The Maylene toolkit
Peptide calculator.
Laboratory solution arithmetic for research. Enter a vial’s labelled peptide content and the volume of diluent added to see the concentration, then the volume and U-100 units that hold an amount you enter.
Work out the solution.
Describe the solution
Enter the labelled peptide content and the total volume of diluent added.
Enter the amount to measure
Type any amount in mg or mcg. Nothing is suggested or pre-filled.
Choose the syringe scale
Ready when you are.
Enter the vial content and diluent volume to see the concentration.
Arithmetic on the values you enter. The calculator holds no compound data and does not choose or suggest an amount.
The arithmetic
How the numbers are worked out.
Every result comes from the relationships between mass, volume and the U-100 scale below. Nothing is estimated or looked up.
- 01
Milligrams and micrograms
1 milligram (mg) = 1,000 micrograms (mcg, also written µg). To turn mcg into mg, divide by 1,000; to turn mg into mcg, multiply by 1,000.
- 02
Concentration
Concentration (mg/mL) = peptide in the vial (mg) ÷ diluent added (mL). Multiply by 1,000 for mcg/mL. The calculator takes the diluent volume as the final solution volume.
- 03
U-100 units
A U-100 scale is marked in 100 units per millilitre, so 1 unit = 0.01 mL and 10 units = 0.1 mL. A unit measures volume, not peptide content. The 1 mL, 0.5 mL and 0.3 mL scales hold 100, 50 and 30 units.
- 04
Volume and units for an amount
Volume (mL) = amount (mg) ÷ concentration (mg/mL), and units = volume (mL) × 100. Units are rounded to the nearest 0.1 (0.001 mL) and concentrations to four decimal places.
Calculator questions.
How do I convert micrograms to milligrams?
Divide by 1,000. One milligram is 1,000 micrograms, and one microgram is 0.001 milligrams. The calculator accepts the amount in either unit and converts it before working out the volume.
What is one unit on a U-100 syringe scale?
U-100 means 100 units per millilitre, so one unit is 0.01 mL. The unit is a volume marking: how much peptide one unit holds depends on the concentration of the solution, which the calculator shows as mcg per unit.
Why does adding more diluent change the result?
The peptide content stays the same while the volume grows, so the concentration falls. Doubling the diluent volume halves the concentration and doubles the volume, in mL and in units, that holds the same amount.
Why are the results rounded?
Units are shown to the nearest 0.1 unit (0.001 mL) and concentrations to four decimal places, so the display does not suggest more precision than a printed scale offers. The calculation itself uses the full values entered. Check the graduations printed on the scale you are reading.
Does the calculator know which peptide I am working with?
No. It performs arithmetic on the numbers you enter and holds no compound data, presets or typical amounts. It cannot say what amount to use; that is outside its scope.
Sources & evidence
These references define the units used in the arithmetic. They do not describe, test or certify any product.
- Metric (SI) prefixes — NIST
Defines the prefixes milli (10⁻³) and micro (10⁻⁶), the basis of 1 mg = 1,000 mcg and 1 mL = 0.001 L.
Standard or pharmacopoeia · Checked
- The International System of Units (SI Brochure, 9th edition) — BIPM
The reference for SI units and prefixes, including the litre as a unit accepted for use with the SI.
Standard or pharmacopoeia · Checked
For laboratory research only. Not for human or veterinary use. This calculator performs solution arithmetic on the values entered; it does not recommend an amount or give instructions for use.