Calculate the correct medication dosage based on patient weight. Enter the ordered dose per kilogram, patient weight, and drug concentration to determine the total dose and volume to administer.
Amount of drug
Volume containing that amount
Total Dose
700.00 mg
Volume to Administer
7.00 mL
Always verify calculations independently and follow your facility's medication administration policies. This calculator is for educational reference only.
Calculation Breakdown
700.0
mg needed
100/1
mg per mL
Requires approximately 7.0 vials (1 mL each)
Times shown are illustrative. Follow prescriber-specified dosing intervals.
Patient weight: 70.0 kg (Adult range) | Ordered dose: 10 mg/kg
25-50 mg/kg/day
500-1000 mg/dose
5-10 mg/kg/dose
200-400 mg/dose
10-15 mg/kg/dose
500-1000 mg/dose
25-50 mg/kg/day
250-500 mg/dose
Adult dosing is typically fixed-dose. Weight-based dosing may apply for certain medications.
7.00 mL
Milliliters
1.40 tsp
Teaspoons
1 tsp = 5 mL
0.47 tbsp
Tablespoons
1 tbsp = 15 mL
~140 drops
Drops (est.)
~20 drops/mL
Weight-based dosing is one of the most common methods for calculating medication doses, especially in pediatric and critical care settings. The dose is individualized to the patient's body weight, typically expressed as mg/kg or mcg/kg. Accurate weight measurement and careful calculation are essential to avoid underdosing or toxicity.
Multiply the ordered dose (in mg/kg or mcg/kg) by the patient's weight in kilograms. For example, if the order is 5 mg/kg and the patient weighs 70 kg, the total dose is 5 × 70 = 350 mg.
Divide the weight in pounds by 2.2 (or multiply by 0.4536). For example, a 154 lb patient weighs approximately 70 kg. This calculator handles the conversion automatically when you select pounds.
Drug concentration describes how much active drug is dissolved in a given volume, such as 100 mg per 1 mL. To find the volume to administer, divide the total dose by the concentration: Volume (mL) = Total Dose (mg) ÷ Concentration (mg/mL).
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