
The basics
mg, mL, units. What’s the difference?
Included in the app
PEPTIDE MATH, MADE CLEAR
See the result in mL and syringe units. Name your setup and reopen it next time. Your saved calculations stay on your iPhone.
$9.99 once. No subscription.
No account. No cloud calculator history. See what stays local →
Just need a quick number? Try the free peptide calculator.


START WITH UNDERSTANDING
mg and mcg describe mass. mL describes liquid volume. A U-100 syringe scale translates volume into markings; it does not tell you the mass without a concentration.
FAMILIAR QUESTIONS. THOUGHTFUL EXPLANATIONS.
Understand the terms behind your calculation. Read illustrated explanations of units, equipment, mixing and storage, even offline.

The basics
Included in the app

Storage
Included in the app

Your numbers
Included in the app

Your numbers
Included in the app

The basics
Included in the app
UNDERSTAND. CALCULATE. KEEP.
Enter values from your own instructions. See syringe units and mL together, then follow the arithmetic behind the result.


ONE APP. ONE PURCHASE.
A peptide calculator, saved calculations and illustrated explanations.
$9.99 once, with no subscription.
Calculations are stored locally on your device. No account or cloud sync.
Dosii explains terminology and calculates from the values you enter. It does not choose a dose or verify a product. Follow product-specific instructions and guidance from a qualified healthcare professional.