There is provided an apparatus to weigh a patient comprising a patient transfer board configured to support a patient in a supine position comprising at least 8 transducers, each transducer being provided 300 mm or less from another transducer. The transducers are provided at three or more positions across the width of the patient transfer board; wherein more than 45% of the transducers are provided 100 mm or less from an outer boundary of the patient transfer board.