Hours CalculatorCalculate the hours and minutes between two times

Find the hours and minutes between two times, including overnight spans, minus breaks. Add several spans for split shifts and get the total in hours:minutes, decimal hours and pay.

  • Overnight spans handled
  • Breaks subtracted
  • Multiple spans
  • 24-hour dial
Manzoor Ahmad
Designed, developed & tested by Manzoor Ahmad, calculator developer
Last reviewed
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Hours calculator

Total time

0:00

0.00decimal hours
0total minutes
—pay
0time spans

How do you calculate hours between two times?

Convert both times to minutes after midnight, subtract the start from the end, and add 24 hours if the end is earlier, which means the span crossed midnight. Then subtract any unpaid break and convert back. From 9:15 AM to 5:40 PM is 8 hours 25 minutes, or 8.42 decimal hours. A night shift from 10:00 PM to 6:00 AM is 8 hours.

Hours formula with a worked example

Minutes = (End − Start) in minutes (+1,440 if End ≤ Start)Net = Minutes − Break minutesDecimal = Net ÷ 60 · Pay = Decimal × Hourly rate

Example: 9:15 AM = 555 minutes and 5:40 PM = 1,060 minutes. 1,060 − 555 = 505 minutes = 8 h 25 min. 505 ÷ 60 = 8.42 hours. At $18.50/h that is $155.71.

Common shift lengths

ShiftHours (decimal)After a 30-min unpaid lunch
9:00 AM – 5:00 PM8:00 (8.00)7:30 (7.50)
8:00 AM – 5:00 PM9:00 (9.00)8:30 (8.50)
8:30 AM – 5:00 PM8:30 (8.50)8:00 (8.00)
7:00 AM – 3:30 PM8:30 (8.50)8:00 (8.00)
6:00 AM – 2:00 PM8:00 (8.00)7:30 (7.50)
7:00 AM – 7:00 PM12:00 (12.00)11:30 (11.50)
3:00 PM – 11:00 PM8:00 (8.00)7:30 (7.50)
10:00 PM – 6:00 AM8:00 (8.00)7:30 (7.50)
7:00 PM – 7:00 AM12:00 (12.00)11:30 (11.50)

Related calculators

Working with hours? These tools take the next step:

Time Card CalculatorTotal a full week of shifts with lunch breaks, overtime and pay.Open Time Card Calculator →Time to Decimal CalculatorConvert hours:minutes to decimal hours for payroll, or back again.Open Time to Decimal Calculator →Time CalculatorAdd or subtract durations, or find the clock time after a duration.Open Time Calculator →Time Zone ConverterWorking across time zones? Convert the start and end times first.Open Time Zone Converter →

More Time & Work Hours calculators in this cluster:

Manzoor Ahmad

Manzoor Ahmad

Calculator Developer · Founder of DexoCalc

I’m a pharmacist turned web developer with 13+ years of experience building web tools. I built this quick-span tool as a companion to our time card calculator, for the times you need one answer fast, overnight shifts and split shifts included.

Published · Last reviewed · Author profile · Report an issue

Hours calculator: frequently asked questions

8 hours, from 9:00 AM to 5:00 PM. With a 30-minute unpaid lunch it’s 7.5 hours.

Subtract the start time from the end time (add 24 hours if the shift crosses midnight), then subtract unpaid breaks. Enter the times above to see hours:minutes and decimal hours.

12 hours, a typical healthcare or security shift.

If the end time is earlier than the start time, it assumes the span crosses midnight and adds 24 hours. 10 PM to 6 AM is 8 hours.

Yes. Add up to six spans, such as a split shift or several work sessions, and the total updates instantly. For a full weekly timesheet with overtime, use the time card calculator.

Divide the minutes by 60: 25 minutes = 0.42 hours, so 8:25 = 8.42 hours. The time to decimal calculator has a full conversion chart.

Sources & references

  1. Fact Sheet #22: Hours Worked Under the FLSA, US Department of Labor
  2. Time and Frequency Division, National Institute of Standards and Technology

Pay is a simple estimate (hours × rate) and excludes overtime premiums, taxes and deductions.

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