Date & Time Calculators
Client-Side / Zero Latency
Time Calculator
Add, subtract, and convert hours, minutes, and seconds. Sum multiple time logs, calculate timesheet totals, and convert between decimal hours.
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Time Calculator — Add, Subtract & Sum Hours & Minutes
Tired of manual time math for payroll, billable client hours, video editing, or audio playlists? Our Time Calculator lets you add and subtract hours, minutes, and seconds effortlessly, convert to decimal hours (e.g. 7h 45m = 7.75 hrs), and sum multi-entry timesheets.
Key Features:
- Two-time math (Add or Subtract Time A and Time B).
- Multi-entry timesheet tally: sum up to 10 daily work logs at once.
- Automatic carryover (e.g., 45 mins + 30 mins = 1 hour 15 mins).
- Instant conversion between Clock Time (HH:MM:SS) and Decimal Hours (e.g. 8.25).
How to Use:
- Enter hours, minutes, and seconds for Time A and Time B.
- Choose to Add (+) or Subtract (-).
- Get the exact sum in standard HH:MM:SS format and decimal hours.
- Use the Multi-Row Timesheet mode to sum up an entire week of daily work logs.
Converting Time to Decimal Hours for Payroll
Payroll software requires decimal hours rather than minutes. To convert minutes to decimals manually, you divide minutes by 60 (e.g., 15 mins = 0.25 hrs, 30 mins = 0.5 hrs, 45 mins = 0.75 hrs). Our calculator handles this conversion in real-time.
Frequently Asked Questions:
Yes. It seamlessly handles running totals into hundreds of hours, making it ideal for tracking monthly freelance projects or long flight layovers.