Attention: NCEI will undergo maintenance on Saturday, Aug 1 (5:30 am ET to approximately 7:00 pm ET) Access to many web systems will be unavailable during this time.
Calculators and Conversion Tables
Weather and climate data are presented in various meteorological units. NCDC provides access to calculators and conversion tables to help people understand and interpret the data.
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.