Date Time
Hours Calculator
Compute the number of hours between two date/times.
Free to use — no sign-up or login.
Result
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Enter a start and an end. The result is hours and minutes, and it adds whole days when the span is longer than a day. An end that is earlier than the start is still answered: the page reports the elapsed time the other way and says so.
To add a duration onto one start, use the Time Calculator. A look-back from the current minute is the Hours Ago Calculator.
Midnight is part of the span
22:00 on 13 November 2026 to 01:30 on 14 November 2026 is 3 hours, 30 minutes. The result is not the decimal 3.5, and it is not “1 hour” just because the clock hour went backward.
An earlier end is labeled
If you swap the two fields, the duration is the same length and the note says the end is earlier. Empty fields are rejected. The page does not invent a span from a blank clock.
Worked example: 22:00 to 01:30 the next day
From 13 November 2026 22:00 to 14 November 2026 01:30 the span is 3 hours, 30 minutes. Reversing the two times reports that same length and says the end is earlier.
\[ 3\,\mathrm{h}+30\,\mathrm{min} \]
Frequently asked questions
Why isn’t the answer 3.5?
The page shows 3 hours, 30 minutes so the half hour does not have to be decoded from a decimal.
What if the end is on the next day?
The date is part of each field. A later calendar date is included in the span.
What if I enter the later time first?
You still get the length, and a note says the end is earlier.
Does a blank end mean “now”?
No. Both fields are required.
Can I see this in days as well?
A span of 24 hours or more includes whole days in the same result line.
References
Assumptions and limitations
Both clocks are local values you type. The page does not convert time zones or fill a blank field with the current time.