Tools · Pets
Dog peptide dosage calculator
By An NayalLast reviewed
Two steps of pure math: a dog's weight times a dose-per-kilogram figure gives micrograms per day, and your vial setup turns that into units to draw. It does not tell you whether to dose your dog, or at what figure - that is a veterinary decision.
Read before you use this
The 2, 5 and 10 mcg/kg figures below are community-reported numbers that circulate on pet-peptide sites. There is no veterinary-established dose for BPC-157, TB-500 or any of these in dogs, and no controlled trial behind them. This tool converts a figure into a draw so the math is right - it is not advice to give your dog anything. BPC-157 and TB-500 grow blood vessels, so avoid them in any dog with known or suspected cancer, and talk to your veterinarian first.
At 5 mcg/kg, this works out to
75mcg / day
15 kg × 5 mcg/kg
Draw this much
3units
= 0.03 mL at 2.5 mg/mL
Unit math only. The mcg/kg figures are community-reported, not a veterinary-established dose - none exists - and this tool does not tell you whether to dose your animal at all. Talk to your veterinarian first.
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Worked example
The calculator opens on a 15 kg dog, the 5 mcg/kg figure (labelled Standard), a 5 mg vial mixed with 2 mL of bacteriostatic water, and a 0.3 mL syringe. It works through those numbers like this.
- Daily amount: 15 kg x 5 mcg/kg = 75 mcg.
- Convert to milligrams: 75 mcg / 1000 = 0.075 mg.
- Concentration: 5 mg / 2 mL = 2.5 mg/mL.
- Volume: 0.075 mg / 2.5 mg/mL = 0.03 mL.
- Units: 0.03 mL x 100 = 3 units.
So the result card shows 75 mcg / day, “15 kg x 5 mcg/kg”, and a draw of 3 units, “= 0.03 mL at 2.5 mg/mL”. Three units is a tenth of a 0.3 mL barrel, well inside it, so there is no warning.
Switch the figure to Low (2 mcg/kg) and the same dog comes to 30 mcg, or 1.2 units. Switch to High (10 mcg/kg) and it is 150 mcg, or 6 units. The water works the other way round: mix the same 5 mg vial with 3 mL instead of 2 and the concentration falls to about 1.67 mg/mL, so 75 mcg becomes 4.5 units, a larger mark that is easier to read.
How the math works
weight (kg) = weight (lb) x 0.453592
daily amount (mcg) = weight kg x mcg/kg
concentration (mg/mL) = vial mg / water mL
draw (mL) = (mcg / 1000) / concentration
draw (units) = draw mL x 100
Step one is a weight-based figure: body weight in kilograms times the chosen micrograms-per-kilogram figure gives a daily amount in micrograms. If you enter pounds, the calculator converts to kilograms first. Step two is the same reconstitution math the rest of the site uses: the vial's peptide mass divided by the bacteriostatic water gives a concentration in mg/mL, and the amount divided by that concentration gives the volume, shown in units on a U-100 insulin syringe, where 1 mL is 100 units.
The micrograms are rounded to a whole number, the weight to one decimal place, the units to one decimal place and the volume to three. If the draw is bigger than the syringe you picked (0.3, 0.5 or 1 mL), the card flags it as over capacity. With no weight, or no vial or water, it shows no draw at all.
In a small animal the draws are tiny, so a smaller syringe and a slightly higher water volume make the amount easier to measure accurately.
Keep reading
Questions people ask
How many mcg is 5 mcg/kg for a 20 kg dog?
Weight times the figure: 20 kg x 5 mcg/kg = 100 mcg. That is arithmetic on a community-reported number, not a veterinary dose. No veterinary-established dose exists for these peptides in dogs.
How do I enter my dog's weight in pounds?
Switch the unit to lb. The calculator multiplies pounds by 0.453592 to get kilograms before it does anything else, so 33 lb becomes about 15 kg.
Where do the 2, 5 and 10 mcg/kg figures come from?
They are the numbers that circulate on pet-peptide sites. There is no controlled trial behind them and no veterinary-established dose, which is why the tool labels them community figures and does the math only.
Why does the calculator start on a 0.3 mL syringe?
Draws for a small animal are tiny. On a 0.3 mL syringe, 3 units fills a tenth of the barrel; on a 1 mL syringe it is three hundredths. The math is the same either way; the smaller barrel is just easier to read.
Pepteca is for education and information only. It does not provide medical advice, diagnosis, or treatment, and its calculators perform unit math only. Always verify with a licensed provider before starting, changing, or stopping any protocol. Many peptides are not approved for human use and may be regulated differently where you live.