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TRT / HRT Dose Calculator
Calculate exact injection volumes for Testosterone Cypionate, Enanthate, and Propionate. Includes frequency splitter, compound reference, and protocol timeline.
Testosterone Dose Calculator
Weekly dose → injection volume in mL and syringe units
Testosterone Cypionate: Half-life ~8 days. Typically dosed 1–2× per week. Most common TRT ester in the US. Oil-based, IM injection.
TRT range: 100–200 mg/week
Per Injection
75
mg
Volume
0.30
mL per injection
Syringe Units
30
on U-100 syringe
Injection Frequency Splitter
See all split doses side-by-side for any frequency
Synced from calculator above
Synced from calculator above
| Frequency | Interval | Per-Injection Dose | Volume | Syringe Units |
|---|
HRT Compound Reference
Half-lives, typical dose ranges, and injection frequency
Typical TRT Dose
100–200 mg/wk
Cypionate Half-life
~8 days
Enanthate Half-life
~5 days
Propionate Half-life
~2–3 days
Recommended Frequency
1–2× week (Cyp/Enan)
Route
IM or SubQ
Cypionate and Enanthate have long half-lives — once or twice weekly injections maintain stable blood levels. Propionate has a short half-life requiring EOD or daily injections but produces less water retention for some. SubQ injections (abdominal fat) are an effective alternative to IM for TRT doses, with slower absorption and smoother peaks.
Typical Dose (NPP)
100–200 mg/wk
Typical Dose (Deca)
100–200 mg/wk
NPP Half-life
~2–4 days
Deca Half-life
~6–12 days
NPP Frequency
EOD or 3× week
Deca Frequency
1× week
Nandrolone Phenylpropionate (NPP) provides faster saturation and clearance than Deca (Decanoate). Used in therapeutic contexts for joint health and anemia. Typically stacked with testosterone at a 1:1 or 2:1 (T:N) ratio. Requires testosterone co-administration to offset libido/sexual function effects.
Typical Dose
200–400 mg/wk
Half-life (Enanthate)
~5–7 days
Half-life (Acetate)
~2–3 days
Injection Frequency
1–2× week
Common Concentration
100 mg/mL
Route
IM
Primobolan (Methenolone Enanthate) is a mild anabolic with low androgenic activity. Often used in TRT-adjacent protocols for lean tissue preservation. Effective dose is higher than many compounds — 200 mg/week is a low dose. Very low estrogenic activity means minimal aromatase inhibitor use required.
Typical TRT Support Dose
500–1500 IU/wk
Common Protocol
250–500 IU 2–3× week
Half-life
~24–36 hours
Reconstitution
Bacteriostatic water
Route
SubQ (belly fat)
Storage
Refrigerated after reconstitution
HCG (Human Chorionic Gonadotropin) is used alongside TRT to maintain testicular function, volume, and endogenous testosterone production. Short half-life requires injection 2–3× per week. Reconstituted vials must be refrigerated and used within 30–60 days. Commonly dosed at 250 IU 2× week or 500 IU 2× week depending on protocol goals.
Protocol Timeline
Visual injection calendar based on frequency
8-Week Schedule
Inject
Rest Day
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Medical Disclaimer: This calculator is for informational purposes only and does not constitute medical advice. Testosterone replacement therapy and other hormonal treatments must be prescribed and managed by a licensed healthcare provider. Dosing errors can have serious health consequences. Always verify calculations with your prescribing physician or pharmacist before injecting. The information on this page does not replace a clinical evaluation.