IBU
IBU is a three-letter initialism that may refer to:
- Ibuprofen, sold by Par Pharmaceutical under the brand IBU
- Inshore Boat Unit, a Naval Coastal Warfare unit of the United States Navy
- International Biathlon Union
- International Bitterness Units
- International Boxing Union
- International Burch University
- Istanbul Bilgi University
- Shitennoji University, also known as International Buddhist University