Conversions study tool
Dimensional Analysis — NUR 155
Each card shows a conversion and a real-world anchor. Tap a card to reveal the anchor — try to recall it first.
Volume — metric
🥤
1 L = 1,000 mL
A standard water bottle is 1 liter. Fill it with 1,000 individual milliliter droppers — one for every mL.
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💊
1 G = 1,000 mg
A paperclip weighs about 1 gram. Imagine 1,000 tiny dust specks making up that one paperclip.
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🔬
1 mg = 1,000 mcg
A grain of sand (mg) made of 1,000 microscopic specks (mcg). Micrograms are tiny.
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Weight — metric ↔ imperial
🏋️
1 kg = 2.2 lbs
A bag of flour is about 2.2 lbs = 1 kg. Heavy enough to feel real every time you lift it.
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Volume — imperial ↔ metric
🥃
1 oz = 30 mL
A shot glass is 1 oz = 30 mL. Cough syrup is often dosed in ounces — picture that shot glass.
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🥄
1 tsp = 5 mL
The little cup that comes with liquid Tylenol is marked at 5 mL — that's one teaspoon.
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🍽️
1 tbsp = 15 mL
3 teaspoons = 1 tablespoon. So 3 × 5 mL = 15 mL. Fill a tablespoon with three full teaspoons.
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🥛
1 cup = 240 mL
Your kitchen measuring cup with the red lines = 240 mL (8 oz × 30 mL). That's the anchor.
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Time
⏱️
1 hr = 60 min
In IV calculations you'll divide drip rates by 60 constantly. Every drip-rate problem runs through this.
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Frequency reminders
2️⃣
BID = every 12 hrs
BID = twice a day. 24 ÷ 2 = 12. Morning and night — like brushing your teeth.
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3️⃣
TID = every 8 hrs
TID = three times a day. 24 ÷ 3 = 8. Breakfast, lunch, dinner — three equally spaced doses.
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4️⃣
QID = every 6 hrs
QID = four times a day. 24 ÷ 4 = 6. Four alarm clocks at 6am, noon, 6pm, midnight.
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Ready to practice?
Once confident with the anchors, switch to Practice Problems to test yourself with real nursing-style questions.
Quick reference • 1 L=1,000 mL • 1 G=1,000 mg • 1 mg=1,000 mcg • 1 kg=2.2 lb • 1 oz=30 mL • 1 tsp=5 mL • 1 tbsp=15 mL • 1 cup=240 mL • 1 hr=60 min
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