Accellerometers measure acceleration, both an object's 'motion acceleration' or the 'gravitational acceleration' exerted by the earth. Because gravitational acceleration does not change rapidly over time, accelerometers are often used to calibrate gyrocopes. Motion acceleration can be used to calculate an object's displacement and velocity. When an sensor is in freefall, its motion acceleration and gravitational acceleration cancel each other out to produce a reading of zero. Gravitational acceleration readings are often used to calculate slope gradients.

This component measures magnetic fields. In electronic compasses, magnetoresistive sensors are used instead of traditional magnetic needles. Instead they calculate orientation on the basis of the deviation in the motion of electrons caused by the Lorentz Force as projected over x, y and z axes. Magnetism is measured in units called 'Teslas' and 'Guass.' Aside from the earth's own magnetic field, our environments also contain many sources of magnetic disturbance, so in addition to correcting for tilting and shaking, electronic compasses also integrate data from other sensors to increase their accuracy, making them superior to traditional compasses.

A membrane-style barometer is one of the most common devices used to measure air pressure. It contains a thin membrane which forms a concave or convex shape when subject to pressure differences. Change in pressure can be derived by using a capacitor to measure the change in electrical resistance. Because air pressure decreases as altitude increases, calibrated barometric readings can be used to derive the altitude at the current position. Temperature sensor data can be used to further calibrate pressure readings, increasing their accuracy and greatly increasing devices' utility for different indoor and outdoor applications. Barometric pressure readings can also increase the speed and accuracy of GPS function for locations including beneath bridges or overpasses, or inside high-rise buildings. Garmin's first-ever dedicated diving smart watch, the Descent MK1, makes use of two different barometers to separately detect pressure differences in different areas, allowing it to cover any potential outdoor application and outperforming competing dive watches by a large margin.