Stop Struggling withPharmacy Calculations
350+ practice problems with step-by-step solutions. Students improve their calculation scores by 72% on average.
Join 8,500+ students • 72% score improvement
Calculations are the #1 reason students fail the GPhC exam
Unit conversion errors, decimal mistakes, and time pressure cause even prepared students to lose marks. Our structured approach fixes this.
Everything You Need to Master Calculations
Dosage
85 problems
Weight-based, pediatric, geriatric
Dilutions
92 problems
Concentrations, molarity, %w/v
IV Rates
38 problems
Drip rates, infusion times
Alligation
42 problems
Mixture calculations
Plus unit conversions, pharmacokinetics, business calculations, and more
Try Free Calculations NowSee How Our Step-by-Step Method Works
Sample Question
A 70 kg patient needs digoxin 10 micrograms/kg. Stock is 250 micrograms/ml. What volume do you give?
Total dose
70 kg × 10 mcg/kg = 700 mcg
Volume needed
700 mcg ÷ 250 mcg/ml = 2.8 ml
Every question includes detailed explanations, common mistakes to avoid, and exam tips.
5 calculation questions included in free demo
Real Results from Real Students
“The step-by-step approach finally made calculations click for me.”
Aisha K.
Leeds
Calc score
45% → 89%
“Went from dreading calculations to finishing them with time to spare.”
Tom R.
Bristol
Calc score
52% → 85%
“The practice problems are exactly like the real exam.”
Fatima N.
Glasgow
Calc score
58% → 92%
Printable Formula Sheet Included
Every subscription includes a downloadable cheat sheet
Core Formulas
Dose = Weight × Dose per kg
Volume = Dose ÷ Concentration
C₁V₁ = C₂V₂ (dilutions)
Key Conversions
1 mg = 1000 micrograms
1 L = 1000 ml
1 pint = 568 ml
Less Than the Cost of One Resit
The GPhC exam costs £237. Our complete calculation practice costs a fraction of that.
One-time payment • No subscription
- 350+ calculation problems
- Step-by-step solutions
- Printable formula sheet
- Timed practice sessions
- Progress tracking
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