90 calendar days calculator. Calculating the number of days from a date

If on an Excel sheet you work not only with numbers, graphs, pictures, but also with dates, then you have probably encountered a situation where you needed to calculate the difference between them. For example, you need to determine the number of days or months for a certain period of time, or calculate the age of a person so that the result is in days, months and years, or maybe you need to calculate exactly working days.

There is already an article about calculating the difference in Excel on the site, and in it I touched on dates a little. But now let's look at this issue in more detail and figure out how to calculate the number of days between two dates in a simple way or using the RAZNDAT() function, and how to determine the number of working days.

Method 1: Subtraction

Let's start with the simplest thing - subtract the second from one date, and get the value we need. Before doing this, make sure that the format of the cells in which the numbers are written is “Date”.

If you haven’t filled them in yet, then select the range you want to work with and click on the small arrow next to the name of the “Number” group.

In the window that opens on the left, select the format that suits us, and then in the main area, decide on the type: 03/14/12, 14 Mar 12 or another. Click "OK".

In those cells for which you just changed the format, enter data. I filled out A1 and B1. Now you need to select any cell (D1) in which the general data format is set, otherwise the calculations will be incorrect. Put “=” in it and press first the late (B1) date, then the early (A1). To calculate the number of days between them, press “Enter”.

Method 2: Using a function

To do this, select the cell in which the result will be (B3), and make sure that the general format is selected for it.

To calculate days we will use the AZNDAT() function. It includes three arguments: start and end date, one. Unit is what we want to get the result in. Substituted here:

“d” – number of days;
“m” – number of full months;
“y” – number of full years;
“md” – will count days without taking into account months and years;
“yd” – counting days without taking into account only years;
“ym” – will count the months without taking into account the year.

We put an equal sign in B3, write RAZNDAT and open the bracket. Then select the early date (A1), then the latest date (B1), put a suitable unit in quotes and close the bracket. Place ";" between all arguments. . To calculate, press "Enter".

I came up with this formula:

RAZNDAT(A1;B1;"d")

Choosing “d” as the unit, I got the result - 111.

If you change this value, for example, to “md”, then the formula will calculate the difference between 5 and 24 without taking into account months and years.

By changing this argument in this way, it will be possible to derive the exact age of the person. In one cell there will be years “y”, the second month “ym”, the third day “md”

Method 3: counting working days

For example, let's take this sign. In column A we have the beginning of the month or the starting date of the countdown, in B we have the end of the month or countdown. This function counts working days without taking into account Saturday and Sunday, but there are also holidays in the months, so we will fill column C with the corresponding dates.

NETWORKDAYS(A5;B5;C5)

As arguments we indicate the start date (A5), then the end date (B5). The last argument is holidays (C5). We separate them with ";" .

By pressing “Enter” the result will appear, in the example cell D5 – 21 days.

Now consider if there are several holidays in a month. For example, in January there is New Year and Christmas. Select cell (D6) and put equal in it. Then click on the letter “f” in the formula bar. A window will open "Insert a function". In the Category field, select "Complete alphabetical list" and find the function you need in the list. Click "OK".

Next you need to select the function arguments. In “Start_date” we select the initial value (A6), in “End_date” we select the final value (B6). In the last field, enter the dates of holidays in parentheses () and quotation marks "". Then click "OK".

As a result, we will get the following function and the value will be calculated without taking into account weekends and specified holidays:

NETWORKDAYS(A6;B6;("01/01/17";"01/07/17"))

To avoid entering holidays manually, you can specify a specific range in the corresponding field. Mine is C6:C7.

The working days will be counted, and the function will look like:

NETWORKDAYS(A6;B6;C6:C7)

Now let's do the calculations for the last month. Enter the function and fill in its arguments:

NETWORKDAYS(A8;B8;C8)

In February there were 19 working days.

I wrote a separate article about other date and time functions in Excel, and you can read it by following the link.

