Abstract: Methods and systems are disclosed for defining physiological states using sweat-sensing devices. An output of sweat-sensing devices is defined by identifying a set of sweat sensor values. Each sweat sensor value of the set of sweat sensor values includes an electrical-signal value produced by a sensor. For each sweat sensor value of the set of sweat sensor values, the electrical-signal value of the sweat sensor value is translated into a voltage value thereby generating a translated sweat sensor value. Each translated sweat sensor value is calibrated by transforming, upon applying a hardware correction value to the translated sweat sensor value, the voltage value into a physiological value. The calibrated sweat sensor values are aggregated and the calibrated seat sensors values are then modified using received environmental inputs. An output is then generated based on the modified sweat sensor values.