What does this calculator calculate?

It converts the entered vial amount, liquid volume, and requested amount into concentration, mL, and U-100 syringe units.

Is 1 mg the same as 1 mcg?

No. One milligram equals 1,000 micrograms.

Why does the result change when I add more liquid?

The total amount in the vial stays the same, but the concentration per milliliter changes.

What does one unit mean?

On a U-100 insulin-style syringe, one unit equals 0.01 mL.

Can I use a 0.3 mL, 0.5 mL, or 1 mL syringe?

Yes. Select the exact syringe size being used so the visual and maximum capacity are correct.

Does this calculator choose an amount for me?

No. It only calculates the numbers entered by the user.

Does this replace professional guidance?

No. It is only a mathematical and educational measurement tool.

Free tool · No login required

Peptide Calculator

by DOZED by Peppy&Me

Simple concentration and syringe measurement calculator.

Important: This calculator is provided for educational, informational, and mathematical purposes only. It does not provide medical advice, diagnosis, treatment, prescribing, administration instructions, or a recommendation to use any compound. Users are responsible for verifying all entries, units, product labels, syringe markings, and calculations with an appropriately qualified professional.

Step 1

Choose your syringe

What size syringe are you using?

Step 2

Enter the vial amount

How much compound is in the vial?

Step 3

Enter the liquid added

How much liquid are you adding to the vial?

Step 4

Enter the amount per measurement

How much do you want in each measurement?

Result

Draw to 10.00 units

on a U-100 insulin-style syringe

Volume

0.100 mL

Amount

500 mcg

Conc.

5.000 mg/mL

Conc.

5,000 mcg/mL

Doses / vial

Syringe

1 mL

Based on the numbers entered, the selected amount equals 10.00 units on a U-100 insulin-style syringe.

Dynamic Syringe View

1 mL U-100 Insulin

Draw to 10 units (0.100 mL)

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How the calculator works

1. Choose the syringe

Select the total size printed on your syringe.

2. Enter the vial amount

Enter the total amount shown on the vial.

3. Enter the liquid volume

Enter the total amount of liquid added.

4. Enter the amount to calculate

The calculator converts the amount into mL and U-100 syringe units.

mg and mcg are different

1 mg = 1,000 mcg
5 mg = 5,000 mcg
10 mg = 10,000 mcg

Why liquid volume matters

Adding more liquid does not change the total amount in the vial. It changes how much compound is present in each milliliter.

What syringe units mean

100 units = 1 mL
50 units = 0.5 mL
30 units = 0.3 mL

Common mistakes

• Mixing up mg and mcg

• Choosing the wrong syringe size

• Entering the wrong liquid volume

• Confusing mL with syringe units

• Forgetting that different syringes have different maximum capacities

• Rounding the result too early

Frequently asked questions

Preparation supplies

Helpful supplies users may want for organizing and preparing their materials. These are external Amazon links.

Affiliate disclosure: Some links on this page may be affiliate links. Peppy&Me may earn a commission from qualifying purchases at no extra cost to you.