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 Browse 92 drugs

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, Fornas, WHO, Kemenkes, 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