Heat Index Calculator
Calculate the heat index (feels like temperature) based on air temperature and humidity. Supports °C and °F.
Result
Heat Index Tips
What is Heat Index?
Heat index is the "feels like" temperature, combining air temperature and humidity. High heat index can be dangerous.
Formula
The heat index formula is valid for T ≥ 27°C (80°F) and humidity ≥ 40%.
Safety
Stay hydrated, avoid strenuous activity in high heat, and seek shade or air conditioning when possible.