TRACEABLE METHODS
Know what is behind the result.
Each resource has its own method, input requirements and limitations. Follow the references on the resource page for the source that applies to your calculation.
Source use
Where a recognised method is used, the page links regulator, public health or manufacturer material. A reference to a body does not mean that body has reviewed or endorsed this implementation. Plain arithmetic tools and assessor-input worksheets are labelled separately.
Regional and equipment limits
A US incident-rate method is not a worldwide reporting requirement. A GB noise action value is not a universal legal threshold. Manufacturer-specific fall or lifting inputs must fit the actual system. Always read the scope before entering values.
Resource method notes
- TRIR calculator ↗KPI calculator · US OSHA method
- WBGT calculator ↗Calculator · Measured sensor inputs
- DART rate calculator ↗KPI calculator · US OSHA method
- Noise exposure calculator ↗Calculator · GB · 8-hour reference
- Toolbox talk builder ↗Tool / template · Editable template
- NIOSH lifting calculator ↗Calculator · Origin RNLE worksheet
- Fire extinguisher quantity planner ↗Tool / template · Assessed coverage only
- Man-hours calculator ↗Calculator · Person-hours arithmetic
- Two-leg sling tension calculator ↗Calculator · Symmetric two-leg model
- Fall clearance worksheet ↗Tool / template · Equipment-specific inputs
- Man-days calculator ↗Calculator · Person-day arithmetic
- LTIFR calculator ↗KPI calculator · Lost-time cases · 1,000,000 h
- Accident frequency rate calculator ↗KPI calculator · Injury cases · 1,000,000 h
- Injury severity rate calculator ↗KPI calculator · Lost workdays · 1,000 h
- Chemical TWA calculator ↗Calculator · Single substance · 8 h
- Hand-arm vibration calculator ↗Calculator · GB · HAV A(8)
- Whole-body vibration calculator ↗Calculator · GB · Three-axis A(8)
- Ladder length calculator ↗Calculator · 4 up : 1 out · geometry
- Excavation slope calculator ↗Calculator · Symmetrical geometry only
- IP rating decoder ↗Tool / template · IP-code explanation
Checks and corrections
The beta includes worked-example and calculation checks. Professional and site-specific review is still required before operational reliance. To report a discrepancy, send a correction with the inputs, units, expected outcome and source.