Last updated: June 2026
Anavar Dosage Calculator
Quick answer: A 40 mg daily dose split into 2 from 10 mg tablets is 2 tablet(s) per dose. Tablets = (daily mg ÷ doses) ÷ mg per tablet.
About this calculator
Anavar (oxandrolone) is an oral, non-esterified anabolic steroid, so 100% of each milligram is active compound — there is no ester to subtract. This calculator converts a daily dose into tablets per dose from your tablet strength, and shows the half-life timing that governs how the dose is usually split through the day. No ester — esterFactor = 1.00 (every milligram is active compound).
How to use this calculator
Enter your daily dose, your tablet strength (mg per tablet), and how many times a day you split the dose. The result updates instantly with tablets per dose and the per-dose milligrams.
Worked example
Daily dose: 40 mg · Tablet strength: 10 mg · Doses/day: 2
20 mg per dose → 20 ÷ 10 = 2 tablet(s) per dose
How to interpret your result
The result is the number of tablets to take per dose. Fractions mean a tablet would need splitting — round to what your tablet strength allows. The half-life figure is a pharmacokinetic timing reference only.
Anavar at a glance
| Property | Anavar |
|---|---|
| Form | Oral |
| Active fraction | 1.00 (no ester) |
| Half-life | ≈ 9.4–10.4 h (≈ 13 h in older adults) — Karim 1973, a peer-reviewed radiolabelled PK study |
| Aromatises | No — already 5α-reduced, not an aromatase substrate. |
| Liver (17α-alkylated) | Yes — 17α-methylated, so it passes through and stresses the liver. |
| Approx. detection | ~12–18 days (longer via 18-nor markers). |
Frequently asked questions
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References
- Karim A et al. Oxandrolone disposition and metabolism in man. Clin Pharmacol Ther 1973;14(5):862–869 (PMID 4729902)
- WADA — oxandrolone long-term metabolite research
- 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.