How to Use a Peptide Calculator

Before entering any numbers

Collect the total labeled mass, the instructed final liquid volume, the target mass already supplied by an appropriate source, and the exact syringe scale. Stop if any label or instruction is unclear.

Step 1: enter the total vial mass

Enter the complete amount shown for the vial, then choose mg or mcg. Do not enter a concentration in this field. One milligram equals 1,000 micrograms.

Step 2: enter the liquid volume

Enter the volume in milliliters. The calculator divides the total vial mass by this value to determine concentration. It cannot verify whether the entered liquid or volume is suitable.

Step 3: enter a target mass you already know

Choose mg or mcg carefully. The calculator does not generate, look up, or validate this target. A unit mismatch at this step changes the result by a factor of 1,000.

Step 4: match the syringe scale

Select the syringe capacity and the smallest visible marking. The tool uses a U-100 volume convention of 100 markings per mL. These markings are not IU of potency.

Step 5: compare the exact and visible results

Read the exact mL value first. If it falls between visible syringe lines, the tool reports the nearest line separately and displays a warning. It does not decide whether rounding is acceptable.

Worked arithmetic example

1. 10 mg is converted to 10,000 mcg.
2. 10,000 mcg ÷ 2 mL = 5,000 mcg/mL.
3. 250 mcg ÷ 5,000 mcg/mL = 0.05 mL.
4. 0.05 mL × 100 = 5 U-100 volume markings.
5. 10,000 mcg ÷ 250 mcg = 40 theoretical portions.

Final checklist

• Re-read every source label and instruction.
• Confirm mg versus mcg for both mass inputs.
• Confirm the selected syringe is actually marked on a U-100 scale.
• Do not treat a nearest-marking display as a recommendation.
• Ask a qualified professional to resolve any uncertainty.

Ready to calculate? Open the free peptide calculator, or inspect the complete equations and precision rules.