Last updated: June 2026 · Reviewed June 2026 · Built by the InjectBuddy team
How does the TRT weekly cost calculator work? vial price, strength, and weekly dose
The TRT weekly cost calculator works by dividing your vial price by the total milligrams of testosterone it holds to get a cost per mg, then multiplying that by your weekly dose in mg. A $60 vial holding 2,000 mg works out to $0.03 per mg, so a 140 mg weekly dose costs about $4.20 of testosterone each week. This guide explains the three inputs that drive your weekly cost, works through a cost chart and seven examples you can copy with your own numbers, and answers the questions people ask most.
- Cost per week = (vial price ÷ total mg in vial) × weekly dose in mg.
- A 10 mL vial of 200 mg/mL testosterone holds 2,000 mg total — that single number drives the whole calculation.
- Higher mg/mL means a smaller draw and more weeks per vial, but the same cost per mg keeps your weekly cost unchanged.
- Run your own numbers with the Testosterone (TRT) dose calculator to confirm your draw volume per injection.
The three numbers that set your weekly cost
Three inputs decide what a week of injectable testosterone costs you: the vial price, the vial strength in mg/mL, and your weekly dose in mg. The strength and the vial volume together tell you the total milligrams in the bottle. A common pharmacy presentation is testosterone cypionate 200 mg/mL supplied as a 10 mL multiple-dose vial, which is 2,000 mg of testosterone per vial (DailyMed, Hikma label). Multiply mg/mL by the number of milliliters and you have the total mg — the denominator for every cost calculation below.
Notice what is not on that list: injection frequency. Splitting 140 mg/week into two 70 mg shots or seven 20 mg shots changes your draw volume per injection, but it does not change how many milligrams leave the vial each week, so the weekly testosterone cost is identical. Frequency matters for blood-level smoothness, not for cost. If you want to see the per-shot volume, the Testosterone (TRT) dose calculator handles that split for you.
How this is calculated
The method is two divisions and a multiplication, and it works for any strength or pack size:
- Total mg in the vial = strength (mg/mL) × vial volume (mL). Example: 200 mg/mL × 10 mL = 2,000 mg.
- Cost per mg = vial price ÷ total mg. Example: $60 ÷ 2,000 mg = $0.03 per mg.
- Cost per week = cost per mg × weekly dose (mg). Example: $0.03 × 140 mg = $4.20 per week.
A useful by-product of the same numbers is how many weeks a vial lasts: total mg ÷ weekly dose. With 2,000 mg and 140 mg/week that is about 14.3 weeks, which is why a single inexpensive vial often covers a whole quarter. If you want to plan a vial out to its discard date, the how-long-will-my-vial-last guide walks through the same division with shelf-life caveats.
Cost-per-week chart by price, strength, and dose
The chart below assumes a 10 mL vial at each strength and shows the testosterone-only cost per week. It ignores syringes, needles, consultation, and pharmacy fees — add those separately, since they are usually fixed per period rather than per mg.
| Vial (10 mL) | Total mg | Vial price | Cost / mg | 100 mg/wk | 140 mg/wk | 200 mg/wk |
|---|---|---|---|---|---|---|
| 100 mg/mL | 1,000 mg | $50 | $0.050 | $5.00 | $7.00 | $10.00 |
| 200 mg/mL | 2,000 mg | $60 | $0.030 | $3.00 | $4.20 | $6.00 |
| 200 mg/mL | 2,000 mg | $100 | $0.050 | $5.00 | $7.00 | $10.00 |
| 250 mg/mL | 2,500 mg | $90 | $0.036 | $3.60 | $5.04 | $7.20 |
Read the chart by cost per mg, not by price alone: the $60 vial at 200 mg/mL and the $50 vial at 100 mg/mL look very different but the 100 mg/mL one is more expensive per mg, so it costs more every week. For a draw-volume comparison between the two common strengths, see the 200 vs 250 mg/mL draw chart.
Worked examples
Each example uses the same three-step method. Prices are illustrative.
$60 vial, 200 mg/mL × 10 mL = 2,000 mg. Cost per mg = $60 ÷ 2,000 = $0.03. At 140 mg/week: $0.03 × 140 = $4.20 per week. Vial lasts 2,000 ÷ 140 ≈ 14.3 weeks.
