Your weekly dose, in mL and units.
Enter the ester concentration and the weekly dose your provider prescribed, then how many injections you split it into. Lumara shows the volume and units per shot. For tracking & education only — it never recommends a dose.
Lumara is a tracking tool and does not provide medical advice, diagnosis, or treatment. This calculator computes the math from the numbers you enter; it never recommends a dose. Always follow your provider's guidance.
Saving keeps this vial, concentration, and schedule in your protocol so the math is done for you next time.
Do the math once. Let the app do it forever.
Next injection 25 units · 18 doses left · ~9 weeks. Save this vial and dose to Lumara and every future draw is pre-computed — with reminders that fire on time and expiry tracking, all on your device.
Free to download for iPhone & Android. A 30-day trial runs in the app — no card — then it stays free for one medication. Tracking & education only, never a dose recommendation.
How to convert a weekly testosterone dose into units
Testosterone esters (cypionate, enanthate, propionate) are supplied at a concentration in mg/mL. Converting your prescribed weekly dose to a per-injection volume just needs that concentration and how many injections you split the week into.
- Enter the ester concentration from your vial label — commonly 200 mg/mL for cypionate or enanthate.
- Enter your prescribed weekly dose in mg, exactly as your provider set it.
- Set how many injections you split the week into — the tool divides the weekly total evenly.
- Read the mL and units to draw per injection on a U-100 syringe, then log each shot.
Worked example: 100 mg/week of 200 mg/mL, split into two
A 100 mg weekly dose of a 200 mg/mL ester, taken as two injections a week:
- Per injection (mg) — 100 mg ÷ 2 = 50 mg.
- Volume — 50 mg ÷ 200 mg/mL = 0.25 mL.
- Units to draw — 0.25 mL × 100 units/mL = 25 units on a U-100 syringe.
- Weekly volume — 2 × 0.25 mL = 0.5 mL total.
Splitting a dose across more injections lowers the volume per shot but does not change the weekly total. Enter your own numbers above.
Frequently asked questions
Divide your per-injection dose (mg) by the ester concentration (mg/mL) to get millilitres, then multiply by 100 to get U-100 units. For example, 50 mg of a 200 mg/mL ester is 0.25 mL, which is 25 units. Enter your own numbers above and the calculator shows every step.
It varies by product — read the mg/mL from your vial label. 200 mg/mL is common, but 100 mg/mL and other strengths exist. The concentration is what turns your prescribed mg into a volume, so use the exact figure on your label.
No. Splitting the same weekly total across more injections only lowers the volume per shot; the weekly amount is unchanged. Whether and how to split is a decision for you and your provider — the tool only does the arithmetic.
No. It is an educational estimation tool. It converts the numbers you enter and shows its work; it never prescribes, diagnoses, or recommends a dose or schedule. Always follow your licensed provider’s instructions.