Semaglutide Reconstitution Calculator

Semaglutide vials vary by supplier and label amount. Enter the exact amount printed on your vial — not an example — along with the bacteriostatic water you added and the dose you already have, to get a concentration and syringe draw. This free tool doubles as a semaglutide dosage calculator — reconstitution and dosage are just two steps of the same math.

Semaglutide vials are commonly sold in 2 mg, 5 mg, and 10 mg sizes. Enter your vial's actual labeled amount, not one of these examples.

Peptide amount in vial

The total peptide mass printed on your vial label.

mgmcg

Bacteriostatic water added

How much water you added to reconstitute the vial.

Desired dose

The dose you already have — this tool converts it, it doesn't choose it for you.

mgmcg

Syringe size (U-100)

0.3 mL0.5 mL1.0 mL

Results

Syringe draw

—u

Enter your dose above

Concentration (mg/mL): —
Concentration (mcg/mL): —
Injection volume: Enter your dose above
mcg per unit: —
Doses per vial: —

Formula: dose ÷ concentration × 100 — see methodologyFormulas verified: July 23, 2026No data leaves your browser

Arithmetic only — this tool does not recommend a dose.

How this calculator works

Concentration = peptide amount ÷ bacteriostatic water volume.
Injection volume = your dose ÷ that concentration.
Syringe units = injection volume × 100, since a U-100 syringe holds 100 units per mL.

Semaglutide peptide dosing chart

This chart converts between units only — it is not a recommended dose for any compound. Your prescribed or protocol dose comes from your own paperwork, not this chart.

mg to mcg
mg	mcg
0.1 mg	100 mcg
0.25 mg	250 mcg
0.5 mg	500 mcg
1 mg	1,000 mcg
2 mg	2,000 mcg
5 mg	5,000 mcg
10 mg	10,000 mcg

mL to U-100 syringe units
mL	Units
0.05 mL	5 units
0.1 mL	10 units
0.2 mL	20 units
0.25 mL	25 units
0.5 mL	50 units
0.75 mL	75 units
1.0 mL	100 units

How much bacteriostatic water for semaglutide?

Ask ten people how much water to add to semaglutide and you'd get ten different concentrations — the volume itself is what sets it, not a fixed step. Pour more in and each semaglutide dose draws up larger; pour less and it draws up smaller. Enter your semaglutide vial's mg and water volume above to calculate yours.

Semaglutide units calculator

On a U-100 syringe, 100 units equal 1 mL — that's the scale this calculator converts your semaglutide draw into. After you enter your semaglutide vial's numbers and a dose, the resulting injection volume is translated into units automatically, so your semaglutide dose lines up with the syringe's printed markings rather than a milliliter fraction.

Frequently asked questions

Is this a free semaglutide peptide calculator?

Yes. It runs entirely in your browser, with no account, no login, and no data sent anywhere — enter your vial amount, water volume, and dose to get a concentration and syringe draw.

Is this a semaglutide dosage calculator?

Yes. Reconstitution and dosage are two steps of the same calculation: this tool first works out your semaglutide vial's concentration from its amount and water volume, then — once you enter a dose — converts that dose into an injection volume and syringe unit count.

What size are semaglutide vials?

Semaglutide vials are commonly sold in 2 mg, 5 mg, and 10 mg sizes, but always use the exact amount printed on your own vial's label rather than one of these examples — label amounts vary by supplier.

How do I reconstitute a 5 mg semaglutide vial?

Enter 5 mg as the peptide amount along with the water volume you added — for example, 5 mg reconstituted with 2 mL gives a concentration of 5 ÷ 2 = 2.5 mg/mL. Then enter your dose and the calculator converts it into an injection volume and syringe unit count.

Is there a semaglutide peptide dosing chart?

See the mg/mcg and mL/units conversion chart below. It converts between units only — it does not list a recommended semaglutide dose, which should come from your own prescription or protocol.

Can I use this online for free, without downloading anything?

Yes. It's a web page, not a download — open it in any browser, enter your numbers, and it calculates instantly. Nothing to install, no account, no data sent anywhere.

Is this a semaglutide reconstitution calculator for weight loss?

This calculator handles the arithmetic for semaglutide, a compound commonly used in weight-management protocols — concentration from your vial's amount and water volume, then a dose into a syringe draw. It doesn't recommend a dose, a protocol, or a use case; it converts whatever numbers you already have.

Does semaglutide dosage use mg or mcg?

Both units appear on different suppliers' labels and protocols. 1 mg = 1,000 mcg. The calculator above has an mg/mcg toggle for both the vial amount and the dose field — match whichever unit is printed on your paperwork.

Is this calculator affiliated with a specific semaglutide brand or supplier?

No. This calculator is not affiliated with any peptide manufacturer or supplier — it performs the same arithmetic conversion regardless of where your vial came from.

Is this semaglutide calculator medical advice?

No. It applies one formula — mass divided by volume, then dose divided by concentration — to the numbers you enter. It does not suggest a dose, a vial size, or a solution volume. See the medical disclaimer for full detail.

Related calculators

Educational tool only, not medical advice — verify with a licensed clinician. See the full medical disclaimer.