Weather and Climate

  • Earthquake Energy Calculator (Magnitude to Joules to TNT)
    Convert earthquake moment magnitude to seismic energy in joules and equivalent tons of TNT, or go from energy back to magnitude. Universal Gutenberg-Richter relation.
  • Dry Adiabatic Lapse Rate Temperature Calculator
    Calculate how air temperature changes with altitude using the dry adiabatic lapse rate of 9.8 °C per 1000 m. Enter surface temperature and altitudes.
  • Absolute Humidity Calculator
    Calculate absolute humidity in g/m³ from temperature and relative humidity using the Magnus-based formula. Fast, free, and accurate.
  • Temperature Conversion Calculator
    Convert temperatures between Celsius, Fahrenheit and Kelvin instantly. Enter a value and unit to see all three scales with exact formulas.
  • Celsius to Fahrenheit Calculator
    Convert Celsius to Fahrenheit instantly. Enter any °C value and get the exact °F result using the standard °F = °C × 9/5 + 32 formula.

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