🔢 Dosage Calculations
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6 clinical calculators
Practice
300+ randomized problems
Flashcards
30 medication cards
Dosage Calculation D/H × V
Formula: (Desired ÷ Have) × Vehicle = Amount to give
IV Rate mL/hr
Formula: Total Volume (mL) ÷ Time (hr) = Rate (mL/hr)
IV Drip Rate gtt/min
Formula: (Volume × Drop Factor) ÷ Time (min) = gtt/min
Weight-Based Dosing mg/kg
Formula: Weight (kg) × Dose (mg/kg) = Single Dose (mg)
Unit Conversion
Quick Reference
1 kg = 2.2 lbs1 g = 1000 mg
1 mg = 1000 mcg1 L = 1000 mL
1 fl oz = 30 mL1 tsp = 5 mL
1 tbsp = 15 mL1 grain = 60 mg
Creatinine Clearance Cockcroft-Gault
CrCl = [(140 – Age) × Weight (kg)] ÷ [72 × SCr] × (0.85 if female)
CrCl Staging
≥ 90 mL/min — Normal
60–89 mL/min — Mild decrease (CKD G2)
30–59 mL/min — Moderate (CKD G3) — dose adjust many drugs
15–29 mL/min — Severe (CKD G4) — significant restrictions
< 15 mL/min — Kidney failure (CKD G5) — dialysis consideration
Dosage Practice
300+ template-generated problems across 10 categories. Values randomize every session.
Medication Flashcards
Label on front · Tap to reveal calculation
NDC 0641-6085-25
Naloxone HCl
Opioid Antagonist · Injection
2 mg / 2 mL
Concentration: 1 mg/mL
For IV, IM, or SC use · Store 20°–25°C
Order to fill
Order: Naloxone 0.4 mg IV push. How many mL?
Naloxone HCl
Answer
0.4 mL
0.4 mg ÷ 1 mg/mL = 0.4 mL
Tap card to flip · Answer shown on back
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