Scientific explanations
Background rationale and common pitfalls are captured with every tool.
Regulation-aware calculators
Accurate Pharmaceutical Calculators
Trusted tools for precise pharma calculations, with explicit formulas, assumptions, and audit-ready outputs.
Explain before calculate
Each calculator includes the scientific rationale, regulatory references, and validation checks before results are generated.
Transparent formulas and assumptions
Guidance aligned with FDA, EMA, ICH, USP, ISPE, PDA
Audit-ready exports with timestamps and versions
9core calculators
<200mssingle calc target
Excel + PDFexport ready
Informed & compliant
Built for technical teams who need transparent, defensible calculations.
Regulatory references
Read-only guidance aligned with FDA, EMA, ICH, USP, ISPE, and PDA.
Validated results
Deterministic outputs with timestamps, versions, and audit trails.
Guidelines & references
Curated sources that inform calculation assumptions and safeguards.
Reference library
Searchable summaries linked to official guidance. We keep content read-only and non-interpretive to reduce regulatory risk.
FDAEMAICHUSPISPEPDA
Use case flow
- Select the calculator and review background.
- Enter inputs or upload your Excel template.
- Validate data, run calculation, export results.
GDPR-ready handling for uploads and exports.
Audit-ready outputs
Every result includes formula details, inputs, and versioned context.
Exports
Excel and PDF with inputs, outputs, formulas, and timestamps.
Validation
Row-level checks, error reporting, and deterministic behavior.
Performance
Designed for sub-200ms single calculations and secure uploads.
Popular calculators
Validated, deterministic tools with unit-aware inputs.
Basic
Dose & concentration
Mass, volume, and potency conversions with documented assumptions.
Yield & reconciliation
Track expected vs actual yields with clear loss accounting.
Dilution calculator
Prepare precise dilutions with unit-aware ratios and steps.
Equipment surface area
Calculate contact surface area for vessels, parts, and assemblies.
Stability basics
Estimate shelf-life and expiry using standard stability inputs.
OOS/OOT statistics
Investigate out-of-spec and out-of-trend results with context.
Upload batch calculations
Upload your Excel files for batch processing with row-level validation. Try it in the calculators!
About the author
Built by Liangliang Zhang, focused on practical, auditable tools for pharmaceutical teams.
Connect on LinkedIn
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