Hours Calculator

Calculate time difference, add/subtract hours, convert time units, total hours, and hours worked with step-by-step solutions.

Your Input

Format: HH:MM or HH:MM:SS

Select a calculation type and enter times or values to see results with step-by-step solutions and visualization.

Complete User Guide

What is Hours Calculator?

The Hours Calculator is a comprehensive tool for calculating time differences, adding or subtracting hours from times, converting between time units (hours, minutes, seconds, days), calculating total hours from multiple periods, and calculating hours worked with break time deductions. This calculator is essential for time tracking, scheduling, payroll, and time management.

How to Use This Calculator

  1. Select a calculation type from the dropdown (Time Difference, Add/Subtract Hours, Convert Time Units, Total Hours, or Hours Worked).
  2. Enter the required times and values in the appropriate format (HH:MM or HH:MM:SS).
  3. For time differences, check 'End time is next day' if the end time is on the following day.
  4. Click 'Calculate' to see the results.
  5. Review the detailed results, visualizations, and step-by-step solution.
  6. Click 'Reset' to clear inputs and results.

Calculation Types

Time Difference

Calculate the difference between two times. Supports same-day and next-day calculations. Returns hours, minutes, seconds, and days.

Add/Subtract Hours

Add or subtract hours from a given time. Automatically handles day overflow/underflow. Useful for scheduling and time planning.

Convert Time Units

Convert between hours, minutes, seconds, and days. Supports all common time unit conversions with precise calculations.

Total Hours

Calculate total hours from multiple time periods. Add multiple start/end time pairs and get the sum of all periods.

Hours Worked

Calculate hours worked with break time deduction. Enter start time, end time, and break minutes to get net hours worked. Perfect for time tracking and payroll.

Key Time Formulas

Time Difference:

Difference = End Time - Start Time

Add/Subtract Hours:

Result = Time ± Hours

Hours Worked:

Hours Worked = (End Time - Start Time) - Break Time

Time Unit Conversions:

1 hour = 60 minutes = 3600 seconds = 1/24 days

1 minute = 1/60 hours = 60 seconds

1 second = 1/3600 hours = 1/60 minutes

1 day = 24 hours = 1440 minutes = 86400 seconds

Time Format

Times can be entered in the following formats:

  • HH:MM (e.g., 09:30, 14:45)
  • HH:MM:SS (e.g., 09:30:00, 14:45:30)

The calculator uses 24-hour format (00:00 to 23:59).

Important Notes

  • Times must be in 24-hour format (00:00 to 23:59).
  • For time differences, if end time is before start time, check 'End time is next day' or the calculator will assume next day automatically.
  • Time differences are limited to 48 hours; break time must not exceed total time; total hours supports up to 50 periods.

Common Applications

  • Time tracking and timesheet calculations
  • Payroll and wage calculations
  • Project time management
  • Scheduling and appointment planning
  • Work shift calculations
  • Overtime and break time tracking
  • Time unit conversions for international standards

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