ToolsPharmacy tools
Pharmacy tools
Dosage, IV drip rates, dilution, days supply, BSA, and liquid dose helpers for pharmacy math.
BSA Calculator
Estimate body surface area (m²) with the Mosteller formula from height and weight.
Days Supply Calculator
Calculate prescription days supply from quantity dispensed, dose amount, and doses per day.
Dilution Calculator
Use C₁V₁ = C₂V₂ to find how much stock and diluent you need for a target concentration and volume.
Dosage Calculator
Calculate a weight-based drug dose (mg/kg) and daily total from patient weight and frequency.
IV Drip Rate Calculator
Calculate IV pump rate (mL/hr) and gravity drip rate (gtt/min) from volume, time, and drop factor.
Liquid Dose Calculator
Convert an ordered mg dose into mL using the liquid’s concentration (mg/mL).
Pediatric Dose Calculator
Estimate pediatric doses with Clark's rule, Young's rule, or mg/kg weight-based dosing.
About pharmacy tools on Bestrao
Pharmacy tools help with everyday dosing and compounding math: weight-based doses, liquid volumes, IV drip rates, dilutions, days supply, BSA, and classic pediatric rules.
They are built for quick checks and study — not as a replacement for a licensed pharmacist, labeled dosing, or clinical judgment.
Why pharmacy math tools matter
A misplaced decimal in mg/kg or mL/hr can be dangerous. Re-running the arithmetic in a clear form reduces transcription mistakes when you already know the intended order.
Students and technicians also benefit from transparent formulas (C₁V₁ = C₂V₂, Mosteller BSA, Clark’s and Young’s rules) while they learn.
When to use these tools
Step 1
Double-checking a weight-based or liquid dose calculation
Step 2
Estimating IV pump or gravity drip rates from volume and time
Step 3
Preparing a simple dilution from stock concentration
Step 4
Estimating days supply before a refill conversation
Step 5
Practicing pediatric dose rules alongside labeled mg/kg dosing
Common mistakes to avoid
01
Mismatched units
Keep mg with mg/mL, and tablets with tablets. Convert mg/5 mL labels to mg/mL before using the liquid dose tool.
02
Ignoring max doses
Weight-based math can exceed a product’s maximum. Always check the reference and protocol caps.
03
Treating teaching rules as standards
Clark’s and Young’s rules are historical estimates. Prefer labeled pediatric dosing whenever it exists.
Frequently asked questions
Are pharmacy tools medical advice?
No. They are informational calculators. Verify every dose with a licensed clinician or pharmacist and an official drug reference.
Do calculations leave my device?
No. These tools run in your browser. Nothing you enter is required to be uploaded for the math to work.
Where should I start?
Try the Dosage or Liquid Dose calculators for common orders, or open the full Pharmacy Toolkit collection.