Peptide Dosage Calculator
Convert a prescribed amount into mL and U-100 syringe units. Enter your own numbers — nothing is pre-filled or recommended.
The formula
- Concentration = amount in vial (mcg) ÷ diluent (mL)
- Volume = amount per injection (mcg) ÷ concentration (mcg/mL)
- Syringe units = volume (mL) × 100 (U-100 syringe)
Worked example (arithmetic only): 5 mg = 5,000 mcg in a vial with 2 mL diluent → 2,500 mcg/mL. For an entered amount of 250 mcg: 250 ÷ 2,500 = 0.1 mL = 10 units.
Other calculators
- Reconstitution calculator — how much diluent gives a convenient number of units per draw
- Peptide blend / mixing calculator — several compounds in one vial
- Tirzepatide calculator — unit conversion with FDA label references
- Semaglutide calculator — Ozempic/Wegovy strengths from the FDA label
- General converters: mg to mL · mL to cc · mcg to mg · IU to mg (vitamins) · syringe sizes · needle gauge chart
- Nursing & everyday health math: IV drip rate · mL per hour · teaspoon to mL · drops to mL · BMI calculator · lbs to kg
- Lab & body units: blood sugar mg/dL ⇄ mmol/L · A1c to average glucose · cholesterol converter · Fahrenheit to Celsius · oz to mL · cm to feet
- More lab & weight units: vitamin D ng/mL⇄nmol/L · creatinine mg/dL⇄µmol/L · hemoglobin g/dL⇄g/L · mmHg⇄kPa · kg to lbs · grams to ounces · pounds to stone
- Peptide chemistry: peptide molecular weight calculator · amino acid chart · codon chart & translator · mg to mcg · ng to mcg · molarity calculator · dilution C1V1=C2V2 · blood type chart · RPM to g · ppm to mg/L · mEq to mg · liters to gallons · buffer pH · percent solution · grams to moles · °C to K · µL to mL · inches to cm · triglycerides mg/dL⇄mmol/L · uric acid mg/dL⇄µmol/L · cups to mL · tablespoon to mL · kg to stone
- BAC water calculator — how much bacteriostatic water, and what it does to concentration
- Units to mg calculator — two-way units ⇄ mg converter
- Tirzepatide units to mg · Semaglutide units to mg — charts by concentration
- Retatrutide calculator — unit math plus trial/FDA status
- KLOW blend calculator — four-compound vial math
- GLOW blend calculator · MOTS-c calculator · SS-31 calculator · Cagrilintide · DSIP · KPV · Selank · all peptide calculators — vial math only, no dosing information
- BPC-157 calculator — vial-to-units math with FDA status
- mcg to units chart — printable reference tables
- How to choose a reconstitution calculator — checklist and test cases
- How to read insulin syringe units
FAQ
What does this peptide dosage calculator do?
It converts the numbers you enter — vial amount, diluent volume and amount per injection — into a volume in mL and the matching mark on a U-100 insulin syringe. It does not suggest any dose.
How many mcg are in 1 mg?
1 mg = 1,000 mcg. The calculator converts automatically when you switch units.
What is a U-100 syringe unit?
On a U-100 syringe, 100 units equal 1 mL, so 1 unit = 0.01 mL. See the syringe units guide for how to read the markings.
Is this a peptide dose calculator for any compound?
The math (amount ÷ concentration) is the same for any reconstituted powder. Whether a product or amount is appropriate is a decision for your prescriber, not this tool.
Last updated: · Found an error? Report it.