Peptide Dosage Chart: Units, mg/mcg & Reconstitution Math
By James Li, Lead Editor · Updated · Reviewed
Quick answer
This chart converts a peptide between milligrams, micrograms, and syringe units, and ten units on a U-100 syringe is always 0.1 mL, while how many micrograms sit in that 0.1 mL depends on the concentration, which is vial milligrams divided by water milliliters.
Doubling the water cuts the amount in each unit in half, and the rows are round samples so the pattern is easy to see rather than amounts anyone should measure.
Blends
Optional. Extra peptides are added to the vial total.
Waiting on Input
5 mg vial, 2 mL water, 250 mcg. Example only, not a dose.
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Illustrative arithmetic only, not a recommendation. The result for Peptides (general) uses only the numbers you type.
How do you read a Peptides (general) unit conversion chart?
Read the table as arithmetic for a peptide rather than as a list of amounts to measure.
Each row starts from a sample vial and a sample water volume and then shows the concentration that division produces, ten units is always 0.1 mL on a U-100 syringe, the micrograms inside those ten units change when the water volume changes, and you put your own label numbers in the calculator when you want a mark for your vial.
How do you convert Peptides (general) mg to mcg?
For a peptide, multiply milligrams by 1,000 to get micrograms.
That conversion does not produce a syringe mark, because units measure volume and you still divide the micrograms you want to measure by the micrograms in each milliliter.
How many syringe units equal a given Peptides (general) amount?
A U-100 syringe marks 100 units per milliliter, so each unit is 0.01 mL, and that definition does not change with the barrel.
A 30-unit barrel holds 0.3 mL, a 50-unit barrel holds 0.5 mL, and a 100-unit barrel holds 1 mL, so if the calculated draw is larger than the barrel you selected it does not fit in one syringe and the calculator says so.
How does BAC water volume change concentration?
Concentration in mg/mL is the milligrams of a peptide divided by the milliliters of water.
There is no required volume, because more water spreads the same milligrams across more marks, which is easier to read when the amount you measure is small, while less water packs more into each unit and makes a small draw harder to see on the barrel.
Worked example: entering your own numbers into the calculator
Walk the sample in order by dividing vial milligrams by water milliliters, converting the amount you want to measure into micrograms, dividing by the concentration in mcg/mL, and then multiplying the milliliters by 100 for a U-100 mark.
These are sample numbers only and not a dose: 15 mg in 3 mL is 5 mg/mL, or 5,000 mcg/mL, and measuring 300 mcg from that mix is 0.06 mL, which is 6 units on a U-100 syringe.
Unit math
Illustrative arithmetic only. Not a dose. Barrel columns use a U-100 scale, 100 units per mL.
| Vial mg | Water mL | mg/mL | mcg/mL | mcg in 10 units |
|---|---|---|---|---|
| 15 | 3 | 5 | 5,000 | 500 |
| 5 | 1 | 5 | 5,000 | 500 |
| 10 | 2 | 5 | 5,000 | 500 |
| mL | 1 mL barrel (U-100 scale) | 0.5 mL barrel (U-100 scale) | 0.3 mL barrel (U-100 scale) |
|---|---|---|---|
| 0.05 | 5 | 5 | 5 |
| 0.1 | 10 | 10 | 10 |
| 0.25 | 25 | 25 | 25 |
| 0.5 | 50 | 50 | 50 (past barrel) |
| 1 | 100 | 100 (past barrel) | 100 (past barrel) |
FAQ
How much are peptides?
Pharmacy prices and insurance coverage sit outside this calculator, which is free and only converts the numbers you enter.
How much do peptides cost?
Pharmacy prices and insurance coverage sit outside this calculator, which is free and only converts the numbers you enter.
How much are peptide injections?
Pharmacy prices and insurance coverage sit outside this calculator, which is free and only converts the numbers you enter.
Is Peptides (general) FDA approved?
Some peptide drugs are FDA-approved and some are not, so look up the specific name.
How do I use the Peptides (general) calculator?
Type the milligrams on the vial, the milliliters of water you added, and the amount you want to measure, and the syringe mark updates in the calculator.
Sources
- Drugs@FDA, FDA
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