Exactus Labs

Precision tools for occupational health and safety.

Exactus Labs builds calculators and assessment tools for occupational/industrial health and hygiene professionals. Built to standard. Free to use.

Browse tools What this is
Tools

Four areas of practice.

Precision calculators and assessment tools built to stated regulatory and consensus standards. No proprietary models, no hidden assumptions.

Physical Agents
Noise, heat stress, ionising radiation, vibration, and ergonomics. Quantitative assessment against OSHA, ACGIH, NIOSH, and Australian standards.
6 tools available
Chemical Agents
Inhalation exposure assessment, OEL comparison across Safe Work Australia, ACGIH, OSHA, and NIOSH. Atmospheric hazard estimation and control banding.
3 tools available
Biological Agents
Bioaerosol exposure estimation, water system Legionella risk scoring, and biological risk group classification for laboratory and healthcare settings.
3 tools available
Analytics
Statistical tools for exposure assessment. SEG analysis with Bayesian and frequentist methods, AIHA risk band classification, and measurement uncertainty estimation.
3 tools available
Browse all tools →
Principles

Built for the work, not for show.

Three things every tool here commits to.

Standards-grounded
Calculations cite the regulatory or consensus source. Where standards disagree, the tool shows the disagreement rather than picking for you.
Transparent
Formulas and constants are shown in each tool. Nothing is hidden behind a proprietary engine.
Field-useful
Output is structured for documentation: exportable reports, clear verdicts, and the limits the calculation is valid within.