Time Calculator
Add or subtract time in hours, minutes, and seconds. Supports multiple time entries and displays total in a human-readable format.
Add a time entry
No entries yet. Add a time entry above.
Total Time
Time Calculation Guide
Enter hours, minutes, and seconds for each time period. Click "Add Entry" to add multiple time periods together. Results exceeding 24 hours are displayed as "X days HH:MM:SS". For subtraction, enter the larger time first then the smaller time to subtract.
About this Calculator
The Time Calculator is a free, easy-to-use tool for add, subtract, hours. Simply enter your values and get instant, accurate results — no signup, no ads, no tracking. All calculations run locally in your browser, so your data stays completely private.
Privacy Note: All calculations are performed locally in your browser. No data is ever sent to a server or third party.