Date Calculator
The Date Calculator is a simple tool that will help you with date computations with its three (3) functionalities - add, subtract and get the date duration between two dates. You can add 1 year and 3 months
or you can subtract 120 days
from a starting date. You can also get the entire duration from January 1, 2022
to December 31, 2030
.
How to Use the Date Calculator
This Date Calculator
is really of great assistance especially if you're dealing with counting off days, months or years. Even getting the date duration between two dates is quite time-consuming counting them manually.
For instance, you want to get how many days or months are there between March 1, 2022
up to April 13, 2025
. Counting them from your calendar is really time consuming, but with this calculator it will just be a breeze and the results are accurate.
Another example, adding few days from a starting date is quite easy if it's just adding up 5 days or 7 days. However, if you are dealing with adding 140
days or subtracting 640
days, that's another story.
The calculator is built so that doing these three examples will be a lot easier and faster for you. You just need to select the right operation type and enter your inputs.
The calculator is grouped into three (3) parts, the first set is marked with ⚙️ Operation Type
where you can select the operation you want to perform (functionality). The second set is the main one where there's input fields and buttons. The third is the result area where it displays the outcome of the calculations.
Here's a step by step guide on how to use the Date Calculator
:

- Step 1
On the topmost part of the calculator, you can find the
⚙️ Operation Type
field set. It is where you need to choose from the operation options - add, subtract and duration between. If you want to add or subtract days, weeks, months and/or years, select theadd
orsubtract
radio button. In case you want to get the total days between two dates, choose theduration between
type. - Step 2
After you have chosen an operation type, the next thing to do is to fill the input fields. If you have selected the
Duration Between
type, you'll need to enter theStart Date
and theEnd Date
. On the other hand, if you have selected theAdd/Subtract
type, you need to enter theStart Date
as well as the set of input fields - years, months, weeks and days. You can leave the one's blank if it's not needed. For example, you only want to add15
days, just enter15
onDays
input. - Step 3
The final step is to click on the
Calculate
button to get your results. You can reset the filled input fields as well by just clicking on theClear
button.
Here's a quick video guide on the overall functionality of this tool.
⚙️ Date Calculator Components
To know more about the inputs and each part of the tool, here's a quick breakdown with brief descriptions:
⚙️ Operation Types
Currently, there are three main functionalities or operation types.
- Add - switches to an operation where you can add years, months, weeks and/or days from a specified
Start Date
. - Subtract - same available input fields for
Add
option but this time, it deducts those numbers. - Duration Between - computes the total duration between the
Start Date
and theEnd Date
.
Start and End Dates
The Start Date
marks as the base or beginning of the date computation you want to perform. This input field only accepts date format.
You can type it manually with a format of Month/Day/Year or you can just click the calendar icon 📅 on the right side of the field and set the date.
On the other hand, the End Date
signifies the end of the computation. It is only availble when you do the Duration Between
operation type.
Results
For the ➕ Add
and ➖ Subtract
operation types, the result is labeled with
"📅 Date" which displays the calculated date. Since the purpose of this operations is to pinpoint the exact date.
However, for the ⇢ Duration Between
operation type, you'll see quite a display of results. The boxes labeled with "Total" provides a sum of the duration based on a time unit. These includes total number of days, weeks, months and years. The keyword here is "total" which means the sum of duration if you convert it to these units.
In addition, for a more human-readable type of date duration format, the last box displays exactly that. It displays the entire duration from years, months down to days.
To expound it even more, below it is a quick paragraph-form result with elaborates these numbers and what they represent.