0°
# 0°

0° or 0 degrees may refer to:

* Longitude: the prime meridian on any planet or moon
   * For most of the 20th century on Earth, the prime meridian (Greenwich)
   * IERS Reference Meridian, the modern reference meridian for time and global navigation on Earth
* Latitude: the equator
* freezing point of water (Celsius)
* absolute zero, the lower limit of the thermodynamic temperature scale (Kelvins)
* 0 degrees Fahrenheit, approximately -17.78 degrees Celsius
