Hormone Unit Converter

What the Hormone Unit Converter does

This page hosts an estradiol dose converter for menopausal hormone therapy. You pick a starting delivery route and dose, pick a target route, and it returns an approximate equivalent dose in the target route. The four routes it knows are transdermal patch, oral tablet, gel pump, and vaginal ring at its systemic-comparable level. The output is educational framing for a conversation with a prescriber, not a dosing instruction and not a diagnosis.

The converter does not model your body. It anchors each route to one fixed reference dose and treats those four reference points as roughly equivalent to each other: patch 0.05, oral 1.0 mg/day, gel 1.0 mg/day, and vaginal ring 0.1 mg/day systemic. To convert, it divides your entered dose by the starting route's anchor to get a ratio, then multiplies that ratio by the target route's anchor and rounds to three decimals. So a patch at its 0.05 anchor maps to 1.0 mg/day oral, and doubling the patch to 0.1 doubles the oral figure to 2.0.

That means the math is strictly proportional. There is no algorithm learning from data, no pharmacokinetic simulation, and no clinical validation behind the number. It is a lookup table of four anchor doses plus one ratio calculation, which is why it is best read as a rough sense of scale rather than a target to dose to.

How to read your result

Read the result as a ballpark ratio, not a prescription. If your entered dose sits near a route's anchor, the equivalent will sit near the target's anchor; if you enter a dose well above or below the anchor, the tool scales it up or down in a straight line without checking whether that dose is used in practice. The number carries three decimals only because of rounding, not because it is precise to that level.

Use it to walk into a clinical conversation better oriented, for example to understand why a 0.1 patch and a 2.0 mg oral tablet occupy a similar tier in the tool's table. Any actual switch between formulations is titrated by a prescriber against blood levels and symptoms over weeks, because absorption differs by route and by person. If you are weighing routes or looking for a clinician, the site can help you compare providers, but this tool does not start, change, or recommend treatment.

What the result is based on

Everything on screen comes from one hardcoded table inside the component and a single proportional formula. The table holds four estradiol routes, each with a mid-dose anchor (patch 0.05, oral 1.0 mg/day, gel 1.0 mg/day, vaginal ring 0.1 mg/day systemic). The conversion is your dose divided by the source anchor, multiplied by the target anchor, rounded to three decimals. There is no external dataset, no user data, no live pricing, and no model.

What it cannot tell you

• It converts estradiol only. It has no handling for progesterone or progestins, testosterone, conjugated equine estrogens, or estradiol valerate injections, so it cannot help plan a combined HRT regimen.
• It assumes a straight-line dose response within each route. Real absorption is not perfectly proportional, so scaling a dose far from the tool's anchor drifts further from what actually happens in the body.
• The conversion uses only each route's single mid-dose anchor. The table also stores low and high reference values, but the calculation ignores them, so the tool will not flag a dose that is unusually high or low or outside a typical prescribing range.
• It ignores every individual factor a clinician weighs: oral first-pass liver metabolism, skin absorption variability for patch and gel, body weight, age, smoking, and interacting medications. Two people entering the same dose get the same output.
• The vaginal ring figure is the systemic-comparable value. Low-dose local vaginal estrogen used for genitourinary symptoms is a different product with minimal systemic absorption and is not what this models.
• Treating the four anchors as clinically equivalent is itself an approximation the tool makes for convenience, not an established equivalence you should dose to.