Earth And Weather calculators
8 calculators Antipode Calculator Find the exact opposite point on Earth for any latitude and longitude. Get antipodal coordinates in decimal degrees and DMS, plus the distance through the globe.
Open Azimuth Calculator: Bearing from Coordinates, Back-Azimuth and Conversion Calculate the azimuth between two GPS coordinates. Get back-azimuth, compass bearing, quadrant notation, and great-circle distance with step-by-step working.
Open Earthquake Calculator Calculate earthquake energy in joules and TNT equivalents, compare two magnitudes, convert Richter amplitude to magnitude, and view the Mercalli Intensity level.
Open Latitude Longitude Distance Calculator Calculate the great-circle distance between any two GPS coordinates in kilometers, miles, and nautical miles. Get bearing, midpoint, and step-by-step haversine working.
Open Rain to Snow Calculator Convert rainfall to snowfall depth using the NWS temperature-based snow-to-liquid ratio. Reverse mode, metric/imperial units, custom ratio, and worked steps.
Open Rainfall Calculator Calculate rainfall volume and water weight from any catchment area. Choose surface type for a realistic runoff estimate. Metric and imperial units supported.
Open Sunbathing Calculator: Safe Sun Exposure Time by Skin Type Calculate your safe sunbathing time, burn risk, recommended SPF, and vitamin D production based on UV index, Fitzpatrick skin type, altitude, and ground reflection.
Open Wind Chill Calculator Calculate the wind chill feels-like temperature from air temperature and wind speed. Get frostbite risk, danger level, and the NWS formula. Metric or imperial.
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