Time Duration Calculator
Calculate the duration between two times in hours and minutes, including overnight shifts.
Enter a start and end time to get the exact duration in hours and minutes, plus the total in minutes and decimal hours. If the end time is earlier than the start, the tool assumes the period runs past midnight into the next day — perfect for night shifts, on-call windows and time sheets.
It works entirely in your browser, so it is instant and private, with no sign-up.
Frequently asked questions
How do I calculate hours between two times?
Enter the start and end time; the tool returns the difference in hours and minutes, plus total minutes and decimal hours.
Does it handle overnight shifts?
Yes. If the end time is before the start time, it assumes the shift crosses midnight into the next day.
What is decimal hours used for?
Payroll and billing often use decimal hours (e.g. 1.5 instead of 1h 30m). The tool shows both formats.
Can it add a lunch break?
Calculate the full shift, then subtract your break separately, or run two segments and add the results.