FCR may stand for the following:
- FCR 2001 Duisburg, a German women's football club from Duisburg
- Fc receptor, a protein receptor found on cells of the immune system
- Feed conversion ratio, how efficient an animal is at converting food into body mass
- Field Change Request, In construction, technical drawing with changes
- Fire-control radar, in the military, a system for providing information on how to direct weapon fire.
- First call resolution, a measurement of customer service in the contact center industry, for instance in a service level agreement
- Flat-Coated Retriever a breed of gundog
- Flexor carpi radialis muscle, a muscle in the forearm
- Flying Carpet (airline) ICAO code
- Folin-Ciocalteu reagent, a reagent to detect polyphenols
- Forwarder's Cargo Receipt. The Forwarder's Cargo Receipt provides validation that a vendor has delivered the specified cargo and all related documents to the designated receiver. It also enables the vendor to collect payment for the cargo from the clients bank as defined in the Letter of Credit (L/C).
- Frontier Crimes Regulations, a set of Pakistani laws applying to Pashtun-inhabited tribal areas
- Fulton County Railway, a company operating on about 55 miles of track owned by CSX Transportation in Georgia
- Functional Residual Capacity, in medicine, the amount of air in the lungs after passive expiration.