Dosage & Household ConversionsATI TEAS 7 cheat sheet

The conversions nursing math needs

10 key facts Reviewed Oct 2026

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Volume

1 tsp = 5 mL
1 tbsp = 15 mL = 3 tsp
1 fl oz = 30 mL
1 cup = 240 mL

Weight

1 kg = 2.2 lb
1 g = 1,000 mg
1 mg = 1,000 mcg

Method

Dimensional analysis — write units as fractions so they cancel
Set it up so the unit you want ends on top

Check

Does the size make sense? A dose in grams vs milligrams is a 1,000× error

Key takeaway

The conversions nursing math needs

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