The wet bulb temperature is the lowest temperature air can reach by evaporating water into it, and it is the single most important number for judging heat stress in humans. A wet bulb reading near 35 degrees Celsius is considered the theoretical survivability limit, because at that point sweat can no longer cool the body no matter how much you drink or rest. This calculator uses the Stull 2011 empirical formula, which estimates wet bulb temperature accurately from just the air temperature and the relative humidity at standard sea level pressure, avoiding the need for a physical sling psychrometer. Enter the temperature and the humidity, choose Celsius or Fahrenheit, and read the wet bulb temperature with a heat stress note. This is valuable for athletes, laborers, event planners and anyone tracking dangerous humid heat. All math runs locally in your browser for instant, private results.
The wet bulb temperature is the lowest temperature air can reach by evaporating water into it, and it is the single most important number for judging heat stress in humans. A wet bulb reading near 35 degrees Celsius is considered the theoretical survivability limit, because at that point sweat can no longer cool the body no matter how much you drink or rest.
Yes. Wet Bulb Temperature Calculator is completely free, with no sign-up and no usage limits.
Yes. Wet Bulb Temperature Calculator runs in any modern web browser. There is nothing to download or install.
Yes. Wet Bulb Temperature Calculator runs entirely on your device in your browser, so nothing you enter is uploaded to a server.