Time Calculator
Add and subtract hours, minutes and seconds, convert decimal hours to hh:mm, and total a weekly timesheet.
About Time Calculator
This time calculator adds and subtracts durations in hours, minutes and seconds. Enter times as hh:mm:ss or hh:mm, choose plus or minus, and add as many rows as you need to get a total. A converter turns decimal hours such as 7.75 into 7:45 and back.
The timesheet tab takes start time, end time and break for each day and gives weekly hours and overtime, including shifts that end after midnight. It is useful for employees, freelancers, payroll staff and anyone totalling hours worked. The calculator is free, needs no sign-up and runs in your browser.
How to use Time Calculator
- Durations: enter times as hh:mm:ss or hh:mm, choose + or −, and add rows.
- Converter: turn decimal hours (7.75) into 7:45 and back.
- Timesheet: enter start, end and break for each day to get weekly hours and overtime.
Frequently asked questions
How do I convert 7.75 hours to hours and minutes?
Multiply the decimal part by 60: 0.75 × 60 = 45, so 7.75 hours = 7 hours 45 minutes.
How is overtime calculated?
Hours above the weekly standard you enter are counted as overtime. Under the Factories Act, 1948 the limit is 48 hours a week and overtime is paid at twice the ordinary rate — check your own employment terms.
What if a shift ends after midnight?
If the end time is earlier than the start time, the shift is treated as crossing midnight.
How do I calculate hours between two times?
Enter the start and end times in the timesheet and the hours between them are shown, minus any break.
How do I add hours and minutes together?
Enter each duration as hh:mm on its own row with + selected, and the total is shown in hours and minutes.
How many hours are 8:30 am to 5:30 pm?
It is 9 hours, or 8 hours if you take a one-hour lunch break.
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