1B may refer to:
Science and technology[edit]
- Alpha-1B adrenergic receptor
- Arginine vasopressin receptor 1B
- Interferon beta-1b
- Melatonin receptor 1B
- The ASCII hexadecimal code for the escape character
- 1b as one billion
Sport[edit]
Transport[edit]
- Axle arrangement on steam locomotives corresponding to a 2-4-0 wheel arrangement
- GCR Class 1B, a class of British 2-6-4T steam locomotive
- National Highway 1B (India, old numbering)
See also[edit]
- B1 (disambiguation)
- Billion
- All pages with titles containing 1B
- All pages with titles containing 1-B