Exactus Labs
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Tools
Calculators and assessment tools
Each tool implements a stated regulatory or consensus standard. Free to use. Registration required.
Physical Agents
Noise, heat, radiation, vibration, and ergonomics
Noise Exposure Calculator
Free
Dose, TWA, peak exposure, and hearing protector adequacy against OSHA, NIOSH, ACGIH, and Australian HWSA 2022.
Heat Stress Calculator
Free
WBGT against ACGIH TLV-H, Thermal Work Limit (Brake & Bates 2002), and NOAA Heat Index. Includes Liljegren solar estimation and ACGIH Table 3 screening.
NORM Radiation Dose Estimator
Free
Gamma dose rate, radioactive decay, and unit conversion for NORM-handling environments. Secular equilibrium chain support for Ra-226, Ra-228, Th-232, and more.
Vibration Calculator
Free
Hand-arm vibration (ISO 5349) and whole-body vibration (ISO 2631) exposure assessment. EU Physical Agents Directive action and limit values.
Non-Ionising Radiation Estimator
Free
UV and optical radiation exposure against ACGIH TLV-L and ICNIRP guidelines. EMF field strength assessment for workplace exposures.
Manual Handling Calculator
Free
Recommended weight limits and lifting index using the NIOSH Revised Lifting Equation (1994). Composite lifting index for multi-task assessments.
Chemical Agents
Inhalation exposure, OEL comparison, and atmospheric hazards
Chemical OEL Lookup
Free
Compare occupational exposure limits across 12 jurisdiction tables: ACGIH TLV, OSHA, NIOSH, EU IOELV, EU CMD, UK EH40, AU WEL, NZ WES, Singapore WSH, and more. Enter a measured value to check compliance. 687 substances.
Chemical Exposure Calculator
Free
Calculate 8-hour TWA from multiple exposure periods and compare against OELs from 12 jurisdictions. Extended shift adjustment using Brief & Scala, OSHA, Quebec/IRSST, and pharmacokinetic models.
Atmospheric Hazard Estimator
Free
LEL and UEL assessment for flammable gases and vapours. Ventilation requirement estimation for confined space and indoor scenarios.
Biological Agents
Bioaerosols, water systems, and containment classification
Bioaerosol Exposure Estimator
Free
Airborne biological hazard assessment for bacteria, fungi, and endotoxin against ACGIH TLVs and WHO guidance. Exposure zoning and respiratory protection selection.
Legionella Risk Estimator
Free
Water system risk scoring against AS/NZS 3666 and ASHRAE 188. Temperature, flow, deadleg, and system configuration inputs.
Biological Risk Classifier
Free
Risk group classification for biological agents per WHO Laboratory Biosafety Manual. Containment level mapping for laboratory and healthcare settings.
Analytics
Exposure assessment methods and statistical tools
Exposure Profiler
Free
Bayesian and frequentist SEG analysis. AIHA risk band classification, lognormal fitting, exceedance fractions, and PDF reporting.
Control Banding Tool
Free
Hazard band classification for chemical exposure control decisions where quantitative measurement data is unavailable or limited.
Measurement Uncertainty Estimator
Free
Combined measurement uncertainty analysis for occupational exposure assessments per ISO GUM framework. Sampling, analytical, and variability components.