Work/rest from WBGT
Heat-stress programmes often allocate work and rest in each hour from WBGT and metabolic workload (light / moderate / heavy). This tool applies simplified ACGIH-style screening bands.
WBGT Work / Rest Calculator
Heat · work/rest from WBGT
Suggest minutes of work vs rest per hour from WBGT and workload (simplified screening table).
Formula: Work/rest % from WBGT × workload screening table
Frequently asked questions
Replace a full heat assessment?
No — screening only. Acclimatisation, clothing, and radiant sources change limits.
Need WBGT first?
Yes. Use the WBGT calculator or a meter, then enter the value here.
Rest in cool area?
Rest should be in a cooler recovery area with fluids — not just standing still in the heat.
Unacclimatised workers?
Use more conservative bands or delay heavy work until acclimatised.
