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 (57.1 units) per shot, ≈ 174 mg active hormone/week. mL = (weekly mg ÷ shots) ÷ mg/mL.
Injectable ester — about 87% of each mg is Trenbolone; the calculator converts dose → mL, units and active mg. Aromatizes: No. Liver-strain (17α-alkylated): No. Half-life: Acetate ≈ 3 days (textbook); Enanthate.
About this calculator
Trenbolone is a potent 19-nor injectable that does not aromatize. 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.
Trenbolone is a 19-nortestosterone derivative far more potent per milligram than testosterone. It is sold mainly as the fast acetate and the slower enanthate esters, and the choice of ester changes both the active fraction and how often it is injected.
How the injection-volume maths works
Acetate is about 87% trenbolone by weight (270.4 ÷ 312.4) and enanthate about 71% (270.4 ÷ 382.5), so the same labelled dose delivers different active milligrams. The calculator applies the correct factor for whichever ester you select.
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 examples
Weekly dose: 200 mg · Concentration: 100 mg/mL · Injections/week: 3.5
57.14 mg/shot ÷ 100 = 0.571 mL (57.1 units) · active ≈ 174 mg/week
Weekly dose: 300 mg · Concentration: 200 mg/mL · Injections/week: 2
150 mg/shot ÷ 200 = 0.75 mL (75 units) · active ≈ 261 mg/week
Trenbolone dose chart
Common doses at 100 mg/mL, 2 injections/week (each row is the calculator’s arithmetic worked out):
| Weekly dose | mL/shot | Units | Active/week |
|---|---|---|---|
| 100 mg | 0.5 mL | 50 | 87 mg |
| 150 mg | 0.75 mL | 75 | 131 mg |
| 200 mg | 1 mL | 100 | 174 mg |
| 250 mg | 1.25 mL | 125 | 218 mg |
| 300 mg | 1.5 mL | 150 | 261 mg |
Half-life & clearance
Illustrative single-dose elimination by half-life (t½ ≈ 3 days). Each marker is one half-life; after ~5 the dose is essentially cleared. For an oil depot the real rise-and-fall is slower (absorption-limited release), so treat this as a timing reference, not a blood-level prediction.
Trenbolone acetate has a short (~3-day) depot, so it is injected frequently; enanthate releases more slowly, but because no peer-reviewed study establishes its half-life we show the conversion without a timeline for that ester — a deliberate medical-honesty choice.
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 or switching concentrations. The half-life figure is a pharmacokinetic timing reference only.
Aromatization, liver & monitoring
Trenbolone does not aromatize — it is progestogenic rather than estrogenic, so classic anti-estrogens do not address its side effects. It is not 17α-alkylated, so liver strain is not the headline concern; cardiovascular and neurological effects are.
Common mistakes
Mixing up the esters is the big one: a 100 mg/mL acetate vial and a 200 mg/mL enanthate vial give very different draw volumes for the same labelled dose. Set the ester first, then read the mL.
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 |
| Aromatizes | 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
Related guides
Other compounds
Other calculators
References
- PubChem — trenbolone (molecular weight), CID 25015
- PubChem — trenbolone acetate (molecular weight), CID 66359
- PubChem — trenbolone enanthate (molecular weight), CID 20112041
- Kicman AT. Pharmacology of anabolic steroids. Br J Pharmacol 2008;154(3):502–521
Every citation URL was verified to return HTTP 200. Citations are provided for transparency and education and 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 (1 mL = 100 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, both from PubChem). For orals it divides the daily dose by your doses-per-day and tablet strength to get tablets per dose. Half-life timing uses ke = ln2 ÷ t½ and the ~5-half-life rule of thumb for steady state and clearance. 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.