Simple tools. Clear time.
Hours & time sum calculator
Add duration entries for tasks, sessions or completed work periods. See the total as time and decimal hours.
1.5 hours = 1 hour 30 minutes. No signup. Calculations stay in this page; this build has no input storage or analytics.
Decimal hours are not hours and minutes
1.5 hours means 1 hour plus half an hour: 1 hour 30 minutes. It does not mean 1 hour 50 minutes. To convert, divide total seconds by 3,600. The time display stays exact; decimal hours are rounded to four decimal places.
What can I total here?
Add up to 100 duration entries, such as completed work periods, workout sessions or media clips. This tool does not calculate wages or overtime entitlements.
How do I add clock-in and clock-out times?
First use the time duration calculator for each period, including any break. Then enter those duration results here. Do not enter a time of day as though it were a duration.