Titrating between scheduled doses? Estimate the dose that would model the same medication level.
Tirzing is a personal tracking tool, not a medical device, a pharmacy, or a healthcare provider. This calculator estimates medication levels with a mathematical model. It has never met you.
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Say you took 5 mg on Monday and it's Wednesday. A settled 7.5 mg cycle would still have four days of the earlier dose on board, so a fresh 7.5 mg would sit higher than that, and "the difference" (2.5 mg) only matches by coincidence.
This calculator estimates the one-time dose that would produce approximately the modeled medication level associated with your selected new dose, based on published average pharmacokinetic values. It does not determine whether you should change your dose, or when you should take medication. It shows the model's working so you can check it rather than trust it.
This is an estimate for personal tracking, not medical advice. It models your medication level with a one-compartment (Bateman) curve using published average half-lives. Your body isn't average, and the model doesn't know your history, your side effects or your prescriber's plan. Dose changes are a conversation to have with them, not with a web page.
Here you're typing your history in from memory. In the app it already knows every shot, and every dose change, so your medication-level curve, supply runway and titration plan all come from the real thing.