Adderall Dosage Calculator

Health

The Adderall Dosage Calculator gives a rough, weight-based reference for typical starting daily amphetamine doses used for ADHD, based on the commonly cited 0.2–0.5 mg per kg per day range. It is for general education only and is not medical advice. Actual dosing must be set and adjusted by a prescribing clinician.

Rates and fees change frequently. Always confirm the current figures with the official authority before relying on this result.

Formula

Reference daily dose ≈ body weight (kg) × 0.2 to 0.5 mg/kg/day
  • This uses the commonly cited weight-based range of 0.2–0.5 mg/kg/day for amphetamine in ADHD, with ~0.3 mg/kg/day shown as a mid starting reference.
  • Real prescribing usually starts at a low fixed dose (often 5 mg once or twice daily) and is titrated upward based on response and tolerability, not by weight alone.
  • Total daily amounts are often split into divided doses, and immediate-release versus extended-release products are dosed differently.
  • This tool does not account for age, other medications, medical history, or product formulation. It is not a substitute for professional medical advice.

Example Calculation

Inputs
  • Body weight (kg): 30

For a 30 kg person, 0.3 mg/kg/day is about 9 mg/day (shown rounded), with a typical reference range of roughly 6–15 mg/day. A clinician would still start low and adjust.

Frequently asked questions

Is this a prescription or medical advice?
No. It is an educational, weight-based reference only. Dosing decisions must be made by a qualified prescriber who knows your full medical history.
Where does the 0.2–0.5 mg/kg/day range come from?
It is a commonly cited weight-based range for amphetamine in ADHD. Individual dosing varies widely and is set by clinical response, not weight alone.
Why is the real starting dose often a fixed amount?
Clinicians usually begin with a low fixed dose (such as 5 mg once or twice daily) and titrate gradually, which is safer than dosing purely by body weight.
Does this account for immediate vs extended release?
No. IR and XR products are dosed and divided differently. This tool gives only a single total-daily reference figure.
What should I do with this number?
Use it only to understand the general scale. Discuss any actual dosing with your doctor or pharmacist.