Date and time in Excel are numbers formatted in a special way. The date is the integer part of the number, and the time (hours and minutes) is the fractional part.

By default, the number 1 corresponds to the date January 01, 1900. That is, each date is the number of days that have passed since 01/01/1900. In this lesson we will look at dates in detail, and in the following lessons we will look at times.

How to count days between dates in Excel?

Since the date is a number, it means that mathematical calculations and computational operations can be carried out with it. Calculating the number of days between two Excel dates is not much of a problem. For a visual example, let’s first perform the addition and then the subtraction of dates. For this:

1. On a blank sheet of paper, in cell A1, enter the current date by pressing CTRL+;.
2. In cell A2, enter the interim period in days, for example 127.
3. In cell A3, enter the formula: =A1+A2.

Please note that the “Date” format was automatically assigned to cell A3. It’s not hard to guess; to calculate the difference in dates in Excel, you need to subtract the oldest date from the newest date. In cell B1, enter the formula: =A3-A1. Accordingly, we get the number of days between these two dates.



Calculating age by date of birth in Excel

Now we will learn how to calculate age by date of birth:

1. On a new sheet in cells A1:A3, enter the dates: 04/18/1985; 08/17/1977; 12/08/1992
2. In cells B1:B3, enter the current date.
3. Now you need to use the function to convert the number of days to the number of years. To do this, manually enter the following value in the range C1:C3: =RADIT(A1;B1,"y").

Thus, using the function allowed us to accurately calculate age by date of birth in Excel.

Attention! To convert days into years, the formula: =(B1-A1)/365 is not enough. Moreover, even if we know that 1 day = 0.0027397260273973 years, then the formula: = (B1-A1)*0.0027397260273973 will also not give an accurate result.

Days into years are most accurately converted by the function: = RAZNDAT(). English version =DATEDIF(). You won't find it in the Function Wizard list (SHIFT+F3). But if you just enter it into the formula bar, it will work.

The RAZNDAT function supports several parameters:

Let's illustrate an example of using several parameters:

Attention! To ensure that the function:=ADDAT() works without errors, make sure that the start date is older than the end date.

Entering a date in an Excel cell

The purpose of this lesson is to provide an example of mathematical operations with dates. Also, we will make sure that for Excel the date data type is a number.

Fill in the table with dates as shown in the figure:

Different ways to enter dates. Column A is the input method, and column B is the display result.

Please note that in the default cell format "General", dates as well as numbers are aligned to the right, and text is aligned to the left. The value in cell B4 is recognized by the program as text.

In cell B7, Excel itself assigned the current year (now 2015) as the default. This is visible when displaying the contents of cells in the formula bar. Notice how the value was initially entered into A7.

Excel date calculation

On a blank sheet of paper, enter 01/01/1900 in cells A1:B1, and enter 01/01/1901 in cells A2:B2. Now change the cell format to “numeric” in the selected range B1:B2. To do this, you can press the key combination CTRL+SHIFT+1.

B1 now contains the number 1, and B2 - 367. That is, one leap year (366 days) and 1 day have passed.

You can set how dates are displayed using the Format Cells dialog box. To call it, press: CTRL+1. On the “Number” tab, select “Number formats” - “Date” from the list. The Type section displays the most popular formats for displaying dates.

Perhaps you and your girlfriend/boyfriend will decide to celebrate every anniversary since you met. These can be all days that are multiples of 100 - 100 days. Or 1000 days from the wedding day! Or 1000 days since the birth of my son!!!

Sometimes it is difficult to count how many days or months have passed from a certain date to today.
If you superimpose, say, 180 days on the calendar, you get 5 and a half months, and not six at all, as follows from mathematical calculations.

Imagine that you took out a loan from a bank for 360 days and you need to know the exact repayment date of the loan.
Perhaps this calculation will help you calculate the number of days until your vacation.

