Emergency Made Simple
powered by DecarliONE

WBGT Heat Stress Calculator

Wet Bulb Globe Temperature estimated from live weather data. Check conditions before training, fieldwork, or travel — in sun or shade.

Sun assumes bright sunshine and light wind.

WBGT estimate
--
--

The gap: air temperature vs. what your body feels

--
Air temp
--
Wet bulb
--
WBGT

Activity guidance

    Precautions & hydration

      What this means physiologically

      Children

      Adults

      Older adults (65+)

      Estimates only, computed from current air temperature and relative humidity (Open-Meteo). Full sun: Australian Bureau of Meteorology WBGT approximation (assumes bright sun, light wind; ignores actual cloud and wind). Shade: 0.7·Tw + 0.3·Ta using the Stull (2011) wet-bulb formula. Risk bands follow the Japanese Ministry of the Environment heat-illness prevention guidance. Not a substitute for on-site WBGT measurement or your local occupational heat rules.

      Disclaimer: the values shown are estimates for planning and awareness, derived from public weather data. They must not replace a dedicated WBGT measurement device or official occupational heat-safety guidance.