Hours Calculator

Hours Calculator — Calculate Hours Between Two Times Online

The Hours Calculator is a free online tool that quickly tells you how many hours and minutes are between any two times. Whether you are computing timesheet hours for payroll, calculating shift durations for staff scheduling, tracking project work, planning travel itineraries, or measuring sleep duration, this tool gives precise results without manual arithmetic or paper calendars.

Why Hours Calculations Are Tricky

Time math sounds simple but quickly becomes confusing when intervals cross midnight, span days, or involve break deductions. Calculating that someone clocked in at 9:45 PM and out at 6:15 AM — minus a 30-minute unpaid lunch — can easily produce errors in your head or on a calculator. The Hours Calculator handles overnight shifts, daylight saving transitions, and break subtractions automatically, returning the answer in decimal hours (for invoicing) and hours-and-minutes format (for clarity).

How to Use the Calculator

Enter your start time and end time in 12-hour or 24-hour format. Optionally subtract a break length in minutes. The tool returns total time worked, decimal hours, and a verification breakdown. You can also chain multiple shifts, see the daily and weekly totals, and copy results for time-tracking spreadsheets.

Who Uses This Calculator?

HR teams, payroll specialists, freelancers tracking billable hours, gig workers verifying delivery shifts, project managers measuring sprint effort, students managing study time, and parents tracking activity duration all benefit from accurate hour calculations. It works on any device, is mobile-friendly, free forever, and requires no signup. Bookmark it for fast time math whenever you need it.

Tamer Baghdadi

CEO / Co-Founder