Skip to main content
Calcimator

Heat Index Calculator

Calculate the heat index (feels-like temperature) based on air temperature and humidity. Assess heat danger level.

Inputs

°F
%

Results

Heat Index

113.1°F

Heat Index45.1°C
Feels Like Increase18.1°F
Danger LevelDanger — heat cramps/exhaustion likely

Heat Index

113.1°F

How to Use This Calculator
  1. Start by filling in the input fields below. Results update instantly as you type, so you can experiment with different values to see how they affect the outcome.
  2. Temperature — Temperature in the selected unit. Accepts values from 50 °F to 140 °F (default: 95 °F).
  3. Relative Humidity — Relative humidity as a percentage. Accepts values from 0 % to 100 % (default: 60 %).
  4. Once all inputs are set, review your results in the Results panel. Here's what each output means:
  5. Heat Index — shown as a numeric value. This is the primary result of this calculator.
  6. Heat Index — shown as a numeric value.
  7. Feels Like Increase — shown as a numeric value.
  8. Danger Level — your calculated result.
  9. Explore the related calculators below if you need deeper analysis or want to approach this topic from a different angle.
Ad Placeholder

Related Calculators

Wind Chill Calculator

Calculate the wind chill temperature using the official NWS formula. Assess frostbite risk based on conditions.

Temperature Converter

Convert between Fahrenheit, Celsius, and Kelvin temperature scales instantly.

Dew Point Calculator

Calculate the dew point temperature from air temperature and relative humidity. Includes comfort level assessment and frost risk.

Ad Placeholder