Clinical dose calculator

Weight in, ready-to-give dose out.

Enter a patient's weight and get the dose in mg, the volume in mL, and the amount of a real pharmacy preparation, with the working shown, not just the answer.

Open the calculator How it works & sources

Try it

Change the weight, every number below re-derives.

Paracetamol for a child

per IDAI

Body weight

14 kg

Dose to give

175 mg per dose

7.29 mL syrup

4×/day

See the working

14 kg × 50 mg/kg/hari700 mg/hari
700 mg/hari ÷ 4× sehari175 mg/kali
175 mg/kali ÷ 24 mg/mL7.29 mL

Example figures using the typical 50 mg/kg/day dose (range 40–60).

Every number is traceable

A dose is a derivation, not a lookup. This is the chain, and the app shows every step of it, including where a maximum caps the result.

weight × mg/kg/daytotal daily dose
÷ frequencydose per administration
÷ stock concentrationvolume in mL
→ real preparationthe tablet, syrup or supp on hand

What's in it

What you should know

Every dose cites its source

Dosing values follow IDAI, BNFc, BNF, AHA PALS/ACLS, Kemenkes, WHO, Fornas, ISPAD, shown where the number appears, not in a footnote.

Nothing leaves the device

Every calculation runs in your browser. No server, no account, no tracking. History is stored on this device only.

Works without a connection

After one visit it installs to a home screen and keeps working with no signal, the entire drug catalog included.

DoseRx is a calculation aid, not a clinical decision support or prescribing system. Preset values are general references; verify every dose against your institutional guidelines and clinical judgement before use.

Ready to calculate?

No sign-up, nothing to install.

Start calculating