Time Duration Calculator

Calculate duration between times, add/subtract duration, convert time units, and find elapsed time with step-by-step solutions.

Your Input

Format: HH:MM or HH:MM:SS (e.g., 09:00 or 09:00:00)

Can be next day (e.g., 23:00 to 02:00)

Select a calculation type, enter your times or duration, then click Calculate to see results with step-by-step solution and visualization.

Πλήρης Οδηγός χρήσης

What is Time Duration?

Time duration is the amount of time that passes between two points in time, or the length of time something takes. This calculator finds duration between two clock times, adds or subtracts duration from a time, converts between time units, and computes end time from a start time and elapsed duration.

Time format: HH:MM or HH:MM:SS (24-hour)

Time Format

HH:MM: Hours:Minutes (e.g., 14:30)

HH:MM:SS: Hours:Minutes:Seconds (e.g., 14:30:45)

Use 24-hour format (0-23 hours).

Τύποι Υπολογισμού

Duration Between Times

Enter start and end time; duration can cross midnight.

Add/Subtract Duration

Add or subtract hours, minutes, seconds, or days from a given time.

Convert Duration Units

Convert between seconds, minutes, hours, days, weeks, months, and years.

Calculate Elapsed Time

From a start time and elapsed duration, get the end time.

Πώς να χρησιμοποιήσετε αυτήν την αριθμομηχανή

  1. Select calculation type from the dropdown.
  2. Enter time values (HH:MM or HH:MM:SS) or duration and units in the form.
  3. Click Calculate to see the result, detail cards, visualization (when available), and step-by-step solution.
  4. Click Reset to clear inputs and results.

Σημαντικές Σημειώσεις

  • Use 24-hour format (0-23 hours). Duration can cross midnight.
  • Subtracting duration may wrap to the previous day. All calculations use seconds internally.
  • Months and years are approximate (30 and 365 days).

📤 Share This Tool