Tools / Calculator
From a weekly dose
to a syringe mark.
Enter the weekly dose your clinician prescribed, the concentration printed on your vial, and how many injections you split it into. The maths is the same for cypionate, enanthate or any other ester.
PER INJECTION
— unitsMilligrams per injection—
Injections per vial—
Weeks per vial—
Dose is your prescriber’s call. This only converts it.
How it’s calculated
mg per injection = weekly mg ÷ injections per week mL per injection = mg per injection ÷ vial concentration (mg/mL) units (U-100) = mL per injection × 100 injections / vial = vial mL ÷ mL per injection
Assumptions and limits
- Concentration is read from your vial label. Common US presentations are 100 mg/mL and 200 mg/mL cypionate; compounded products vary.
- Units assume a U-100 insulin syringe (100 units = 1 mL). A 3 mL syringe is marked in mL, not units.
- This converts a dose; it does not choose one. Weekly dose and split frequency are your clinician’s decision based on bloodwork.
Read this first
This tool does arithmetic on numbers you enter. It is not a diagnosis, a prescription or a treatment recommendation. Take the result to a licensed clinician.
References
Regulatory and primary sources
- DailyMed: testosterone cypionate injection labeling ↗ · approved strengths and administration
Published literature
- Pharmacokinetics, safety, and patient acceptability of subcutaneous versus intramuscular testosterone injection for gender-affirming therapy: A pilot study.Am J Health Syst Pharm 2018.PubMed 29367424 · doi:10.2146/ajhp170160
- Propranolol metabolism in normal subjects: association with sex steroid hormones.Clin Pharmacol Ther 1994.PubMed 8062488 · doi:10.1038/clpt.1994.115
Literature retrieved from PubMed on October 18, 2026, favouring human studies and reviews. Numbered markers in the text show which paper supports which statement; uncited entries are background reading.