How do I use this for timesheets?
If you worked 4 hours and 30 minutes, and then took a 45 minute break, simply enter 4 hrs 30 mins, select Subtract, and enter 45 mins. It will calculate your exact billable time.
Tool Categories
Free Time Calculator | 1ClickTools
Easily add or subtract hours, minutes, and seconds. Great for calculating total hours worked, payroll, or video runtimes. 100% free and instant.
Frequently Asked Questions
What happens if I subtract a larger time from a smaller time?
The calculator correctly computes the difference and adds a negative sign, indicating how much time you are 'short'.
Do I have to enter seconds?
No! You can leave any field blank and it will just count as zero.
How accurate is this time calculator tool?
All processing runs entirely in your browser using verified algorithms. Results are computed with full double-precision — no server-side rounding or data transmission occurs.
How does 1ClickTools ensure my privacy and file security?
Privacy is our highest priority. All computations, data parsing, and file conversions take place locally inside your web browser's client-side memory using modern JavaScript and HTML5 APIs. Your data is never uploaded, stored, or transmitted to any external remote server.