How weight-based formulas work

See the arithmetic behind per-kilogram formulas using fictional numbers. Not for working out real doses.

Educational, fictional examples

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Amount per kilogram

Body weight

Total (educational)

Enter values to see the result and the working.

Educational arithmetic with fictional numbers. Real weight-based prescribing uses approved labeling and a clinician's judgment; there is no established weight-based basis for unapproved research compounds. Arithmetic only. This result is not evidence that any amount is safe, appropriate or effective, and it is not medical advice. Confirm with your prescriber or pharmacist.

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