Peptide reconstitution calculator
A free peptide reconstitution calculator. You type in the vial amount, how much diluent you are adding, and the amount you want to draw. It works out the concentration and the matching mark on a U-100 syringe. Every number comes from you.
Pick a suggestion to fill in the name, or type your own. Your calculator numbers will not change.
Example number only. Enter your own target amount. PepCaddie does not recommend an amount.
Your dose comes from your own protocol or your provider. Not sure yet? See the guides.
syringe
Easy-Mark Assist No Easy-Mark alternative was found for these numbers.
It looks for a water amount that puts the same target on a drawn line. This is not a judgement about your numbers.
The barrel size, not the needle. Most first-timers use 1 mL (100 units).
Calculated mark: 40.0 units on a U-100 scale. Check the markings on your actual syringe.
One less thing to remember.
Your Scorecard keeps the vial amount, water amount, and target amount you entered together with the syringe mark the calculator worked out. Save or print it so you can check your numbers later.
This records what you entered. It cannot confirm what you actually added.
Change any field and the draw updates. Concentration = vial ÷ water, then units = (dose ÷ concentration) × 100.
What this calculator does
- Divides the vial amount by the diluent volume to give a concentration in mg per mL.
- Converts between mcg and mg so the units line up.
- Converts a volume into units on a U-100 syringe, which is marked in 100 units per mL.
- Shows how many equal draws of that size the vial would hold.
What it does not do
It does not choose an amount for you, check whether an amount is safe, or recommend a compound, a schedule, or a route. It is arithmetic on the values you enter, and it will convert a number that would be a bad idea just as happily as one that would not.
The values it opens with are placeholders that make the arithmetic visible. They are not a recommendation, not a starting point, and not based on any particular compound.
The arithmetic, written out
Concentration = vial amount ÷ diluent volume. Units to draw = (your amount ÷ concentration) × 100. Adding more diluent does not change how much peptide is in the vial; it changes how much liquid carries a given amount, which changes the mark on the syringe.