Calculation device

A calculation device for a work machine comprising a holding head including a holding tool configured to hold a lead component comprising a lead and a body and a moving device configured to move the holding head, the calculation device calculating a release position of the lead component held by the holding tool, when the work machine mounts the lead component on a board by inserting the lead of the lead component held by the holding tool into a hole formed on the board by operating the moving device, wherein the calculation device is configured to calculate, when a held component constituting the lead component held by the holding tool is mounted on the board, a height to the held component as a release height at which the held component is released by the holding tool, the height to the held component being the height allowing the lead to be inserted into the hole without interference of the body of the held component and a pre-loaded component already mounted on the board, the calculation being performed based on a dimension of the pre-loaded component, a dimension of the lead of the held component, and a dimension of the holding tool.