⏱ī¸ Time Calculator

Add or subtract time durations, calculate time differences, and convert between time formats. Ideal for tracking hours.

➕ Add / Subtract Time

: :
: :
4:15:30

🕐 Calculate Duration (Time Difference)

:
:
8h 30m

Tool Features

  • Time Addition: Easily add hours, minutes, and seconds to any timestamp.
  • Time Subtraction: Calculate elapsed time by subtracting inputs.
  • Duration Calculator: Find the exact gap between two times (e.g., 9:00 to 17:00).
  • Intelligent: Automatically handles dates wrapping to the next day.

How It Works

This calculator performs modulus arithmetic on time units. It converts all inputs to seconds or minutes, performs the addition or subtraction, and then converts the result back into Hours:Minutes:Seconds format.

for time difference, we simply subtract the start timestamp from the end timestamp, accounting for day boundaries.

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Frequently Asked Questions

How do I calculate time duration? +
To calculate duration, subtract the start time from the end time. If the end time is on the next day, add 24 hours to the end time before subtracting.
How to add hours to a time? +
Add the hours to the current hour, minutes to minutes, and seconds to seconds. If minutes exceed 60, convert to hours. Our calculator handles this automatically.
Can I calculate work hours? +
Yes, use the 'Time Difference' mode. Enter your start time and end time to get the total hours and minutes worked.
Does it handle seconds? +
Yes, the Add/Subtract mode supports seconds precision. The Duration mode primarily focuses on Hours and Minutes for standard use cases.