Weather & Environment
Calculate environmental metrics, dew point, heat index, and wind chill.
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All Weather & Environment tools
17 tools in this category
Heat Index Calculator
Calculate the heat index (feels-like temperature) based on air temperature and relative humidity or dew point. Uses the National Weather Service regression equation for accurate results.
Wind Chill Calculator
Calculate the wind chill temperature based on actual air temperature and wind speed using the standard wind chill formula.
Dew Point Calculator
Calculate dew point temperature, relative humidity, or air temperature. Free online dew point calculator with multiple temperature units.
Cloud Base Calculator
Estimate cloud base altitude from temperature and dewpoint. This free browser tool uses the standard meteorological formula to help pilots and sky watchers.
Relative Humidity Calculator
Calculate relative humidity, dewpoint temperature, actual vapor pressure, and saturated vapor pressure using the Magnus formula. Free online humidity calculator.
Snow Melt Calculator
Calculate snow melt depth, heat capacity, heat content, and heat storage change for meteorology and hydrology. Solve for any variable.
Earthquake Calculator
Convert earthquake magnitude to energy release in joules and compare to TNT, atomic bombs, and volcanic eruptions.
Rainfall Volume Calculator
Calculate rainwater volume collected from roof area, rainfall depth, and runoff coefficient for harvesting estimates.
Rain to Snow Calculator
Convert rainfall to snow depth with our free Rain to Snow Calculator. Enter liquid amount and temperature to get snow ratio estimates for winter storms.
Snowman Calculator
Estimate snow depth needed to build a snowman and the probability of perfect snowman conditions based on temperature and snowfall.
White Christmas Calculator
Estimate white Christmas probability from average December temperature and historical snow days.
Absolute Humidity Calculator
Convert relative humidity and temperature to absolute humidity in g/m³ using vapor pressure and ideal gas law.
Altitude Temperature Calculator
Calculate air temperature at altitude using the international standard atmosphere lapse rate.
Daylight Calculator
Calculate hours of daylight from latitude and date using solar geometry. Find sunrise-to-sunset duration for any location and day of year.
Evaporation Rate Calculator
Estimate liquid evaporation rate from surface area, vapor pressure, wind speed, and humidity.
Sun Angle Calculator
Calculate solar elevation and azimuth angles for any location, date, and time using solar geometry.
Sunrise Sunset
Find local sunrise, sunset, and daylight length for any latitude, longitude, and date using solar geometry in your browser.
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