Drug Half-Life Calculator

For context, see my blog.

Global input

Dosage:mg (units don't matter)
Percentage of interest (see below):%

If taken regularly

Time between doses:hours
Actual daily maximum: mg
To reach maximum level (within the percentage of interest): doses

If taken once

Time for one isolated dose to drop within the percentage of interest: hours (days)
Level after 24 hours, for one isolated dose: mg