This date calculator lets you add, subtract or choose a period between dates. It shows you the number of days or the date depending on the option selection.
Also, you can enter any number of years, months, weeks or days when choosing add or subtract option.
For Duration Between, it is already selected; the result shows you the total number of days, weeks, months, and years.
1 day
There is 1 day from July 11, 2025 to July 12, 2025.
🌞Total Days
1 day
📅Total Weeks
0 weeks
📅Total Months
0 months
📅Total Years
0 years
Date Difference
1 day
Date Calculator- Overview:
There are 3 opttions, Add, Subtract, or Duration Between.
Duration Between: In this case, select a Start Date and an End Date. The
result will bein total days, weeks, months, and years.
For Add or Subtract options: For Add or Subtract options, select a Start Date and enter
the duration in Years, Months, Weeks, and Days to add or subtract.
Calculate: This is the Calculation button.
Clear: This is the Clear button to reset inputs to default.
Note: The date format will be YYYY-MM-DD, or use the date picker. To know more about date and time, see home page.
Calculation:
Here is the basic calculation:
For Add/Subtract:
New Date = Start Date ± (Years + Months + Weeks + Days)
1 Week = 7 Days
Final date is based on month lengths and leap years
Duration Between: Total Days = End Date - Start Date
Total Weeks = Total Days ÷ 7
Total Months and Years = It is based on calendar difference and month lengths
FAQs
How do I add days to a date using the Date Calculator?
To add days, simply choose Add option. You will find input option for year, month, week, and days to add.
So, enter only the number of days to add and the calculator will shows you the date.
Can I subtract one date from another to find the number of days between?
Yes, use the Between dates option, select two dates, and it will calculate the number of days. It also shows you the date and number of days, weeks, months and years.
What is the use of subtracting days from a date?
Subtracting days is a way to find the past date. For example, to find the date 30 days ago, simply subtract 30 days from today.