Calculators and Conversion Tables

Weather and climate data are presented in various meteorological units. NCEI provides access to calculators and conversion tables to help people understand and interpret the data.

• Meteorological Calculator
  NOAA's National Weather Service Meteorological Calculator web page provides calculations and conversions for temperatures, wind chill, relative humidity, wind speed, or heat index.
• Land Beaufort Scale
  The Land Beaufort Scale is a system for estimating wind speed based on observed conditions on land.
• Marine Beaufort Scale
  The Marine Beaufort Scale is a system for estimating wind speed based on observed conditions at sea.
• Snowfall to Meltwater Conversion Table
  The Snowfall to Meltwater Conversion Table is a guide for estimating the water equivalency of newly fallen snow for various temperature ranges.