Independent & reader-supported — every article medically reviewed
MG / WK

TRT / Testosterone

Sponsored by Yes Clinic Learn more

This calculator is free to use and its results are not affected by who supports it. Learn more about our editorial standards

See weekly totals, ester conversions, and how long a vial lasts.

Weekly totals, split, and vial life

TRT and Testosterone Dosage Calculator

A rough weekly figure, a sensible way to split it, and an honest answer on how long a vial lasts. The questions below are the ones the formula uses; they are not a diagnosis, and the number that comes out is a calculation, not a plan.

If you have a blood test, enter the figure and it changes the arithmetic. If you don't, that is the thing to go and get, and it matters considerably more than anything this page can tell you.

Tool — TRT dosageLive
What are you looking for?
TESTOSTERONE
— mg
— /wk
This sets how many injections the week is split into, not the weekly total.
— mg/mL
— mL
How long will a vial last? Enter the concentration and the bottle size to find out, and how many bottles a full run needs.
Noted alongside your result. If you don't have one, that's the figure worth getting before anything else.

Which days

Bottle life

Drag the marker to try a different run length — it writes straight back into the field above.

Read this firstThis is a scheduling and arithmetic tool for education. It is not medical advice, it is not a prescription, and it does not know anything about you. Dose changes belong to you and the clinician who prescribed the compound — not to a web page. Talk to a qualified professional before acting on any figure here.

Something wrong, or something missing?

These tools get rebuilt when readers tell us they've hit an edge case — an unusual vial strength, a unit nobody uses any more, a currency we forgot. If a figure looks wrong to you, it might be. Tell us what you entered and what you expected, and we'll check the formula rather than defend it.

← All calculators and tools