Can the hours calculator subtract a lunch break?

Yes. Enter the unpaid break length in minutes and it will be deducted from the total.

Does it calculate overnight shifts?

Yes. If the end is earlier than the start, ZaynClock treats it as the following day. You can also select the overnight checkbox explicitly.

What are decimal hours?

Decimal hours express minutes as a fraction of an hour. For example, 7 hours 30 minutes equals 7.50 decimal hours.

Hours Calculator

Find the exact time between a start and end time, subtract breaks, and get decimal hours for timesheets.

Start timeEnd timeUnpaid break (minutes)

Shift ends the next day

Total after break

7 hr 30 min

Decimal hours

7.50

Total minutes

450

Before break

8 hr 0 min

Common schedules

Calculate work, class or project hours without manual subtraction

Time subtraction becomes error-prone when minutes cross an hour, a break must be deducted or a shift passes midnight. This calculator handles those cases instantly. It is useful for employees checking a shift, freelancers preparing a timesheet, students logging study time and teachers calculating class or tutoring hours.

Hours and minutes versus decimal hours

Standard time uses 60 minutes per hour, while many payroll and billing systems use decimal hours. Thirty minutes is 0.50 hours, 15 minutes is 0.25 and 45 minutes is 0.75. ZaynClock shows both formats so you can copy the one your school, office or timesheet requires.

Need to total an entire Monday-to-Sunday schedule? Use the weekly time-card calculator.