Last updated: June 2026
Trenbolone Dosage Calculator
Quick answer: A 200 mg/week dose over 3.5 shots from a 100 mg/mL vial is 0.571 mL (57 units) per shot, ≈ 174 mg active hormone/week. mL = (weekly mg ÷ shots) ÷ mg/mL.
About this calculator
Trenbolone is a potent 19-nor injectable that does not aromatise. It comes as two esters with very different timing: acetate (≈87% active hormone, ~3-day depot) and enanthate (≈71% active hormone). For trenbolone enanthate, no FDA label, monograph, or peer-reviewed PK study establishes a half-life, so this calculator shows the exact dose-to-volume conversion but omits the enanthate timeline rather than printing an uncited number. esterFactor = 270.4 ÷ 312.4 = 0.87 (active Trenbolone 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: 200 mg · Concentration: 100 mg/mL · Injections/week: 3.5
57.1 mg/shot ÷ 100 = 0.571 mL (57 units) · active hormone ≈ 174 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 Trenbolone 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.
Trenbolone at a glance
| Property | Trenbolone |
|---|---|
| Form | Injectable (oil/suspension) |
| Active fraction | 0.87 (esterFactor) |
| Half-life | Acetate ≈ 3 days (textbook); Enanthate — not reliably established in the literature |
| Aromatises | No — trenbolone does not convert to estrogen (it is progestogenic instead). |
| Liver (17α-alkylated) | No (not 17α-alkylated). |
| Approx. detection | Metabolites detectable for weeks. |
Frequently asked questions
Choose a compound
Other calculators
References
- Ruiz P, Strain EC (eds). Lowinson and Ruiz’s Substance Abuse: A Comprehensive Textbook (2011) — tren acetate ~3-day depot
- Note: trenbolone enanthate half-life is UNVERIFIED — no FDA/EMA label or peer-reviewed PK study reports it.
- 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.