Heat Index Calculator

Heat Index Calculator – Calculate the apparent temperature based on air temperature and humidity to assess heat stress risk.

Heat Index Calculator Heat Index Calculator

🌡️ Results
  • Heat Index: °C
  • (Apparent temperature / “feels like” temperature)
Other Calculators

Description

🌡️ Heat Index Calculator – Measure “Feels Like” Temperature

The Heat Index Calculator helps determine the apparent temperature, or how hot it feels to the human body, by combining air temperature and relative humidity. It is widely used in weather forecasting, health safety, and outdoor planning to assess heat stress risk.

📘 What It Calculates:

  • ✅ Heat index (apparent temperature) from air temperature and humidity

  • ✅ Risk levels of heat stress and heat-related illnesses

  • ✅ Guidance for safe outdoor activities in hot weather

  • ✅ Helps predict dehydration, sunstroke, and exhaustion risks

💡 Features:

  • Easy input: temperature (°C/°F) and relative humidity (%)

  • Provides safety warnings for extreme heat conditions

  • Useful for athletes, outdoor workers, and event planners

  • Based on National Weather Service (NWS) heat index formula

👤 Who Should Use This:

  • 📌 Meteorologists forecasting weather conditions

  • 📌 Outdoor workers and athletes preventing heat stroke

  • 📌 Health professionals monitoring vulnerable populations

  • 📌 Event planners ensuring safety during hot days

✅ Pro Tip:

When humidity is high, sweat does not evaporate effectively, making it feel hotter than the actual temperature.

🔗 Related Tools:

It is the apparent temperature that shows how hot it feels when relative humidity is considered with air temperature.

High humidity slows sweat evaporation, making the body feel hotter.

Air temperature and relative humidity.

High heat index increases the risk of dehydration, heat exhaustion, and heat stroke.