Time Duration Calculator
Elapsed time between two times.
Enter your values in the interactive calculator to see an instant result. Calculations run in your browser, without an account.
Results are estimates for educational use; confirm important decisions with appropriate experts.
Formula • Worked example • Interpretation
Elapsed hours and minutes between clock times
Find the duration between two clock readings for a shift, activity or appointment.
Calculation method
Worked example
From 9:30 AM to 11:00 AM is 1 hour and 30 minutes, or 90 minutes.
What your result means
For shifts that cross midnight, ensure the calculator’s overnight behavior matches the dates you intend to count.
Tips for better calculations
For a date-to-date interval, use Date Difference instead; for working days, use Business Days.
Assumptions and limitations
Time zone changes, daylight saving, breaks, and multi-day intervals are not fully captured by a simple clock-time form.
SiCalcs tools provide estimates and educational calculations; they do not replace professional financial, medical, tax, or legal advice.