Last updated: June 2026
Testosterone Cypionate Dosage Calculator
Quick answer: A 140 mg/week dose over 2 shots from a 200 mg/mL vial is 0.35 mL (35 units) per shot, ≈ 98 mg active hormone/week. mL = (weekly mg ÷ shots) ÷ mg/mL.
About this calculator
Testosterone cypionate is an oil-based testosterone ester. About 70% of each milligram is actual testosterone — the rest is the cypionate ester chain that slows release. This calculator converts a weekly dose into the exact draw volume in mL and U-100 syringe units, and shows the active-testosterone milligrams delivered. esterFactor = 288.4 ÷ 412.6 = 0.7 (active Testosterone Cypionate fraction).
How to use this calculator
Enter your weekly dose, the concentration printed on your vial (mg/mL), and how many injections per week. The result updates instantly with the mL to draw, the U-100 syringe units, and the active-hormone milligrams delivered.
Worked example
Weekly dose: 140 mg · Concentration: 200 mg/mL · Injections/week: 2
70 mg/shot ÷ 200 = 0.35 mL (35 units) · active hormone ≈ 98 mg/week
How to interpret your result
The result is the volume to draw per injection and its mark on a U-100 syringe. The active-hormone figure shows how much actual Testosterone Cypionate that ester delivers — useful when comparing esters. The half-life figure is a pharmacokinetic timing reference only. For oil depots it is the absorption-limited release of the ester, not the cleared parent hormone.
Testosterone Cypionate at a glance
| Property | Testosterone Cypionate |
|---|---|
| Form | Injectable (oil/suspension) |
| Active fraction | 0.7 (esterFactor) |
| Half-life | ≈ 8 days (192 h) oil-depot half-life — FDA Depo-Testosterone label |
| Aromatises | Yes — testosterone is the canonical aromatase substrate (converts to estradiol). |
| Liver (17α-alkylated) | No (not 17α-alkylated). |
| Approx. detection | ~7–10 days for the ester; metabolite/IRMS detection up to ~3 months. |
Frequently asked questions
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References
- DEPO-Testosterone (testosterone cypionate) FDA label — ~8-day half-life (DailyMed)
- Pfizer Clinical Pharmacology — Depo-Testosterone
- WADA — detection of testosterone esters in blood
- Kicman AT. Pharmacology of anabolic steroids. Br J Pharmacol 2008;154(3):502–521
- PubChem — molecular weights (parent hormone & ester), per compound CID
- WADA — anti-doping scientific research & detection resources
Citations are provided for transparency and education. They do not imply the cited authors or bodies endorse this tool. Anabolic steroid use carries real health risks — always consult a qualified clinician.
How this is calculated
For injectables the calculator divides your weekly dose by the number of injections, then by the vial concentration, to get the mL per shot — and multiplies by 100 for U-100 syringe units. The active-hormone milligrams are the dose multiplied by the esterFactor (the parent hormone's molecular weight divided by the full ester's molecular weight). For orals it divides the daily dose by your doses-per-day and tablet strength to get tablets per dose. It is arithmetic only — nothing you enter is stored or sent anywhere, and the result is not medical advice or an endorsement of anabolic steroid use.