Hours Calculator — Calculate Time Worked Between Two Times
The OnlineTimeZone hours calculator finds the total duration between any two times in hours and minutes. Enter your start time and end time and get an instant result. The calculator handles overnight shifts that cross midnight correctly — if your end time is earlier than your start time, it automatically adds 24 hours to give the correct total. Used by freelancers, contractors, nurses, factory workers, and anyone filling out a timesheet.
Frequently Asked Questions — Hours Calculator
Enter your shift start time (for example, 09:00) and your end time (for example, 17:30) and click Calculate. The result will show 8 hours and 30 minutes. The calculator supports 24-hour time format. For overnight shifts where your shift starts in the evening and ends the following morning, the calculator automatically handles the midnight crossover so you always get the correct total hours.
Yes, this is one of the most important features. If your end time is before your start time — for example, a night shift from 22:00 to 06:00 — the calculator detects this and adds 24 hours to the calculation, giving you the correct result of 8 hours. Many simpler time calculators produce incorrect negative results for overnight shifts; OnlineTimeZone handles this automatically.
Freelancers enter their start and end time for each work session to get the total hours worked. Multiply the result by your hourly rate to calculate your invoice amount. For example, if you worked from 10:30 to 16:45, the calculator shows 6 hours and 15 minutes (6.25 hours). At a rate of ₹2,000 per hour, your invoice would be ₹12,500. It is the fastest way to verify timesheet entries before billing clients.
The calculator displays results in hours and minutes format (e.g., 8h 30m). To convert to decimal hours for billing or payroll purposes, divide the minutes by 60 and add to the hours. So 8h 30m becomes 8 + (30/60) = 8.5 decimal hours. Alternatively, a quick mental shortcut: 15 minutes = 0.25, 30 minutes = 0.50, 45 minutes = 0.75 of an hour.
Yes. A common approach is to calculate your total shift duration, then separately calculate your break duration (e.g., a 45-minute lunch break), and subtract manually. For example, if you work 09:00–17:45 (8h 45m total) and take a 45-minute lunch, your actual paid hours are 8h 00m. Many users run two quick calculations — total shift and break duration — to get their net billable or payroll hours quickly.