Compounded Semaglutide: How Many Units?
Compounded semaglutide comes in different strengths, so “0.25 mg” is a different number of units on every vial. Enter your concentration and dose to get the exact units to draw — and save your concentration so you never work it out again.
1. Your vial concentration
Printed on the vial or your pharmacy paperwork, in mg/mL (e.g. “5 mg/mL”).
2. Your prescribed dose
Read before you draw
- Use the concentration printed on your vial. Compounded semaglutide is made at different strengths, and using the wrong number causes a wrong dose.
- This assumes a standard U-100 insulin syringe (100 units = 1 mL). Confirm your syringe type.
- Always follow the exact instructions from your prescriber and compounding pharmacy — they override this tool.
- Compounded semaglutide is not an FDA-approved product. Double-check every dose; unit errors are a known cause of overdose.
Educational unit-conversion aid only — not medical advice, a prescription, or an endorsement of compounded semaglutide. Talk to a licensed clinician and your pharmacy about your dose.
The one formula behind it
Branded pens (Ozempic, Wegovy) dial your dose for you. A compounded vial doesn't — you draw the liquid yourself with an insulin syringe, so you need to turn milligrams (your dose) into units (the marks on the syringe).
units = (dose in mg ÷ concentration in mg/mL) × 100
because a U-100 insulin syringe holds 100 units per mL
Worked example: a 0.25 mg dose from a 5 mg/mL vial is 0.25 ÷ 5 = 0.05 mL, and 0.05 mL × 100 = 5 units. Change the concentration and the units change — that's exactly why using the number on your own vial matters.
A word on compounded semaglutide
Compounded semaglutide is not FDA-approved. Strength and quality vary by pharmacy, and drawing doses by hand introduces room for error — mg-to-unit mistakes are a documented cause of accidental overdose. Only use it under a licensed prescriber and pharmacy, follow their exact instructions, and double-check every dose. This page is an educational conversion aid, not advice to use compounded medication.
Frequently Asked Questions
Common questions and answers about this calculator.
How do I convert my compounded semaglutide dose to units?
Divide your dose in milligrams by the vial's concentration in mg/mL to get the volume in millilitres, then multiply by 100 (because a U-100 insulin syringe has 100 units per mL). Example: 0.25 mg ÷ 5 mg/mL = 0.05 mL = 5 units. The calculator above does this for your exact vial.
Where do I find my vial's concentration?
It's printed on the vial label or your pharmacy paperwork, usually as mg/mL (for example '5 mg/mL') or as a total amount in a total volume (e.g. '10 mg in 2 mL' = 5 mg/mL). Always use the number on your own vial — compounded semaglutide is made at different strengths.
How many units is 0.25 mg of compounded semaglutide?
It depends entirely on your vial's concentration. At 5 mg/mL it's 5 units; at 2.5 mg/mL it's 10 units; at 10 mg/mL it's 2.5 units. Enter your concentration above to get the right number for your vial.
Is this the same as Ozempic or Wegovy dosing?
The active drug (semaglutide) and the standard dose ladder (0.25 → 0.5 → 1.0 → 1.7 → 2.4 mg) are the same, but branded pens dial a fixed dose for you. Compounded vials require you to draw the volume yourself with an insulin syringe, which is why the mg-to-units conversion matters.
Is compounded semaglutide FDA-approved?
No. Compounded semaglutide is not an FDA-approved product, and formulations, strengths, and quality vary by pharmacy. Only use it under the guidance of a licensed prescriber and pharmacy, and follow their exact instructions. This tool is an educational unit-conversion aid, not an endorsement.
Sources
- Wegovy (semaglutide) Prescribing Information — U.S. FDA (standard dose ladder)
- Compounding and the FDA: Questions and Answers — U.S. FDA (compounded drugs are not FDA-approved)
Tool Information
July 24, 2026
Dr. Jaydeep Sanghani
Meet Akabari
Dr. Jaydeep Sanghani
MBBS, MD, DNB(Anaesth.), PDCC(CCM), DrNB(CCM)
AIIMS Bhubaneswar · AIIMS Rishikesh
Critical care specialist and anesthesiologist with advanced training from AIIMS. Reviews health calculators at Calqulate to ensure medical accuracy and evidence-based standards.