Divide the vial strength by the diluent volume to find concentration, then divide the prescribed dose by that concentration to find the volume to draw into a syringe.
Peptide & Medication Dosage Calculator
Injection volume for a reconstituted peptide or liquid medication given its concentration and your prescribed dose, or the number of tablets for a given tablet strength.
Calculating Peptide and Medication Dosage Volume
Reconstituted peptides and liquid medications are typically prescribed as a dose in micrograms or milligrams, but must be measured out as a liquid volume using a syringe — this calculator converts between the two, and also handles simple tablet/capsule dose splitting. It covers searches like peptide reconstitution calculator, peptide dosage calculator, and insulin syringe units calculator. This tool performs the volume and tablet-count arithmetic only, for a dose your prescriber has already specified — it does not recommend, suggest, or validate any dose or protocol, and many peptides referenced by these searches are not FDA-approved for human use and carry real safety uncertainty outside clinical supervision.
How the Peptide & Medication Dosage Calculator Works
Formula (Liquid / Reconstituted)
Concentration = Vial strength ÷ Diluent volume
Volume to draw = (Dose ÷ 1,000) ÷ Concentration
Units on a U-100 syringe = Volume to draw (mL) × 100
Formula (Tablets/Capsules)
Tablets needed = Prescribed dose ÷ Tablet strength
Worked Example (Liquid)
A 5 mg vial reconstituted with 2 mL of diluent, with a prescribed dose of 250 mcg: Concentration = 5 ÷ 2 = 2.5 mg/mL. Volume to draw = (250 ÷ 1,000) ÷ 2.5 = 0.25 ÷ 2.5 = 0.1 mL. On a U-100 syringe: 0.1 × 100 = 10 units.
Why a Fractional Tablet Result Needs a Pharmacist’s Input
If the tablet-count formula returns a fraction (such as 1.5 tablets), splitting a tablet isn’t always safe or accurate — some tablets aren’t scored for even splitting, and some (like extended-release or enteric-coated formulations) shouldn’t be split at all, so check with a pharmacist before acting on a fractional tablet result.
Frequently Asked Questions
What does U-100 mean on an insulin syringe?
A U-100 syringe is calibrated so that 1 mL equals 100 units, which is the standard scale printed on most insulin syringes — converting a calculated volume in mL to units on this scale makes it easier to draw an exact dose using that syringe’s markings.
Does this calculator tell me what dose I should be taking?
No — this tool only converts a dose your prescriber has already specified into the corresponding liquid volume or tablet count; it does not recommend, validate, or suggest a dosage for any medication or substance.
Why does the formula divide the dose by 1,000 in the liquid mode?
The prescribed dose is entered in micrograms (mcg) while vial strength and concentration are typically expressed in milligrams (mg), and dividing by 1,000 converts micrograms to milligrams so the units match before dividing by concentration.
Are peptides like BPC-157 or TB-500 approved for human use?
No — many peptides referenced in dosage searches, including BPC-157, TB-500, CJC-1295, ipamorelin, tesamorelin, and melanotan, are not FDA-approved for human use and carry real safety uncertainty outside clinical supervision; this calculator performs arithmetic only and does not endorse or validate their use.
What if my diluent volume changes the concentration significantly?
Adding more diluent lowers the concentration (more mL per mg), meaning a larger volume must be drawn for the same dose, while less diluent raises concentration and requires a smaller draw volume — always recalculate the volume to draw whenever the diluent amount changes.