Accutane / Isotretinoin Cumulative Dose Calculator

Free educational Accutane / isotretinoin cumulative dose calculator: mg/kg from total mg and weight, optional hypothetical target math, scenario sensitivity rows—plus a long guide. Not medical advice or prescribing.

Accutane Dosage Calculator (Educational) | Isotretinoin Cumulative mg/kg

Prescription safety notice: Isotretinoin is a high-risk prescription medicine with strict programs (for example REMS in the United States) and serious pregnancy risks. This page is educational only. It does not tell you what to take, change your dose, or replace your dermatologist, pharmacist, or program requirements. Never start, stop, split, or “recalculate” medication without licensed medical guidance.

Summary: Many clinicians discuss isotretinoin using total milligrams per kilogram of body weight over a course (cumulative mg/kg). This tool helps you do the arithmetic—like a mortgage calculator’s “what-if” rows—so you can understand numbers you already received from a prescriber or pharmacy record. It does not pick a daily tablet strength for you.

What this tool does — and does not (tap to expand)
  • Does: converts your entered total mg and weight (kg) into cumulative mg/kg, shows a few sensitivity rows (±5% on totals or weight—illustrative only), and optionally estimates total mg for a hypothetical cumulative target mg/kg you type in for classroom-style discussion with a clinician.
  • Does not: interpret labs, manage side effects, handle pregnancy prevention testing, or replace program enrollment, dispensing rules, or individualized prescribing decisions.

“Accutane®” is a registered trademark used here in a descriptive sense; this site is not affiliated with the brand owner. Generic isotretinoin is prescribed under many names and strengths.

Isotretinoin (Accutane) cumulative dose calculator

Enter numbers from your care team or pharmacy totals. After you calculate, you will see your baseline cumulative mg/kg, a small scenario table (similar spirit to the mortgage calculator’s stress rows), and—if you fill it in—an illustrative total mg line for a hypothetical cumulative target mg/kg (not a recommendation).

Assumptions & methodology (short)
  • Cumulative mg/kg = total isotretinoin milligrams ÷ body weight in kilograms.
  • Total mg illustrative line = (target mg/kg) × (weight kg). Targets vary by person, region, tolerability, and clinician judgment.
  • Scenario rows adjust only one input at a time (±5% total mg, or ±5% weight) to show how sensitive the ratio is to rounding or record-keeping error—not to suggest changing your real dose.
Core inputs (from your records)

Use the same units your clinician used for prior discussions (often kilograms).

Example only: sum of dispensed mg across the course so far (ask your pharmacist how to total capsules if unsure).

Optional: hypothetical cumulative target (discussion aid)

Some clinicians discuss course totals using cumulative mg/kg ranges seen in textbooks—your target may differ. Leave blank if you are not reviewing that concept today.

Your cumulative mg/kg and scenario rows will appear here.

For how cumulative dosing is discussed in clinic, what REMS-style programs do in plain language, and questions worth asking your dermatologist, read Understanding isotretinoin totals without playing doctor below.