Free calculator

Medication level calculator

Chart an estimate from the doses, schedule and half-life you enter.

Enter the doses you take, how often you take them and a half-life, and this charts an estimate of how the amount builds up and falls between shots.

It is arithmetic on the numbers you enter. It knows nothing about your medication or your body, and it isn't medical advice, so please don't make decisions based on it. Your prescriber is the person for those.

An editable default, not medical information.
days
weeks
days ago
0 if it was today.

An estimate from the numbers you entered. Not medical advice or information about your medication. Follow your prescriber. The chart is a model of the doses, schedule and half-life typed in above, nothing more. It is not a blood test and can't tell you anything about your own levels. Tirzing doesn't sell, recommend or endorse any medication. Retatrutide and cagrilintide are investigational and not FDA-approved.

Questions people ask

What does this calculator show?

A chart of an estimated amount of medication over time, worked out from the doses, schedule and half-life you enter. It is arithmetic on your numbers, not a measurement and not information about any medication.

Where does the half-life come from?

Picking a medication fills in the same editable default Tirzing uses when you add that medication in the app. It is an editable default, not medical information. Change it to any value, or pick "Another medication" and enter your own.

Can I use it for retatrutide or another peptide?

Yes. Pick it from the list, or choose "Another medication" and enter a half-life. Tirzing doesn't sell, recommend or endorse any medication. Retatrutide is investigational and not FDA-approved.

Can it show a change of dose?

Yes. Tick "My dose changed", then enter the earlier dose and how many weeks you were on it, and the chart includes both.

Can I make decisions based on it?

No. It is an estimate from the numbers you entered. Not medical advice or information about your medication. Follow your prescriber.

Try the other free tools

Your chart, from the shots you log

Here you're describing your shots from memory. In Tirzing, every shot you log goes onto your medication-level chart, so a late shot, a missed week or a dose change is already in it, using half-lives you can edit for each medication.