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

Every tool is built against a stated regulatory or consensus standard and shows its working.

The goal is straightforward: reduce the time practitioners spend rebuilding the same spreadsheets, and reduce the quiet errors that accumulate when those spreadsheets are copied between jobs.

How the tools are built

• Each calculator states the standards it implements and the formulas it uses.
• Where standards disagree (for example OSHA versus NIOSH exchange rates), the tool reports both rather than choosing silently.
• Outputs include the validity limits of the calculation, not just a number.
• Results can be exported for inclusion in reports.

What this is not

These tools do not replace professional judgement, formal dosimetry, accredited laboratory analysis, or jurisdiction-specific legal advice. They are calculation aids. Validate outputs against your measurements and your regulator before relying on them.

Contact

If a calculation appears wrong, a reference is out of date, or a tool would benefit from a feature, email info@exactuslabs.com.