Calculator — daily dose
Daily dose calculator
Calculate the daily dose by weight and the dose per administration, and the volume in ml if you know the strength.
Short answer: Dose per administration = (mg/kg/day × weight) ÷ number of doses. 15 mg/kg/day, 20 kg and three doses a day gives 100 mg per dose.
Daily dose calculator
Enter the dose per kg per day, the weight and the number of doses. Add the strength to get the volume in ml.
Calculate the daily dose and dose per administration
The formula
Daily dose = mg/kg/day × Weight
Dose per administration = Daily dose ÷ Number of doses
Example: 15 × 20 = 300 mg per day. 300 ÷ 3 = 100 mg per dose. With a strength of 50 mg/ml: 100 ÷ 50 = 2 ml.
More on prescriptions such as 1 × 3 is in daily dose and timing.
Frequently asked questions
How do you calculate a daily dose?+
Multiply mg/kg/day by the patient's weight.
How do you calculate the dose per administration?+
Divide the daily dose by the number of doses per day.
How do I get the volume in ml?+
Divide the dose per administration by the strength in mg/ml.
Practise dose per kg in Dos
Dos is a practice app for drug calculations. It has practice tests of ten questions, a built-in calculator next to each question, and statistics per topic.
