gHRP-2 calculator
5 mg in 2 mL = 2.5 mg/mL, so 100 mcg is 0.04 mL = 4 units on a U-100 syringe.
Sizes on sale: 5mg, 10mg. Choose a vial, the water and the amount per draw; prices are the lowest current US offers.
price, vial size and certificate correction
Lowest current US offer for this size.
Most 2–15 mg vials hold 3 mL.
From the lot certificate; it replaces the label amount.
draw 4 units
0.04 mL on a 0.3 mL U-100 syringe
- concentration
- 2.5 mg/mL
- per unit
- 25 mcg per unit
- full draws per vial
- 50
- cost per draw
- $0.40 · $4.00/mg
the working
- 5 mg ÷ 2 mL = 2.5 mg/mL
- 100 mcg ÷ 2.5 mg/mL = 0.04 mL
- 0.04 mL × 100 = 4 units on a 0.3 mL U-100 syringe
- 5 mg ÷ 100 mcg = 50 → 50 full draws
- $20.00 × 100 mcg ÷ 5 mg = $0.40 per draw
If this is a prescription, the dose and volume on your pharmacy label take priority. Ask your pharmacist about any mismatch.
cheapest way to buy it · cost per draw of 100 mcg
| vendor | size | price | $/mg | per draw | checked | calculate with this vial, or view it |
|---|---|---|---|---|---|---|
| Cenexa Labs | 10mg | $34.99 | $3.50 | $0.35 | 2026-11-06 | view, GHRP-2 10mg at Cenexa Labs, opens in a new tab |
| Amino USA | 5mg | $20.00 | $4.00 | $0.40 | 2026-11-06 | view, GHRP-2 5mg at Amino USA, opens in a new tab |
| Cenexa Labs | 5mg | $24.99 | $5.00 | $0.50 | 2026-11-06 | view, GHRP-2 5mg at Cenexa Labs, opens in a new tab |
In-stock US offers checked in the last 7 days, before shipping. The featured partner is a paid placement and is labelled; order here is by price per mg.
approved outside the US · cited sources
doses of GHRP-2 used in research
Approved in Japan as the single-dose diagnostic GHRP Kaken 100 (pralmorelin hydrochloride): 100 mcg intravenously from age 18 and 2 mcg/kg (maximum 100 mcg) from age 4 to under 18; no US FDA application exists. These are the amounts specific labels and studies used, linked to each source. They are references, not recommendations; a prescription label takes priority.
| source | who | amount and schedule | route |
|---|---|---|---|
| Japan label (GHRP Kaken 100): 100 mcg IV, adults label outside the US · 2025 · 200022_7223407D2023_1_01 | patients aged 18 years and older being tested for growth hormone secretion deficiency | 100 mcg single dose Pralmorelin hydrochloride 100 mcg vial dissolved in 10 mL physiological saline immediately before use and injected slowly intravenously in the fasting state. Indicated only for diagnosis of growth hormone secretion deficiency; contraindicated in pregnancy. Kaken Pharmaceutical; package insert revised July 2025 (3rd edition). | intravenous |
| Japan label: 2 mcg/kg IV, ages 4 to under 18 label outside the US · 2025 · 200022_7223407D2023_1_01 | patients aged 4 to under 18 years being tested for growth hormone secretion deficiency | 2 mcg/kg single dose 2 mcg per kg body weight, or 100 mcg when body weight exceeds 50 kg, injected slowly intravenously in the fasting state after dissolving in 10 mL saline. | intravenous |
| Diagnostic study (J Endocr Soc 2022): 100 mcg IV bolus human pilot study · 2022 · 35795807 | 36 patients with hypothalamic-pituitary disorder | 100 mcg single dose After an overnight fast and 30 minutes supine rest, a 100 mcg IV bolus was given with sampling before and at 15, 30 and 60 minutes. Peak GH 9 ng/mL or less was classed as severe GHD, above 9 to 16 ng/mL as moderate GHD and above 16 ng/mL as non-GHD. | intravenous |
Sources checked Nov 4, 2026.
GHRP-2 5mg in 2 mL
amount to syringe units
| amount | mL | U-100 units | U-40 units |
|---|---|---|---|
| 100 mcg | 0.04 | 4 | 1.6 |
| 250 mcg | 0.1 | 10 | 4 |
| 500 mcg | 0.2 | 20 | 8 |
| 1 mg | 0.4 | 40 | 16 |
| 2 mg | 0.8 | 80 | 32 |
| 2.5 mg | 1 | 100 | 40 |
| 5 mg | 2 | 200 | 80 |
One unit on a U-100 syringe is 0.01 mL; on a U-40 it is 0.025 mL.
every GHRP-2 vial size on sale
reconstitution chart
| vial | 1 mL water | 2 mL water | 3 mL water | 5 mL water |
|---|---|---|---|---|
| 5 mg | 5 mg/mL 10 units = 0.5 mg | 2.5 mg/mL 10 units = 0.25 mg | 1.667 mg/mL 10 units = 0.167 mg | 1 mg/mL 10 units = 0.1 mg |
| 10 mg | 10 mg/mL 10 units = 1 mg | 5 mg/mL 10 units = 0.5 mg | 3.333 mg/mL 10 units = 0.333 mg | 2 mg/mL 10 units = 0.2 mg |
10 units on a U-100 syringe is 0.1 mL. Every cell is exact arithmetic: amount ÷ water.
what the numbers mean · where they come from
terms and sources
- Label amount or measured amount. The calculator starts from the amount printed on the vial. A lot certificate’s measured content (net peptide content, in mg) can replace it for the vial that was tested. HPLC purity is a share of peak area, not a mass, so a purity-only correction is shown as an estimate. See HPLC, certificate of analysis and how to read a peptide COA.
- Concentration. Amount in the vial ÷ water added. Terms: reconstitution, bacteriostatic water, lyophilized.
- Syringe units. A volume: 0.01 mL per unit on a U-100 syringe, 0.025 mL on U-40. Units say nothing about the compound until the concentration is known.
- Cost per draw. Vial price × amount per draw ÷ vial amount, from the price per mg of a current offer. Offers come from the GHRP-2 price comparison; certificates from the COA library.
Arithmetic only, on the numbers entered. Amounts from labels or trials are cited references, not recommendations; PeptideTech does not give personal use instructions and does not test products.
short answers
GHRP-2 calculator questions
How much bacteriostatic water do I add to GHRP-2 5mg?
What changes the calculated concentration?
How many units is 100 mcg of GHRP-2?
What doses of GHRP-2 were used in research?
What does GHRP-2 cost per mg?
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