Our Story Affiliate Program Employment Environmental Policy FAQ's Media Requests E-mail or call us at 1-877-255-3700 Converting Weather Units Easily convert common meteorological units of measurement. Instructions: Make an entry for a single Unit. Click on the Convert button. The other Units will be calculated and displayed. Click on the Reset button to clear all Units. Temperature Celsius Fahrenheit Kelvin Tables | Equations | Learn Precipitation Centimeters Inches Millimeters Tables | Equations | Learn Wind Speed Kilometers per Hour Knots Meters per Second Miles per Hour Tables | Equations | Learn Barometric Pressure Atmospheres Inches of Mercury (32F) Kilopascals Millibars Millimeters of Mercury (32F) Tables | Equations | Learn