How to Use the Peptide Calculator
This guide explains each calculator field and how to read the result as educational math.
Step-by-step use
Choose the syringe size, vial quantity, amount of bacteriostatic water added, and selected calculation amount. Custom fields are available when the preset values do not match the arithmetic example you want to study.
After values are entered, read the U-100 marking in the result sentence and the syringe fill illustration. The illustration uses the selected syringe capacity. Check any capacity warning before interpreting the result.
Check the input units with a worked example
Enter 10 for a 10 mg vial, 2 for a 2 mL volume, and 500 for a selected amount of 500 mcg. The calculation is 10,000 mcg / 2 mL = 5,000 mcg/mL, then 500 / 5,000 = 0.1 mL, or 10 U-100 units.
If an amount is written as 0.5 mg, convert it to 500 mcg before entering it in the mcg field. Entering 0.5 in that field instead creates a result 1,000 times smaller.
Reading results carefully
The mL result is a volume calculation. The U-100 unit result is the same volume expressed on a U-100 insulin syringe scale. Neither result confirms appropriateness, safety, legality, purity, or sterility.
For any medication or injectable product, consult a licensed healthcare professional or pharmacist.
Frequently asked questions
Which value belongs in the vial quantity field?
Enter the total mass in the vial in mg. This is different from concentration in mg/mL and from the selected amount in mcg.
Why does changing syringe size leave the units unchanged?
U-100 markings use the same volume scale across syringe capacities. Changing capacity affects the fill illustration and capacity warning, not the volume needed for the selected amount.
What does a result above syringe capacity mean?
The calculated volume is greater than the selected syringe can hold. Check the entered units and values. The warning does not tell you to divide or administer an amount.