Time Calculator
Add/subtract times, convert between time units, see all conversions at once
About This Tool
Time Calculator
Add, subtract, and calculate the difference between time values — with hours, minutes, and seconds.
Why Use This Tool?
- Calculate total hours worked across multiple shifts or time entries
- Find the time difference between two events or time zones
- Add or subtract hours and minutes for scheduling and planning
- Calculate overtime hours or break time deductions for payroll
- Used by HR teams, project managers, and freelancers tracking billable hours
Overview
Time calculations are deceptively tricky. Adding 3 hours 45 minutes to 5 hours 30 minutes, calculating how many hours you worked across multiple shifts, or finding the time difference between two timestamps requires converting between hours, minutes, and seconds — something prone to errors when done mentally. Our Time Calculator makes all time arithmetic fast and accurate. Add or subtract time values, calculate the difference between two clock times (accounting for overnight shifts that cross midnight), find total hours across multiple time entries, and convert between different time formats. This tool is especially valuable for HR and payroll professionals calculating employee work hours, freelancers tracking billable time across tasks, project managers measuring time spent on deliverables, and students preparing time management schedules.
How to Use
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1
Choose Calculation Mode
Select Add Times, Subtract Times, or Time Difference depending on what you need to calculate.
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2
Enter Time Values
Input your time values in hours, minutes, and seconds. For time difference, enter the start and end times.
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3
Handle Overnight Shifts
Enable "Crosses Midnight" if your end time is on the next day (e.g., 11:00 PM to 7:00 AM for night shifts).
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4
Calculate
Click Calculate to get your result in hours, minutes, and seconds, plus the decimal hours equivalent.
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5
Copy the Result
Click Copy to clipboard to use the result in a timesheet or invoice.