Isotretinoin (Accutane) Dose Calculator

Your details

Choose which value you want to calculate. The other two fields become inputs.
Your body weight is used to convert the daily dose into mg/kg/day and to calculate cumulative dose.
kg
The total number of milligrams taken per day. Common doses are 20, 30, 40, 60, and 80 mg.
mg/day
Total length of the treatment course. A typical course runs 16-24 weeks (4-6 months).
weeks
Cumulative doseBelow traditional minimum
80mg/kg

Total isotretinoin exposure relative to body weight

Daily dose per kg0.57mg/kg/day
Total medication5,600mg
Treatment duration20weeks
Required daily dose40mg/day
Remaining to target (150 mg/kg)70mg/kg
Progress to 150 mg/kg target1%
80 mg/kg
Below traditional minimum<120Traditional range120-150Evidence-based optimal150-220Above optimal220+
Cumulative dose (mg/kg)80
Daily dose (mg/kg/day)0.57

Cumulative dose of 80.0 mg/kg has not yet reached the 150 mg/kg evidence-based minimum.

  • A cumulative dose of 80.0 mg/kg is below the traditional minimum of 120 mg/kg and may be insufficient to achieve lasting clearance.
  • Your daily dose of 0.57 mg/kg/day is within the standard 0.5-1.0 mg/kg/day range.
  • You still need 70.0 more mg/kg to reach the 150 mg/kg minimum target.

Next stepThese calculations are for educational reference. Only a licensed dermatologist can determine the right dose and duration for your individual case, medical history, and treatment response.

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