How do you track equipment calibration due dates?

Equipment calibration due dates are tracked the same way as any other scheduled inspection: record the equipment, its calibration interval (set by the manufacturer, the relevant standard, or your quality management system), the date of the last calibration, and the date the next one is due. Then set a reminder with enough lead time to book the calibration lab and ship the equipment if needed -- two to four weeks is typical for most test and measurement equipment.

The complication in practice is volume. A lab or production facility might have dozens or hundreds of instruments, each on its own 6-month, annual, or 2-year cycle. Managing this in a shared spreadsheet works until the first person leaves without handing it over properly. The reliable approach is a central register where each piece of equipment is a record with its own due date and owner -- so the reminder reaches the right person regardless of staff changes.