Enter temperature and relative humidity to calculate wet bulb temperature, dew point, and heat stress warning level. Essential for outdoor work and exercise safety. No signup, data stays local.
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FAQ
What is the difference between wet bulb and regular temperature?
Regular temperature (dry bulb) is what a thermometer reads. Wet bulb temperature accounts for evaporative cooling and reflects the body's ability to cool through sweating — a key metric for heat stress.
What wet bulb temperature is dangerous?
Below 26°C (79°F): Safe. 26-30°C: Caution, reduce strenuous activity. 30-35°C: Dangerous, stop outdoor exercise. Above 35°C (95°F): Extreme danger, potentially fatal.
How accurate is this formula?
This tool uses the Stull formula, accurate to within ±0.5°C for typical temperature and humidity ranges. For professional meteorological use, consult specialized instruments.
Is my data safe?
Completely safe. This is a pure client-side tool — all calculations happen in your browser and never leave your device.