DoseRoutine

Sermorelin Dosage Calculator

Sermorelin is typically dosed 200–500 mcg nightly. Enter your vial size and bacteriostatic water volume to convert that into syringe units.

This is a unit converter. It converts an amount you already have into volume and syringe units. It does not tell you what to take, and it is educational only — not medical advice. Confirm every amount with your clinician and your product label.

Common setups

Vial size (mg)

Total compound in the vial.

BAC water added (mL)

Volume of bacteriostatic water you reconstitute with.

Target dose

Per-injection dose you want to draw.

Syringe type

U-100 = 100 units per mL (standard). U-40 = 40 units per mL.

Draw

15.0 units

on a U-100 insulin syringe (0.150 mL)

Concentration

2.00 mg/mL

Per dose

300 mcg

Doses / vial

~16

Sermorelin concentration reference (mg/mL)

What each vial size becomes at common bacteriostatic water volumes.

Vial	+ 1 mL	+ 2 mL	+ 3 mL	+ 5 mL
2 mg	2.00 mg/mL	1.00 mg/mL	0.67 mg/mL	0.40 mg/mL
5 mg	5.00 mg/mL	2.50 mg/mL	1.67 mg/mL	1.00 mg/mL
9 mg	9.00 mg/mL	4.50 mg/mL	3.00 mg/mL	1.80 mg/mL
15 mg	15.00 mg/mL	7.50 mg/mL	5.00 mg/mL	3.00 mg/mL

Sermorelin dosing at a glance

Phase	Dose	Frequency	Notes
Common low	100–200 mcg	Nightly	Conservative starting range.
Common standard	200–500 mcg	Nightly	Most compounding-pharmacy protocols sit here.
Timing	—	Bedtime, fasted	Matches the natural overnight GH pulse.
Review	—	At 3–6 months	IGF-1 is the usual monitoring marker.

Reference ranges reported in the literature and in common practice — not a prescription, and not personalised advice.

What trips people up

5 mg + 2.5 mL = 2 mg/mL, so 300 mcg = 15 units on a U-100 syringe.
Sermorelin has a very short half-life (around 10–20 minutes), which is why it is dosed nightly rather than weekly.
It is a GHRH analogue, so it depends on a working pituitary — it will not work like exogenous HGH.
Sermorelin is prescription-only in the US when compounded for human use.

How the maths works

Concentration (mg/mL) = vial mg ÷ bacteriostatic water mL.
Volume per dose (mL) = dose mg ÷ concentration.
Syringe units = volume × 100 on a U-100 syringe, or × 40 on a U-40 syringe.
Doses per vial = vial mg ÷ dose mg. Water volume never changes this number.

Sermorelin calculator FAQ

How many units is 300 mcg of sermorelin?

At 2 mg/mL (5 mg vial + 2.5 mL BAC water) it is 0.15 mL = 15 units on a U-100 syringe. At 1 mg/mL it would be 30 units.

How much BAC water for a 5 mg sermorelin vial?

2.5 mL is common and gives 2 mg/mL. Use 5 mL if your dose is 200 mcg or lower and you want a bigger, more readable draw.

When should sermorelin be injected?

At bedtime on an empty stomach. Its short half-life means it works by amplifying the natural nocturnal growth hormone pulse, and food-driven insulin blunts that pulse.

Sermorelin or CJC-1295?

Sermorelin is the shorter-acting original GHRH analogue; CJC-1295 is a modified version with a longer half-life. CJC-1295 with DAC lasts days, which changes the protocol from nightly to weekly.

Sermorelin reference page Check interactions

Educational tool only — not medical advice. Verify every dose with your prescriber and follow sterile technique. See our medical disclaimer.

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