How to Track Injections

Updated October 2026 · Educational math explainer, not medical advice.

The numbers below are made-up examples to show the arithmetic. They are not dose suggestions. Always use the dose your prescriber gave you and the instructions from your pharmacist.

A consistent log can make it easier to keep track of what you took and to share your records with your prescriber.

What to log

Date and time
Amount as prescribed, plus the units drawn
Vial concentration and the date you opened or mixed it
Injection site (if your clinician advises rotating sites)
Notes to discuss with your prescriber

Keep it private

Use a tool that stores data privately. VialMath’s dose log is a record-keeping tool only. It never suggests doses or changes.

Related guides: Multi-Dose Vial Math, How Many Units Is X mg?.

Not medical advice. VialMath is a math tool. It does not recommend doses. Follow your prescriber/pharmacist and your product labeling. All numbers on this page are illustrative only.

Check your math: Use the free VialMath calculator →

Try it with your own numbers: open the calculator. It shows every step so you can check the math.

This tool does arithmetic on numbers you enter. It does not recommend doses. Confirm with your prescriber or pharmacist.