Hours Between Two Times

What Is the Hours Between Two Times Calculator?

This tool calculates the elapsed time between two clock times, shown in decimal hours rounded to two decimals (e.g. useful for timesheets) -- if the end time is earlier than the start time, it assumes the end time falls on the next day.

How to Use This Tool

Enter a start time and an end time. The elapsed hours appear instantly.

How the Difference Is Calculated

Each time you enter is converted to minutes after midnight. The tool subtracts the start from the end. If the result is zero or positive it is used as is; if it is negative, 24 hours are added, which is how it decides that the end time falls on the next day. The total minutes are then divided by 60 and displayed as decimal hours with two decimal places. This version of the tool shows the decimal figure only, for example 7.75 rather than 7 hours 45 minutes, so if you need hours and minutes, convert the decimal part yourself.

Worked Examples

All times are hypothetical.

• 9:00 to 17:30: 510 minutes, which is 8.50 hours.
• 22:00 to 06:00: the raw difference is negative, so 24 hours are added, giving 8.00 hours.
• 08:20 to 12:05: 225 minutes, or 3.75 hours.
• 14:00 to 14:00: exactly 0.00 hours. The tool does not treat identical times as a full 24 hours.

Converting Decimal Hours to Hours and Minutes

Take the whole number as hours, then multiply the decimal part by 60 to get minutes. For 3.75, the 0.75 becomes 45 minutes. Common conversions worth remembering: 0.25 is 15 minutes, 0.5 is 30 minutes, 0.75 is 45 minutes and 0.1 is 6 minutes. A value like 2.33 is about 2 hours and 20 minutes, since the display is rounded to two decimals.

Using the Tool for Timesheets

• Calculate each shift or task separately and add the decimal figures, which is simpler than adding hour-and-minute pairs.
• Subtract unpaid break time afterward. The tool measures the full span between the two clock times and knows nothing about breaks. A 9:00 to 17:30 day with a 30-minute unpaid lunch is 8.50 minus 0.50, or 8.00 paid hours.
• Check whether your employer or client rounds to the nearest quarter hour or tenth of an hour, and apply that rule to the exact figure after calculating.
• Keep the unrounded numbers for your own records if you need to reconcile a disagreement later.

Edge Cases and Common Mistakes

• The tool works on clock times only, not dates. It can handle at most one midnight crossing. A span longer than 24 hours, such as a two-day trip, cannot be represented, because a later time is read as the same day and an earlier time as the next day.
• Identical start and end times return zero, not 24 hours. If you truly mean a full day, enter 24 manually.
• Mixing up AM and PM in your input is the most frequent error. The field uses the time picker of your browser, which may show a 12-hour or 24-hour format depending on your device settings, so double check that the selection matches what you meant.
• Daylight saving transitions are not modeled. On the night clocks change, the real elapsed time of an overnight shift can be one hour more or less than this tool reports. For payroll on those nights, follow your employer's policy and the rules that apply where you work.

Other Uses

Besides timesheets, the tool helps with estimating flight or train durations given departure and arrival times in the same time zone, working out how long a study session lasted, or checking how many hours of sleep a bedtime and wake time provide. If the two times are in different time zones, convert one of them first so both are on the same clock. For pay or legal purposes such as overtime, consult your employer's policy or the relevant labor authority.

Frequently Asked Questions