Calculating the difference between two dates and times in Excel in hours can be done quite easily using a simple formula. By subtracting the earlier date and time from the later date and time and multiplying by 24 (since there are 24 hours in a day), you can get the total hours between the two moments in time.

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## Step by Step Tutorial: Calculating the Difference in Hours

Before diving into the steps, it’s important to know that Excel stores dates and times as numbers. When you subtract one date and time from another, Excel will return the difference in days. To convert this to hours, you’ll need to multiply by 24.

### Step 1: Enter the Dates and Times

Enter the two dates and times into separate cells in Excel.

Make sure that the dates and times are entered in a format that Excel recognizes. This could be mm/dd/yyyy hh:mm or dd/mm/yyyy hh:mm, depending on your regional settings.

### Step 2: Subtract the Earlier Date and Time from the Later Date and Time

In a new cell, type the formula =([later date/time cell reference] – [earlier date/time cell reference]).

This will give you the difference between the two dates and times in days.

### Step 3: Multiply the Result by 24

To convert the difference from days to hours, simply multiply the result by 24.

You can do this by extending your formula to =(([later date/time cell reference] – [earlier date/time cell reference])*24).

After completing these steps, you’ll have the difference between the two dates and times expressed in hours.

## Tips for Calculating the Difference in Hours

- Ensure that the cells containing the dates and times are formatted correctly as date and time in Excel.
- If you want to include minutes in your calculation, you can multiply the difference by 24*60.
- You can also use the TEXT function in Excel to format your result to show the number of days, hours, and minutes.
- If you’re dealing with different time zones, make sure to account for the time difference in your calculation.
- If you only want to count working hours, you can use the NETWORKDAYS function in Excel.

## Frequently Asked Questions

### What if my result shows a negative number?

If your result is a negative number, it means that the earlier date and time is actually later than the later date and time. Double-check to make sure you’ve entered the dates and times correctly.

### How can I calculate the difference in business hours?

To calculate the difference in business hours, you can use the NETWORKDAYS function. This function accounts for weekends and can also accommodate holidays.

### Can I calculate the difference in hours and minutes?

Yes, to calculate the difference including minutes, multiply the difference by 24*60 and format the result appropriately.

### How do I deal with time zones?

If you’re working with different time zones, you’ll need to adjust the times to a common time zone before performing the calculation.

### Can I calculate the difference in seconds?

Absolutely, just multiply the difference by 24x60x60 to get the result in seconds.

## Summary

- Enter the dates and times into separate cells.
- Subtract the earlier date and time from the later date and time.
- Multiply the result by 24 to get the difference in hours.

## Conclusion

There you have it, a straightforward way to calculate the difference between two dates and times in Excel in hours. Whether you’re tracking the duration of an event, measuring response times, or calculating hours worked, this formula has got you covered. Remember to double-check your date and time formats and consider any time zones that may affect your calculation. With these tips in hand, you’re all set to tackle time differences like a pro. Keep on Excel-ing!

Matthew Burleigh has been writing tech tutorials since 2008. His writing has appeared on dozens of different websites and been read over 50 million times.

After receiving his Bachelor’s and Master’s degrees in Computer Science he spent several years working in IT management for small businesses. However, he now works full time writing content online and creating websites.

His main writing topics include iPhones, Microsoft Office, Google Apps, Android, and Photoshop, but he has also written about many other tech topics as well.