How to calculate Dosage Calculator?

This calculator uses patient weight and the prescribed mg/kg to compute the total medication dose, then converts that dose to a volume based on the solution concentration.

Key formula: Total dose (mg) = weight_kg × dose_mg_per_kg; Volume (mL) = Total dose (mg) ÷ concentration_mg_per_mL

Using the Dosage Calculator calculator: an example

Example values: patient weight 18 kg, prescribed dose 10 mg/kg, concentration 50 mg/mL.

Step-by-step calculation:

• Calculate total dose: 18 kg × 10 mg/kg = 180 mg.
• Convert to volume: 180 mg ÷ 50 mg/mL = 3.6 mL.
• Prepare and administer 3.6 mL, rounding to the nearest clinically appropriate measure.

Frequently Asked Questions

Should weight be entered in kilograms?

Yes. Always use kilograms. Convert pounds to kilograms before using the calculator to ensure correct dosing.

How should I round the calculated volume?

Round to the nearest measurable volume based on available syringes or administration devices, and follow institutional rounding guidelines.

What if the medication concentration is unknown?

Do not calculate dose if concentration is unknown. Confirm the concentration with pharmacy or product labeling before preparing the medication.

Is this calculator a substitute for clinical judgment?

No. Use the calculator as an aid. Confirm calculations, check maximum recommended doses, and apply clinical judgment before administration.