How to use the time to decimal calculator
This time to decimal calculator converts hours, minutes, and seconds into decimal hours and decimal minutes. Enter the hours (0 or more), minutes (0–59), and seconds (0–59), then click "Convert to decimal" to see the result. You can enter only hours, or hours and minutes, or all three; leave unused fields at 0. The tool shows both decimal hours (e.g., 8.5 for 8 hours 30 minutes) and decimal minutes (e.g., 510 for the same duration), so you can use whichever format your payroll or billing system expects.
Converting time to decimal is useful for payroll, billing, and time tracking. Many pay systems require decimal hours: 8 hours 30 minutes becomes 8.5 hours, so you multiply 8.5 by the hourly rate to get gross pay. Billing clients is simpler when you use decimal billable hours. Time tracking and project tools often store or report time in decimal form. Working with decimals also makes spreadsheets and formulas easier than using hours:minutes:seconds. Minutes convert to decimal hours by dividing by 60 (30 min = 0.5 h, 15 min = 0.25 h); seconds by dividing by 3600.
The calculator runs entirely in your browser. There is no sign-up, no download, and no delay. It is designed to be mobile-friendly: the two-column layout stacks on small screens, and the inputs are easy to use. Results are shown with four decimal places for hours and two for minutes, so you get precise values for payroll or billing. Some employers round to the nearest 0.25 hours (15 minutes) or 0.1 hours (6 minutes); you can round the result as needed for your policy.
Bookmark this page for quick access whenever you need to convert time to decimal. This free time to decimal calculator provides fast, accurate results on any device.