Sermorelin Dosage Calculator: BAC Water, mL and Units
Sermorelin dosage calculator math has three inputs: the mg in the vial, the mL of bac water you add, and the amount you want to draw. From those it gives the strength, the mL, and the calculated units on a U-100 insulin syringe. It also shows how many draws a vial holds and how many days that covers. It never picks the amount for you.
Sermorelin calculator: vial, water and amount
Your vial, your water, your amount
It opens with 5 mg in the vial, 2 mL of water, and one amount from the study list below. Those are the chart figures, not a suggestion. Type over any field.
Sizes seen on listings we read.
More water makes each unit weaker.
1 mg is 1000 mcg.
The two adult studies on our dosage chart used these amounts in older men:
Disclaimer: these are amounts from two short studies of 10 and 11 older men, not an approved dose. Sermorelin has no current US label. Pressing one only fills in the math; a licensed clinician makes any dose call.
What your numbers work out to
Strength of the mix
2500 mcg/mL
Calculated U-100 units
40 units
0.4 mL
Draws in one vial
5
Days one vial covers
2.5
At 2 draws a day
These are calculated units. Line spacing differs from one syringe to the next; on BD's 1 mL insulin syringe the small lines sit 2 units apart, so 33.3 or 75 units can land between two lines. The math also assumes the vial holds what its label says and all the water went in.
Disclaimer: this tool only does arithmetic on the numbers in the boxes. It is not a dose for anyone. Dose decisions belong with a licensed clinician.
The study buttons fill in amounts from our sermorelin dosage chart, which lists every regimen with who was studied and for how long. That table is not repeated here.
Sources: Corpas et al., J Clin Endocrinol Metab 1992, PMID 1379256: the twice-daily study in 10 older men.; Vittone et al., Metabolism 1997, PMID 9005976: the nightly study in 11 men aged 64 to 76.; Our sermorelin dosage chart, which holds every study regimen.; BD technical data sheet for disposable syringes: the 1 mL U-100 insulin syringe has a minor mark every 2 units.
How does the calculator turn mcg into units?
It runs three short steps. Each one is plain division or multiplication, so you can check it by hand.
- Strength: vial mg times 1000, divided by the mL of water. This gives mcg in each mL.
- Volume: the amount in mcg divided by that strength. This gives mL to draw.
- Units: mL times 100. On a U-100 scale, 100 units fill 1 mL. These are calculated units, and the gap between printed marks varies: a BD 1 mL U-100 syringe marks every 2 units.
Here is one worked case. It uses the higher amount from the twice-daily study in older men, in a 5 mg vial with 2 mL of water:
5 mg x 1000 / 2 mL = 2500 mcg per mL
1000 mcg / 2500 = 0.4 mL, which is 40 units
5000 mcg / 1000 mcg = 5 draws in the vial
Disclaimer: these amounts come from two small, short studies in older men. They are not an approved dose, and sermorelin has no current US label: Geref is listed by the FDA as discontinued. They are here so the math has real inputs. A licensed clinician makes any dose decision.
Notice what the water does. It changes how strong the liquid is, but never how much sermorelin the vial holds. Double the water and every draw takes twice as many units. A result like 33.3 units can fall between the printed marks. For the unit scale itself, see our insulin syringe units chart.
Sources: Corpas et al., J Clin Endocrinol Metab 1992, PMID 1379256: the twice-daily study in 10 older men.; BD technical data sheet for disposable syringes: the 1 mL U-100 insulin syringe has a minor mark every 2 units.
What vial sizes does sermorelin come in?
The old approved product, Geref, came in small vials of 0.5 mg and 1.0 mg, per a 2013 FDA notice. It left the US market, and the FDA found that was not for safety or effectiveness reasons. A 2025 FDA name review lists Geref as discontinued with no generic equivalents. What is sold online today is very different. We read the pages below on 23 October 2026 and wrote down only what each one printed.
| Type of page | Sizes printed | What else it said |
|---|---|---|
| Seller listing | 2 mg | Sold as one vial or a 10-vial kit; out of stock when read |
| Seller listing | 5 mg | Labelled for research use only |
| Lab reagent listing | 1, 5 and 10 mg | Catalog sizes; storage and shipping listed at +20 C |
| Lab reagent catalog | 2, 5, 10, 25, 50, 100, 250 and 500 mg | States it is not for human use |
| Compounding pharmacy blog | Liquid, 0.9 mg per mL | Comes already mixed, so no water is added |
So the vial buttons in the calculator are 1, 2, 5 and 10 mg. Of the four powder pages, 5 mg showed up on three, while 2 mg and 10 mg each showed up on two. That is why a 5 mg vial is the starting value. Our peptide reconstitution calculator handles sizes outside this list.
Sources: US Federal Register, 4 March 2013, document 2013-04827: the FDA notice on Geref vial sizes.; FDA proprietary name review for NDA 220152, dated 5 December 2025: its name table lists Geref as discontinued.; Our own read of 13 seller, catalog and pharmacy pages, 23 October 2026.
How far does one vial go at each study amount?
This is our own math. We took the three study amounts and divided each vial size by the amount used per draw and per day. Water does not change this table, because it only changes strength.
