, 100 units = 1 ml. So we multiply by 100 to convert ml to units.
Convert Your Dose
Enter your vial info and desired dose
Total peptide in your vial
How much water you added
Enter your known concentration
Draw This Many Units
10
units on your syringe
Your Concentration
2500 mcg/ml
Volume to Draw
0.10 ml
Draw to 10 units:
Standard 100-unit (U-100) insulin syringe
100mcg to ML
With standard 5mg/2ml reconstitution (2500 mcg/ml):
100mcg = 0.04 ml = 4 units
Formula: 100 ÷ 2500 = 0.04 ml × 100 = 4 units
250mcg to Units Syringe
With standard 5mg/2ml reconstitution (2500 mcg/ml):
250mcg = 0.10 ml = 10 units
Formula: 250 ÷ 2500 = 0.10 ml × 100 = 10 units
500 MCG in Units
With standard 5mg/2ml reconstitution (2500 mcg/ml):
500mcg = 0.20 ml = 20 units
Formula: 500 ÷ 2500 = 0.20 ml × 100 = 20 units
100mcg in ML
With higher 5mg/1ml reconstitution (5000 mcg/ml):
100mcg = 0.02 ml = 2 units
Formula: 100 ÷ 5000 = 0.02 ml × 100 = 2 units
Quick Reference: Common Reconstitutions
5mg vial + 2ml water = 2,500 mcg/ml
Most common reconstitution for BPC-157, Ipamorelin, etc.
| Dose (mcg) | Units to Draw | Volume (ml) |
|---|---|---|
| 100 mcg | 4 units | 0.04 ml |
| 200 mcg | 8 units | 0.08 ml |
| 250 mcg | 10 units | 0.10 ml |
| 300 mcg | 12 units | 0.12 ml |
| 500 mcg | 20 units | 0.20 ml |
5mg vial + 1ml water = 5,000 mcg/ml
Higher concentration, fewer injections per vial
| Dose (mcg) | Units to Draw | Volume (ml) |
|---|---|---|
| 100 mcg | 2 units | 0.02 ml |
| 200 mcg | 4 units | 0.04 ml |
| 250 mcg | 5 units | 0.05 ml |
| 300 mcg | 6 units | 0.06 ml |
| 500 mcg | 10 units | 0.10 ml |
10mg vial + 2ml water = 5,000 mcg/ml
Common for larger vials (TB-500, some GH peptides)
| Dose (mcg) | Units to Draw | Volume (ml) |
|---|---|---|
| 100 mcg | 2 units | 0.02 ml |
| 250 mcg | 5 units | 0.05 ml |
| 500 mcg | 10 units | 0.10 ml |
| 1000 mcg (1mg) | 20 units | 0.20 ml |
| 2500 mcg (2.5mg) | 50 units | 0.50 ml |
How This Conversion Works
Find your concentration
Divide your vial's total mcg by the ml of water you added. A 5mg (5000mcg) vial with 2ml water = 2500 mcg/ml concentration.
Calculate the volume
Divide your desired dose by the concentration. 250mcg ÷ 2500 mcg/ml = 0.1 ml
Convert to syringe units
On a U-100 syringe, multiply ml by 100 to get units. 0.1 ml × 100 = 10 units to draw.
Frequently Asked Questions
It depends on your concentration! With a typical 5mg vial reconstituted with 2ml water (2500 mcg/ml), 100mcg = 4 units. With 5mg/1ml (5000 mcg/ml), 100mcg = 2 units. Use the calculator above with your specific reconstitution.
Micrograms (mcg) measure mass/weight, while milliliters (ml) measure volume. They're different types of measurements. The concentration (how much peptide per ml of liquid) is what connects them. That's why knowing your reconstitution is essential.
On a U-100 insulin syringe (the standard type used for peptides), the markings are in "units" where 100 units = 1 ml. So 10 units = 0.1 ml, 50 units = 0.5 ml, etc. The syringe typically shows marks at every 1 or 2 units for precision.
The most common reconstitution for a 5mg vial is 2ml of bacteriostatic water, giving 2500 mcg/ml. This makes dosing math easy (250mcg = 10 units). Some prefer 1ml for higher concentration (fewer injections per vial, but harder to measure small doses precisely).