Last updated: June 2026
Equipoise Dosage Calculator
Quick answer: A 300 mg/week dose over 2 shots from a 250 mg/mL vial is 0.6 mL (60 units) per shot, ≈ 189 mg active hormone/week. mL = (weekly mg ÷ shots) ÷ mg/mL.
About this calculator
Equipoise (boldenone undecylenate) is a long-ester injectable, originally veterinary. Only about 63% of each milligram is active boldenone — the long undecylenate chain accounts for the rest. This calculator converts a weekly dose into draw volume and syringe units, and shows the long depot half-life. esterFactor = 286.4 ÷ 452.7 = 0.63 (active Equipoise 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: 300 mg · Concentration: 250 mg/mL · Injections/week: 2
150 mg/shot ÷ 250 = 0.6 mL (60 units) · active hormone ≈ 189 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 Equipoise 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.
Equipoise at a glance
| Property | Equipoise |
|---|---|
| Form | Injectable (oil/suspension) |
| Active fraction | 0.63 (esterFactor) |
| Half-life | ≈ 14 days human depot (compiled); 123 h measured in an equine PK study (species caveat) |
| Aromatises | Yes (partial) — an aromatase substrate, roughly half the rate of testosterone (estimate; atypical estrogen profile). |
| Liver (17α-alkylated) | No (not 17α-alkylated). |
| Approx. detection | Long — detectable for months due to the slow undecylenate depot. |
Frequently asked questions
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References
- Soma LR et al. Boldenone PK in horses (123 h). J Vet Pharmacol Ther 2007 (PMID 17348894)
- 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.