Nursing Dosage Calculator

Dose wanted (desired)The amount of drug to be given in one dose.

Dose unit

Strength on hand (have)The labelled amount of drug in the stock container or vial.

Strength unit

Volume that strength is in (quantity)

Stock volume unit

Volume given

Given volume unit

Body weight

Weight unit

Dose per kilogram (or mg/kg ceiling)Used for weight-based dosing and for the maximum-dose ceiling.

Dose-per-kg unit

Height

Height unit

BSA formula

Dose per square metre

Dose-per-m² unit

Tablet strength

Tablet strength unit

Doses per day

Quantity dispensed (tablets or mL)

Quantity per dose (tablets or mL)

Diluent added (mL)

Powder displacement volume (mL)The volume the dry powder itself occupies once dissolved, from the product label.

Solution strength (% w/v) (%)Used when a solution is labelled as a percentage, e.g. 1% lidocaine = 10 mg/mL.

Titration start dose

Titration increment

Weeks at each step

Maximum dose

Volume to give

2.500 mL

Medication Dosage Calculator

Dose

250.000 mg

Concentration

100.0000 mg/mL

Concentration

10.0000 % w/v

Total daily dose

250.000 mg

Calculation performed

Desired over have (D/H x Q)

Worked out from United States Pharmacopeia, General Notices 8.140 - percentage concentrations: % w/v is grams of constituent per 100 mL of solution and 4 other sources.

Educational calculation only. Always verify every dose against the product label and your institution's policy before administering a medicine.

How this is worked out

2 steps

Concentration = 500 mg / 5 mL = 100 mg/mL
Volume = dose / concentration = 250 mg / 100 mg/mL = 2.5 mL

Results are general information, not financial, tax, legal, medical or engineering advice.