Same $60 / 2,000 mg vial at 100 mg/week: $0.03 × 100 = $3.00 per week. The lower dose stretches the vial to 2,000 ÷ 100 = 20 weeks.
$100 vial, still 2,000 mg, so cost per mg = $100 ÷ 2,000 = $0.05. At 140 mg/week: $0.05 × 140 = $7.00 per week — same dose, $2.80 more per week than the $60 vial.
$50 vial, 100 mg/mL × 10 mL = 1,000 mg. Cost per mg = $50 ÷ 1,000 = $0.05. At 100 mg/week: $0.05 × 100 = $5.00 per week. The vial lasts only 1,000 ÷ 100 = 10 weeks.
$90 vial, 250 mg/mL × 10 mL = 2,500 mg. Cost per mg = $90 ÷ 2,500 = $0.036. At 200 mg/week: $0.036 × 200 = $7.20 per week; the vial lasts 2,500 ÷ 200 = 12.5 weeks.
Take the $4.20/week testosterone cost and add a $15 quarterly syringe-and-needle pack over 13 weeks: $15 ÷ 13 ≈ $1.15/week. All-in ≈ $5.35 per week. Fixed costs spread thinner the longer a vial lasts.
On a twice-weekly split at 140 mg/week, each shot is 70 mg. Cost per mg $0.03 × 70 = $2.10 per injection, two per week — the same $4.20 weekly total, just viewed per shot.
Why adherence is the real cost lever
The cheapest protocol is the one you actually finish. Persistence on injectable testosterone is imperfect — one Ontario cohort found a median time to discontinuation of about 283 days for injectables, and longer for some other formulations (Martins et al., 2017). Topical regimens fare worse: one claims analysis found only 34.7% of men still on therapy at six months and 15.4% at twelve (Schoenfeld et al., 2013). Wasted, half-used vials quietly raise your true cost per effective week, so a format you will stick with often beats a marginally cheaper one you abandon. Treatment choice and monitoring should follow your clinician's guidance and morning testosterone testing, not a spreadsheet (Bhasin et al., 2018).
Handling matters too: a multiple-dose vial only delivers its full mg count if it stays sterile and usable to the end. Follow safe injection practice — a new sterile needle and syringe each time, clean technique, and the label's storage and discard instructions (CDC). A vial discarded early because of contamination costs the same as one fully used but buys fewer weeks.
So, how does the TRT weekly cost calculator work?
It works by turning your vial price into a cost per mg, then scaling that by your weekly dose: cost per week = (vial price divided by total mg in the vial) multiplied by your weekly dose in mg. Total mg in the vial = strength in mg/mL multiplied by vial volume in mL. For a $60 vial of 200 mg/mL in a 10 mL bottle, that is $60 divided by 2,000 mg = $0.03 per mg; at 140 mg per week the weekly testosterone cost is $4.20. To confirm your draw volume per injection, run your numbers through the Testosterone (TRT) dose calculator.
FAQs
How does the TRT weekly cost calculator work?
Does injecting more often cost more?
Should I compare vials by price or by cost per mg?
Are these prices real?
How many weeks does a testosterone vial last at 140 mg per week?
Sources
- DailyMed (Hikma Pharmaceuticals USA). Testosterone Cypionate Injection, USP, 200 mg/mL label. DailyMed label.
- Martins D, et al. The appropriateness and persistence of testosterone replacement therapy in Ontario. Pharmacoepidemiol Drug Saf. 2017. PubMed PMID: 27528454.
- Schoenfeld MJ, et al. Medication adherence and treatment patterns for hypogonadal patients treated with topical testosterone therapy. J Sex Med. 2013. PubMed PMID: 23464534.
- Bhasin S, et al. Testosterone Therapy in Men With Hypogonadism: An Endocrine Society Clinical Practice Guideline. J Clin Endocrinol Metab. 2018. PubMed PMID: 29562364.
- CDC. Safe Injection Practices to Prevent Transmission of Infections to Patients. CDC injection safety guidance.
This guide is for general educational purposes only and does not constitute medical advice, and the prices shown are illustrative examples, not quotes. Always follow your prescriber's specific instructions.