How to Calculate Hours Between Two Dates
Practical tips for hours between dates — private tools at timecalculating.com.
Subtract the earlier timestamp from the later one to get elapsed milliseconds, then divide by 3,600,000 for hours (or use our Time Between Dates tool for days, hours, and minutes automatically).
Overnight shifts: if clock-out is earlier than clock-in on the same calendar day, add 24 hours to the end time.
Daylight saving: browser timezone tools use the IANA database — during DST transitions, always double-check critical payroll calculations.