The present invention relates to computerized methods and systems for automatically documenting fluid intake and output events for a patient. In one method, a fluid balance event is extracted, an impact value associated with the fluid balance event is received, and a database is populated with the fluid balance event and associated impact value. In another method, a clinical event is received and analyzed to determine whether the event has an impact on the patient's overall fluid balance. If the event is determined to have an impact on the fluid balance, the event is managed as a fluid balance event and an impact value is received for the event. A fluid balance is then updated for the patient using the received impact value.