Humidex: Heat Index Calc

Humidex is a complete offline calculator suite for temperature, humidity, dew point, and comfort-related environmental calculations — built for anyone who wants quick, reliable results without an internet connection, an account, or unnecessary permissions.

Every calculation runs directly on your device. No sign-up. No ads. No tracking. No data collection.

WHAT YOU CAN CALCULATE

- Dew Point — estimate dew point from temperature and relative humidity using the Magnus formula
- Humidex — calculate the Humidex comfort indicator from air temperature and dew point
- Relative Humidity — find relative humidity from temperature and dew point
- Heat Index — estimate the "feels like" apparent temperature
- Vapor Pressure — saturation and actual vapor pressure in hectopascals
- Absolute Humidity — water vapor mass per cubic meter of air
- Temperature Converter — convert instantly between Celsius, Fahrenheit, and Kelvin
- Humidity Tools — quick access to every humidity-related calculator in one place
- Air Comfort — a general environmental comfort assessment
- Comfort Level — a simplified, transparent comfort score with explanation

WHY HUMIDEX

✓ 100% offline — every result is calculated on your device, instantly
✓ No account, no login, no cloud sync required
✓ No ads, no analytics, no third-party tracking
✓ Minimal permissions — the app doesn't request internet access, location, camera, or any sensitive permission
✓ Clean, modern Material Design interface with light and dark themes
✓ Clear explanations with every result, including formula sources and known limitations

WHO IT'S FOR

Whether you're a student learning atmospheric science, someone curious about today's humidity conditions, or simply want a fast reference tool for temperature conversions, Humidex gives you accurate, well-documented calculations without the clutter of a full weather app.

A NOTE ON ACCURACY

Humidex uses recognized, published scientific approximations (including the Magnus formula and the NOAA/NWS heat index regression). Results are environmental estimates, not laboratory-grade measurements, and the app is not a medical device, diagnostic tool, or emergency warning system.

Your privacy matters. Humidex never asks for personal information, and nothing you enter ever leaves your device.