NOVELTY - The method involves measuring a current value, voltage value and temperature of a battery, and correcting the current value based on the voltage value. A battery forward voltage capacity is determined from the measured current value, voltage value and temperature. A determination is made, whether current integration capacity has to be corrected based on the forward voltage capacity. The current integration capacity is corrected, and is converted into a remaining capacity when the correction is necessary.    USE - Method for estimating a remaining capacity of a battery i.e. high-voltage battery, that drives a driving motor in an electric vehicle i.e. hybrid vehicle and a fuel cell vehicle. Can also be used for a passenger automobile e.g. sports utility vehicle (SUV), bus, truck, commercial vehicle, watercraft such as boat and ship, and aircraft.    ADVANTAGE - The method enables determining calculation accuracy of the remaining capacity by integrating an error rate and determines whether to perform the correction, thus increasing the calculation accuracy of the remaining capacity. The method enables simplifying calculation logic by selectively performing the correction based on a correction determination result, and enables maintaining deviation between the capacity calculated by current integration and the capacity calculated based on the battery forward voltage within a predetermined range, thus maintaining high accuracy in performing capacity correction. The method eliminates a current measurement error that occurs during calculation of the battery forward voltage by precisely calculating the remaining capacity of the battery and correcting the measured current value based on the measured voltage value. The method eliminates the error caused by the calculation using the predetermined calculated forward voltage error rate and the current integration value error rate.    DESCRIPTION OF DRAWING(S) - The drawing shows a flowchart illustrating the steps involved in a method for calculating a remaining capacity of a battery.