Dosage Calculator

Your details

Your body weight. The calculator converts pounds to kg internally.
kg
Weight-based dosing is common for children and many antibiotics. Fixed dosing is typical for over-the-counter medicines.
Enter the dose your prescriber ordered, per administration. For weight-based dosing this is mg per kg of body weight PER DOSE, not per day. If your prescription is written as mg/kg/day, divide it by the number of doses per day first (45 mg/kg/day split twice daily = 22.5 mg/kg per dose).
mg/kg
How often the medication is taken per day.
The amount of active drug in each tablet or capsule.
mg
Total number of days of treatment, used to estimate total medicine needed.
days
Dose per administrationDose calculated
700mg

Amount of active drug to take each time

Total daily dose1,400mg
Tablets per dose1.4
Total course dose9,800mg
Single dose (mg)700
Daily total (mg)1,400

Single dose: 700.0 mg (twice daily)

  • Your single dose is 700.0 mg, taken twice daily (2 times per day).
  • Your total daily intake is 1400.0 mg.
  • This is a weight-based dose of 10.00 mg/kg using your body weight of 70.0 kg.
  • You need 1.40 tablets per dose. If this is not a whole number, ask your pharmacist about splitting or an alternative strength.

Next stepAlways follow your prescriber's exact instructions. If the dose calculated here differs from your prescription label, contact your pharmacist before taking any medication.

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