A hoist life calculating device which calculates a life of a hoist performing operations such as lifting and lowering, comprising: a load calculating unit configured to calculate a suspended load of the hoist; an operating time measuring unit configured to count an operating time for each load calculated by the load calculating unit; and a remaining lifetime calculating unit configured to calculate a loading rate from the operating time for each load measured by the operating time measuring unit, and calculate a remaining lifetime of the hoist from the obtained loading rate; characterized in that: the load calculating unit is configured to calculate the suspended load of the hoist from a current value of a control inverter of the hoist and the number of rotations of a motor; and the hoist life calculating device further comprises: an operation cycle measuring unit configured to count both of the number of lifting operation times and the number of lowering operation times of the hoist for each load calculated by the load calculating unit; and a loading time rate measuring unit configured to measure a loading time rate that is a ratio of an operating time and a pausing time from the operating time for each load measured by the operating time measuring unit. a load calculating unit configured to calculate a suspended load of the hoist; an operating time measuring unit configured to count an operating time for each load calculated by the load calculating unit; and a remaining lifetime calculating unit configured to calculate a loading rate from the operating time for each load measured by the operating time measuring unit, and calculate a remaining lifetime of the hoist from the obtained loading rate; characterized in that: the load calculating unit is configured to calculate the suspended load of the hoist from a current value of a control inverter of the hoist and the number of rotations of a motor; and the hoist life calculating device further comprises: an operation cycle measuring unit configured to count both of the number of lifting operation times and the number of lowering operation times of the hoist for each load calculated by the load calculating unit; and a loading time rate measuring unit configured to measure a loading time rate that is a ratio of an operating time and a pausing time from the operating time for each load measured by the operating time measuring unit. the load calculating unit is configured to calculate the suspended load of the hoist from a current value of a control inverter of the hoist and the number of rotations of a motor; and the hoist life calculating device further comprises: an operation cycle measuring unit configured to count both of the number of lifting operation times and the number of lowering operation times of the hoist for each load calculated by the load calculating unit; and a loading time rate measuring unit configured to measure a loading time rate that is a ratio of an operating time and a pausing time from the operating time for each load measured by the operating time measuring unit. an operation cycle measuring unit configured to count both of the number of lifting operation times and the number of lowering operation times of the hoist for each load calculated by the load calculating unit; and a loading time rate measuring unit configured to measure a loading time rate that is a ratio of an operating time and a pausing time from the operating time for each load measured by the operating time measuring unit.