HomePeptide calculator
Peptide dosage calculator
Type in the milligrams printed on your vial, the water you added and the dose you are checking. The calculator gives the concentration, the volume in mL and the mark on a U-100 insulin syringe, and shows each step of the math.
4Read the draw in mL and syringe units.
Draw to 5 units
- Concentration
- 5 mg/mL
- Volume
- 0.05 mL
- Doses per vial
- 40
100 unit syringe, 1 mL. Each small line is 2 units.
- Concentration10 mg / 2 mL = 5 mg/mL
- Volume0.25 mg / 5 mg/mL = 0.05 mL
- Syringe units0.05 mL x 100 = 5 units
- Doses per vial10 mg / 0.25 mg = 40
More ways to work it out
Three smaller calculators for the cases the main one does not cover.
Pick the mark, get the water
Choose the syringe mark you want your dose to land on. This works out how much water to add.
Vials labelled in IU
For vials such as HCG, HMG and HGH, where the label and the dose are both in IU.
What one draw of a blend carries
A blend is drawn as one liquid. This shows how many milligrams of each part are in the draw.
How the calculator works
There are three sums, and the calculator shows all of them under the answer.
- Concentration. Milligrams in the vial divided by millilitres of water added. A 10 mg vial with 2 mL of water is 5 mg/mL.
- Volume. The dose in milligrams divided by the concentration. 0.25 mg divided by 5 mg/mL is 0.05 mL.
- Syringe units. The volume in mL times 100, because a U-100 syringe has 100 unit marks in 1 mL. 0.05 mL is 5 units.
Doses per vial is the milligrams in the vial divided by the dose, rounded down to a whole number.
A worked example
A 5 mg vial, 2 mL of bacteriostatic water, and a dose of 250 mcg.
- 5 mg divided by 2 mL is 2.5 mg/mL.
- 250 mcg is 0.25 mg. 0.25 mg divided by 2.5 mg/mL is 0.1 mL.
- 0.1 mL times 100 is 10 units.
- 5 mg divided by 0.25 mg is 20 doses in the vial.
If the same vial had 1 mL of water instead, it would be 5 mg/mL and the same dose would be 5 units. The dose has not changed. It is just in half the liquid.
What it does not do
The calculator does arithmetic. It does not know what a sensible dose is, and it will work out any number you type.
- The main calculator takes vials labelled in milligrams. For a vial labelled in IU, use the IU calculator on this page. It does not convert IU to milligrams, because that figure is different for every substance.
- It assumes a U-100 insulin syringe, where 100 units is 1 mL. Other syringes have different marks.
- It warns when a draw is under 5 units, because that is hard to read on any syringe, and when it is more than the syringe holds.
- Nothing you type is sent anywhere. The sums run in your browser.
Calculator questions
How do I convert mg to units on an insulin syringe?
Divide the dose in mg by the concentration in mg/mL to get mL, then multiply by 100. On a U-100 syringe, 1 mL is 100 units, so 0.1 mL is 10 units.
How many units is 1 mg?
It depends on how much water is in the vial. In a 10 mg vial mixed with 2 mL, 1 mg is 0.2 mL, which is 20 units. In a 5 mg vial mixed with 2 mL, 1 mg is 0.4 mL, which is 40 units.
Does adding more water make the dose weaker?
No. The milligrams in the vial stay the same. More water means each dose is a bigger volume, so the mark on the syringe is higher.
Are syringe units the same as IU?
No. Units on an insulin syringe are a measure of volume: 100 units is 1 mL. IU measures how active a substance is, and the amount in 1 IU is different for each substance.
How much bacteriostatic water should I add?
Any amount works if the math is redone for it. 2 mL is common because it usually puts the dose on an easy mark. Try 1, 2 and 3 mL in the calculator and pick the one where your dose lands on a line you can read.
Related
Peptide dosage chartDosages A to ZHow to mix a vialHow to read a syringeUnits, mL and mg
DosageFacts is an information site. It is not medical advice. Talk to a licensed professional before using any medication.