Find the elapsed time between two clock times in hours and minutes, including overnight time spans.
Clock-in and clock-out math, unpaid breaks, decimal hours and weekly time-card totals.
Enter the requested values above and select Calculate. The result updates immediately on the page, so you can change one value and compare different scenarios without leaving the calculator.
9:00 AM to 5:30 PM is 8 hours 30 minutes.
Find elapsed time between a start time and end time, including overnight periods. It is designed for quick estimates and everyday problem solving. When a calculation affects a contract, tax filing, medical decision or other high-stakes situation, verify the result with the appropriate professional or authoritative source.
From 10:15 PM to midnight is 1 hour 45 minutes, and midnight to 6:45 AM adds 6 hours 45 minutes. Together the duration is 8 hours 30 minutes, or 8.5 decimal hours.
Use the overnight wrap when the ending clock time is earlier than the starting time.
The calculator assumes an interval under 24 hours and does not model time-zone changes or daylight-saving transitions.
Continue with: Work Hours Calculator · Hours Between Times Calculator
Find elapsed time between a start time and end time, including overnight periods.
Duration = end time − start time; if end is earlier than start, the calculation assumes the end time is on the following day.
Yes. ERICH Calculators is free to use and no account is required.
Use this tool for elapsed clock time. If you need to subtract a lunch break, use the Work Hours Calculator. If you need a weekly total, use the Time Card Calculator.
See how formulas, sources and limitations are handled across ERICH Calculators.