Health & Fitness
Medication Dosage Calculator
Medication Dosage: it estimates a weight-based dose = body weight × dose per kg. Worked through below with real figures, and the calculator repeats the working on your own inputs — free, on-device, instant.
Enter your patient weight and dose and Medication Dosage Calculator works out an estimated dose — a guide, not a prescription with weight-based dosing — fast, free and private, with no sign-up or uploads.
About this calculator
It estimates a weight-based dose = body weight × dose per kg. It matters when you want a quick screening number before deciding whether a habit, plan or measurement deserves a closer look. Worked below as At 10 mg/kg for a 20 kg child: 10 × 20 = 200 mg per dose — an illustration only; always follow the prescription and a clinician's instructions. — and the calculator on this page repeats exactly that working for your inputs, instantly, and offline after load.
How to use
- Enter the patient’s weight in kilograms.
- Enter the dose in milligrams per kilogram.
- Press Calculate to see the arithmetic result in mg.
- Verify every dose with a pharmacist or doctor.
Why use Medication Dosage Calculator
Fast
Calculations run in your browser. No round trip to a server.
Private
Your inputs never leave your device. Nothing is uploaded.
Free
No signup, no paywall, no ads-in-results, no watermarks.
Educational
Generic mg/kg arithmetic only. Not prescribing advice.
Mobile-ready
Optimised for phones, tablets, and desktops alike.
Transparent
Clear about the method used and its limits, with disclaimers where they matter.
Common uses
Medication Dosage as a sanity-check, not a prescription
Medication Dosage in a study or teaching context
Use it for understanding a formula
Use it for general awareness
Use it when double-checking a calculation
Use it for medical advice
Technical notes
Medication Dosage Calculator estimates a weight-based dose = body weight × dose per kg. It is a rough guide, not a prescription.
These are general-population estimates and not a substitute for advice from a qualified clinician.
Results are rounded for display; the underlying calculation keeps full precision.
FAQ
Why is this not a prescribing tool?
It only multiplies weight by a mg/kg figure. It ignores maximum doses, drug choice, age, kidney and liver function, and concentration — all of which a real prescription requires.
What does mg/kg mean?
It is a dose expressed per kilogram of body weight, so the total dose is the mg/kg value multiplied by the patient’s weight in kilograms.
Can I use this to give someone medicine?
No. Never dose medication from this output. Confirm the correct dose, maximum, and formulation with a pharmacist, doctor, or official drug label.
Does the Medication Dosage Calculator send my data to a server?
No. The Medication Dosage Calculator runs entirely in your browser — your inputs never leave your device, and nothing is uploaded or stored.
Worked example
At 10 mg/kg for a 20 kg child: 10 × 20 = 200 mg per dose — an illustration only; always follow the prescription and a clinician's instructions.