Time Calculator

Enter the days, hours, minutes, and seconds for each time value, select 'Add (+)', and the calculator will sum them for you. The result is automatically normalized — for example, 75 minutes becomes 1 hour and 15 minutes. See also our calculate Total Time (hh:mm), Total Hours (Decimal) & Total Minutes — Hours.

If the second time value is larger than the first, the result will be negative, meaning the subtraction produces a time deficit. The calculator will show a negative result. Make sure to enter the larger time as Time 1 if you want a positive result.

Yes — any field left blank or set to 0 is treated as zero for that unit. For example, if you only enter hours and minutes, days and seconds default to 0.

The total result in seconds is divided by 3600 for total hours, by 60 for total minutes, and shown directly for total seconds. These conversions help you express the same duration in a single unit. You might also find our Gravel Calculator useful.

This calculator adds or subtracts two time durations (e.g., 1 hour 30 min + 2 hours 45 min). A Time Duration Calculator, by contrast, finds the elapsed time between two specific clock times or dates (e.g., from 9:00 AM to 5:30 PM).

After computing the total in seconds, the result is broken back down into days, hours, minutes, and seconds using standard conversions: 60 seconds per minute, 60 minutes per hour, and 24 hours per day. This ensures the output is always in the most readable form.

This calculator works well for adding up time durations, but for payroll you typically need to calculate the time between a start clock time and an end clock time and deduct breaks. A dedicated hours or timecard calculator is better suited for that purpose.

You can enter up to 9,999 days for each time value, with hours up to 23, and minutes and seconds up to 59. For very large durations, the total hours and total seconds outputs give you a convenient single-unit summary.