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Date Difference Calculator to Calculate Days Between Dates

Calculator Preferences
Date Difference Calculator

This calculator will instantly calculate the number of days between two dates, plus convert those number of days to their equivalent years, months, weeks, hours, minutes, and seconds. The calculator can be used to calculate elapsed time from a past date and to calculate time between a past or present date and a future date. Many cool uses!

Selected Data Record:

A Data Record is a set of calculator entries that are stored in your web browser's Local Storage. If a Data Record is currently selected in the "Data" tab, this line will list the name you gave to that data record. If no data record is selected, or you have no entries stored for this calculator, the line will display "None".

DataData recordData recordSelected data record: None
Starting date:

Starting date:

Select the month and day and enter the 4-digit year of the beginning date. Note that the starting year must be less than 4000.

Ending date:

Ending date:

Select the month and day and enter the 4-digit year of the ending date. Note that the ending year must be less than 4000, and the ending date must be later than the starting date.

# Days:Number of days:Number of days between dates:Number of days between dates:

Number of days between dates:

This is the number of days between dates entered in the top portion of the time between dates calculator. Note that the number of days between dates does not include the day of the ending date. Simply add one to the result to include it.

# Weeks:Number of weeks:Number of weeks between dates:Number of weeks between dates:

Number of weeks between dates:

This is the number of weeks between dates entered in the top portion of the calculator (days divided by 7).

# months:Number of months:Number of months between dates:Number of months between dates:

Number of months between dates:

This is the number of months between dates entered in the top portion of the calculator (days divided by average number of days in a month, 30.4375).

# years:Number of years:Number of years between dates:Number of years between dates:

Number of years between dates:

This is the number of years between the two dates entered in the top portion of the calculator (days divided by average number of days in a year, 365.25).

If you would like to save the current entries to the secure database, tap or click on the Data tab, select "New Data Record", give the data record a name, then tap or click the Save button. To save changes to previously saved entries, simply tap the Save button. Please select and "Clear" any data records you no longer need.

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Tip

Help and Tools

Help and Tools:

This section, which you can Unstick or Hide in the Calculator Preferences (just above the top of the calculator), contains the following tabs (content too long to fit within bordered frame can be scrolled up and down):

About: Click this tab for an introduction to the calculator.

Instructions: Click this tab for step-by-step instructions for using the calculator.

Terms: Click this tab for a list of the descriptions that are located within each popup help button (info icons).

PCalc: Click this tab for a handy "pocket" calculator you can use when you need to calculate an entry needed for the calculator.

Data: Click this tab to save a set of entries or a note in between visits. Entries and notes will be stored to your web browser's local storage (if supported by your browser of choice), meaning they can only be recalled with the same device and web browser you were using when you saved them. If you'd like to save entries and notes between devices you can do so by subscribing to the Ad-Free Member Version.

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Move the slider to left and right to adjust the calculator width. Note that the Help and Tools panel will be hidden when the calculator is too wide to fit both on the screen. Moving the slider to the left will bring the instructions and tools panel back into view.

Also note that some calculators will reformat to accommodate the screen size as you make the calculator wider or narrower. If the calculator is narrow, columns of entry rows will be converted to a vertical entry form, whereas a wider calculator will display columns of entry rows, and the entry fields will be smaller in size ... since they will not need to be "thumb friendly".