Drug Half-Life Calculator

For context, see my blog.

Global input

Dosage:mg (units don't matter)
Percentage elimination to consider (below) close enough to 100%:%
Half-life:hours

If taken regularly

Time between doses:hours
Stabilized daily min–max (sum of residuals): mg (x)
To ramp up to maximum level (within the percentage above): doses ()
To ramp back down from maximum (within the percentage above): hours (days)

If taken once

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