HESI A2 math practice is the fastest way to lift your overall score, because math is a section you can improve with repetition. You don’t need to be a “math person.” You need the right formulas and enough practice to use them quickly.
This guide gives you 10 easy formulas, worked examples and a simple routine for your HESI A2 math practice.
What Math Is on the HESI A2?
The math section covers everyday arithmetic and healthcare-style calculations. Expect these topics:
- Fractions, decimals and percentages
- Ratios and proportions
- Unit conversions
- Basic algebra
- Dosage calculations
- Military time and Roman numerals
Topics can vary by exam version, so confirm what your program tests.
10 Easy Formulas for HESI A2 Math Practice
Memorize these, then use them in every HESI A2 math practice session:
- Percent: part ÷ whole × 100
- Percent change: (new − old) ÷ old × 100
- Proportions: if a/b = c/d, then a × d = b × c
- Fraction to decimal: numerator ÷ denominator
- Mean (average): sum of values ÷ number of values
- Dosage: (desired dose ÷ dose on hand) × quantity
- Weight: 1 kg = 2.2 lb
- Temperature: °F = (°C × 9/5) + 32, and °C = (°F − 32) × 5/9
- Metric: 1 g = 1,000 mg, 1 mg = 1,000 mcg, 1 L = 1,000 mL
- Household: 1 tsp = 5 mL, 1 tbsp = 15 mL, 1 oz = 30 mL
Some exams provide their own conversion tables, so check which values your test uses.
Worked Examples for HESI A2 Math Practice
Percent: What percent of 60 is 18?
18 ÷ 60 × 100 = 30%
Ratio: If 3:5 = x:40, find x.
3 × 40 = 5 × x, so x = 120 ÷ 5 = 24
Weight: Convert 154 lb to kg.
154 ÷ 2.2 = 70 kg
Temperature: Convert 104°F to °C.
(104 − 32) × 5/9 = 40°C
Dosage: The order is 75 mg. The label reads 50 mg per 5 mL. How many mL?
(75 ÷ 50) × 5 = 7.5 mL
Write out each step, even when the math feels easy. Skipped steps cause most careless errors.
A Simple HESI A2 Math Practice Routine
Short, daily sessions beat long weekend cramming. Try this routine:
- Spend 5 minutes reviewing one formula.
- Solve 10 practice questions.
- Check your answers and note every miss.
- Redo missed questions two days later.
Fifteen to thirty minutes a day is enough for steady progress. Take one timed set each week to build speed.
Common Mistakes in HESI A2 Math Practice
- Mixing up units. Convert first, then calculate.
- Skipping the units in the answer. mg and mL are not interchangeable.
- Rushing dosage problems. Re-read the order and the label twice.
- Memorizing without practicing. Formulas only stick when you use them.
Best Resources for HESI A2 Math Practice
Start with our free practice tests to find your weak topics. Then use structured notes with worked solutions. Our 9-in-1 HESI A2 study bundle includes a math guide covering conversions, ratios, percentages, fractions and dosage calculations, with step-by-step solutions.
FAQ
Is a calculator allowed on the HESI A2 math section?
Many testing sites provide an on-screen calculator, but rules can vary by school. Confirm with your testing center, and practice without a calculator too, so you stay fast either way.
How long should I do HESI A2 math practice?
Most students benefit from 3 to 4 weeks of steady daily practice. Start earlier if fractions and conversions feel rusty.
Start Your HESI A2 Math Practice Today
Great HESI A2 math practice is simple: learn the formulas, solve questions daily and review every miss. Do that consistently, and math can become one of your strongest sections.
Get step-by-step solutions in our complete HESI A2 study bundle, and ask questions in our HESI A2 study group on Facebook.
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