Dosage Calculations

Enter values — each calculator shows the full step-by-step breakdown.

Basic Conversions

mg ↔ g ↔ mcg, mL ↔ L

CategoryValue

FromTo

Oral Medications

Tablets, capsules, syrups

Desired dose (ordered)

Available strength

Volume per dose (liquids only — leave blank for tablets)

Injectable Medications

IV, IM, SC injections

Desired dose

Available strength

Per volume

IV Flow Rate (gtt/min)

Manual gravity drip rate

Total volume to infuse

Time

hours

Drop factor (tubing)

gtt/mL

IV Infusion Pump

Programmed mL/hr rate

Total volume

Time

hours

Drop Factor (Macro / Microdrip)

Pick tubing type and calculate gtt/min

Tubing

Volume

Time

minutes

Weight-Based Dosing

mg/kg or mcg/kg/min

Type

Patient weight

Ordered dose

mg/kg

Pediatric Dosage

Weight-based pediatric dosing

Child weight

Recommended dose

mg/kg/day

Doses per day (optional)

× / day

Safe Dosage Range

Verify ordered dose against safe range

Patient weight

Low limit

mg/kg

High limit

mg/kg

Ordered dose (optional)

Reconstitution

Powdered drugs requiring diluent

Drug amount in vial

Diluent added

Ordered dose

Insulin Dosage

Units → mL conversion

Ordered insulin

units

Insulin concentration

units/mL

Heparin Infusion

High-alert IV anticoagulant

Calculate

Heparin in bag

units

Bag volume

Ordered rate

units/hr

Continuous IV Infusion

mcg/kg/min drips (e.g., pressors)

Drug in bag

Bag volume

Patient weight

Ordered dose

mcg/kg/min

Disclaimer: PharmPal Nurse is for education only and is not medical advice. Do not use it to diagnose, treat, prescribe, or make patient-care decisions; always verify with current drug references, your instructor, facility policy, and a licensed provider. In emergencies, call local emergency services.