Do I need to sign up?

No. The tool works without an account.

Are my data uploaded?

Compatible operations run locally in the browser.

Difference in milliseconds divided by 3,600,000. Uses local browser time.

If the end date is before the start, the result is negative (hours in the past).

Calculate the exact number of hours between two dates and times.

Hours between dates

8.00

Start date & timeEnd date & time

Difference in hours (can be negative)

Examples

09:00 to 17:00 same day → 8.00

22 Oct 09:00 to 23 Oct 09:00 → 24.00

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Recommended next step

After using Hours Between Dates Calculator, continue with Days Between Dates Calculator.

Tools selected to complete the same task.

4 steps

Tool guide

Practical information to understand the result and use this tool correctly.

Calculate the exact number of hours between two dates and times.

The tool runs directly in the browser for immediate results.

Do I need to sign up?: No. The tool works without an account.
Are my data uploaded?: Compatible operations run locally in the browser.
How is it calculated?: Difference in milliseconds divided by 3,600,000. Uses local browser time.
Negative result?: If the end date is before the start, the result is negative (hours in the past).