A method and apparatus are described for calibrating bonded wire resistance strain gauges in the frequency range from 2 to 20 kc. The gauges are mounted on an electromagnetically excited longitudinally resonant bar whose amplitude of vibration is measured by an interferometer. Results are given for one type of bonded wire strain gauges. Factors affecting the frequency sensitivity relationship of bonded wire strain gauges are discussed. Application for calibration of accelerometers is discussed.