The twice-daily study (Corpas, 1992) and the nightly study (Vittone, 1997) used these amounts, worked out per vial:
| Vial | 500 mcg twice a day | 1000 mcg twice a day | 2000 mcg once a night |
|---|---|---|---|
| 1 mg | 2 draws, 1 day | 1 draw, 0.5 days | less than one draw |
| 2 mg | 4 draws, 2 days | 2 draws, 1 day | 1 draw, 1 day |
| 5 mg | 10 draws, 5 days | 5 draws, 2.5 days | 2.5 draws, 2.5 days |
| 10 mg | 20 draws, 10 days | 10 draws, 5 days | 5 draws, 5 days |
Disclaimer: these amounts come from two small, short studies in older men. They are not an approved dose, and sermorelin has no current US label: Geref is listed by the FDA as discontinued. They are here so the math has real inputs. A licensed clinician makes any dose decision.
The same study amounts, as calculated U-100 units when each vial gets 3 mL of water:
| Vial | Strength | 500 mcg | 1000 mcg | 2000 mcg |
|---|---|---|---|---|
| 2 mg | 666.7 mcg/mL | 75 units | 1.5 mL, over one syringe | 3 mL, over one syringe |
| 5 mg | 1666.7 mcg/mL | 30 units | 60 units | 1.2 mL, over one syringe |
| 10 mg | 3333.3 mcg/mL | 15 units | 30 units | 60 units |
Disclaimer: these amounts come from two small, short studies in older men. They are not an approved dose, and sermorelin has no current US label: Geref is listed by the FDA as discontinued. They are here so the math has real inputs. A licensed clinician makes any dose decision.
Two things stand out. A small vial runs out fast at the larger amounts, sometimes in a single day. And with a lot of water, the larger amounts no longer fit in one 1 mL syringe. The calculator warns you when that happens.
Sources: Corpas et al., J Clin Endocrinol Metab 1992, PMID 1379256: the twice-daily study in 10 older men.; Vittone et al., Metabolism 1997, PMID 9005976: the nightly study in 11 men aged 64 to 76.; Our own read of 13 seller, catalog and pharmacy pages, 23 October 2026.
What if the sermorelin is already mixed?
One compounding pharmacy page we read sells sermorelin as a ready liquid at 0.9 mg per mL. There is no water step, because the strength is fixed. To use the calculator, enter 0.9 mg as the vial and 1 mL as the water. That makes the strength 900 mcg per mL.
That pharmacy printed this example on its own chart, and our math matched it:
300 mcg at 900 mcg per mL = 33.3 units (the page printed 33)
Disclaimer: this figure is printed by one pharmacy for its own product. It is quoted to check the math, not as a dose for you.
The same idea applies to any ready liquid. Use the strength on its label, not a strength you worked out for a powder vial.
Sources: Our own read of 13 seller, catalog and pharmacy pages, 23 October 2026.; BD technical data sheet for disposable syringes: the 1 mL U-100 insulin syringe has a minor mark every 2 units.
What we checked today
On 23 October 2026 we tried 13 public sermorelin pages. Five showed a product with a size. Eight did not: three blocked us, two had no product page, two did not answer, and one loaded an empty shell. The vial table above comes only from the five that opened.
We also tested the math. We ran the same function this calculator uses against the 12 unit figures printed on our dosage chart. All 12 of 12 matched. As a control, we fed it a wrong expected answer, and the check failed as it should.
Want the same math for a related peptide? The tesamorelin calculator covers the other common GHRH copy.
Sources: Our own read of 13 seller, catalog and pharmacy pages, 23 October 2026.; Our sermorelin dosage chart, which holds every study regimen.
Common questions
How do I work out a sermorelin dose in mL?+
Start by turning the vial into mcg, since 1 mg is 1000 mcg. Split that over the mL of water, which gives the strength in mcg for each mL. Your amount over the strength is the mL to draw. Multiply the mL by 100 to get the calculated units on a U-100 scale. Your syringe may mark only every 2 units.
What volume of bac water suits a 5 mg sermorelin vial?+
Neither study we read (Corpas 1992, Vittone 1997) nor the 2013 FDA Geref notice sets a water volume. The water only sets the strength, and the vial holds 5 mg either way. Less water means fewer units per draw, and more water spreads a draw over more marks. Type a few volumes into the calculator and compare.
How do I reconstitute 10 mg of sermorelin?+
The strength is 10,000 mcg divided by the mL of water in the vial, whatever volume that is. The calculator does this step for any volume you enter. A 10 mg vial holds ten times the larger old Geref vial, so the label is worth a second look.
How long does one sermorelin vial last?+
It depends on the vial size, the amount per draw, and how many draws a day. Divide the vial in mcg by the mcg used per day. The table on this page works this out for the study schedules, and the calculator shows it for your own numbers.
Can this calculator tell me what dose to use?+
No. It converts numbers, and that is all. The study amounts are there so the math has a starting point, not as advice. In the US, Geref is listed as discontinued and there is no current label, so a dose is a decision for a licensed clinician who knows your case.
Sources: US Federal Register, 4 March 2013, document 2013-04827: the FDA notice on Geref vial sizes.; FDA proprietary name review for NDA 220152, dated 5 December 2025: its name table lists Geref as discontinued.; BD technical data sheet for disposable syringes: the 1 mL U-100 insulin syringe has a minor mark every 2 units.
More on sermorelin
Peptides Vietnam built this calculator for unit math on the numbers you enter. Treat it as a reference for the arithmetic only. It is not medical advice and does not choose an amount for any reader. In the US, Geref is discontinued and sermorelin has no current label.