Somira Health · U-100 syringe guide
Your prescribed dose. Visualized.
Enter the details from your current prescription to see the corresponding syringe marking. This tool converts a dose; it does not choose or approve one.
Review prototype · Clinical and pharmacy approval required before patient use.
The interactive calculator has not started in this view. Ask your dispensing pharmacy to confirm the volume and syringe marking before use.
A clearer way to check.
Your calculation and illustration will appear here after you enter and confirm your prescription details.
Calculated U-100 marking
units
mL of the entered concentration
Close-up of the same scale · units
Check against your pharmacy instructions. If they differ, contact your pharmacist before injecting. A matching calculation does not confirm that the entered dose is appropriate for you.
What “units” means here
A U-100 scale corresponds to 100 syringe units per 1 mL, so 1 syringe unit represents 0.01 mL. These are volume markings in this tool, not units of semaglutide or tirzepatide strength.
Calculation: prescribed mg ÷ concentration in mg/mL = volume in mL. Volume × 100 = the U-100 marking. The same arithmetic applies to either selected medication.
This tool does not work for U-40 or U-500 syringes, insulin doses, pens or pen clicks. It does not calculate reconstitution, dilution, dose changes or injection schedules.
When a marking cannot be shown
No line is displayed when entries are missing or invalid, when the volume exceeds the selected syringe capacity, or when the calculated amount falls between its printed lines. The tool does not round, recommend estimating, or suggest splitting a dose.
Ask your pharmacist to confirm the prescription and appropriate syringe. Do not change your dose, concentration or chosen markings to force a result.
Calculation reference
The U-100 conversion and need to match concentration and syringe size are described in FDA’s compounded semaglutide measurement guidance (opens in a new tab). This reference is not validation or approval of this calculator.
Use only the prescription for your current vial. This arithmetic aid does not verify the medication, concentration, prescribed dose, syringe, diagnosis or treatment eligibility. It does not replace pharmacist instruction or complete medication safety information.