Or perhaps you and your girlfriend will decide to celebrate every anniversary since you met.
These can be all days that are multiples of 100 - 100 days, 200 days, 300 days... and a round date - 1000 days from the date of acquaintance.
Or 1000 days from the wedding day!
Or 1000 days since the birth of my son!!!

Fantasize and your life will become more interesting and varied.

This way you can please not only girls, but also your family and friends. By the way, if a girl congratulates her boyfriend (husband) in this way, then he will probably also appreciate such a sign of attention.

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Vertical lunar informer

Time calculations are constantly encountered in everyday life: from calculating days until a significant date to calculating the time of vacation or the period of payment on a bank loan. A collection of online calculators will help you easily operate such a complex parameter as time.

Time

Time management is not the name of a magic spell from a computer game, but a very real ability that has gained enormous popularity among businessmen and investors. Time management or is a technique for calculating time periods to effectively complete a certain amount of work. Thanks to competent and rest periods, people who use money management techniques manage to do much more than those who do not keep track of time and suffer from.

Naturally, time management is the science of more than just time distribution. The most important skills that allow you to competently organize work include:

• and manage resources;
• prioritize and;
• allocate time and analyze results.

Delegation is the transfer of work to subordinates or colleagues. Many ineffective managers believe that no one can do better than themselves. Naturally, overwhelmed with a bunch of unimportant work, they do not have time to complete priority tasks, as a result of which they become ineffective.

Finding priorities is an equally important thing. states that 80% of the result comes from 20% of the effort. In practice, this means that it is important to complete only those tasks on time on which 80% of success depends. As a rule, there are few such tasks, not strictly 20% as the Pareto principle promises, but usually in the range from 20 to 40%. It is the ability to separate the wheat from the chaff that creates productive leaders and businessmen.

The most famous, effective and at the same time simplest technique is considered to be “Pomodoro”. This is a time management technique, according to which work is performed at strictly designated intervals (usually 20 minutes), each of which is accompanied by a five-minute rest. The Pomodoro technique got its name because its creator measured periods of time using a kitchen timer in the shape of a tomato. Since then, modernized versions of time management have formed the basis for the success of prominent business representatives.

Timing

You can use the principles of money management not only when solving daily problems, but also when planning large projects that take weeks or months to complete. First of all, you should find out by what deadline the project must be completed or how much time is allocated for it. Let's take a closer look.

Number of days between two dates

This tool allows you to determine the number of days between two dates. For example, on October 20, 2017, you were assigned a project that must be completed by January 18, 2018. Going to the calendar and counting the time is not very convenient and it’s easier to use a calculator: just select the type of program and enter both dates. In the answer we see that you have 2 months and 29 days to complete the plan. Not very informative when planning. The program also expresses this time in days, weeks or months. Let's see. You have exactly 90 days or 12 working weeks. With this, you can already build an effective time management system and avoid deadlines.

What date will be in n days

Another convenient tool for efficient work. A large project at work may be assigned with the note “to be completed within 50 days after acceptance of the order.” This is a large amount of time, but again running to the calendar and calculating it is not very convenient. We use a calculator. Let's say the order was accepted for work on April 28, 2017. By what day does it need to be delivered to the customer? Let's change the calculator type and calculate the deadline date. It will be June 17, 2017, Saturday. Having the total number of days and the X date at hand, you can easily distribute efforts to complete the work on time.

What date was n days ago

This calculator will not be useful to you at work, but it will certainly come to the rescue in your personal life. Imagine that you received an SMS message in which your crush congratulates you on your 100th day of marriage. This is an important date that should not be forgotten, so it is better to use the program and find out about it. You received an SMS on July 4, 2017, now it’s easy to find out when you moved in with your crush. So, select the type of calculator, enter the date and the anniversary 100 days. Your memorable date is March 26, 2017, Sunday. It's worth circling this date on your calendar.

Temporary quantities

This calculator allows you to convert one time value into another. Using the program, you can express minutes into days, weeks into years, or centuries into millennia. In practice, this can be useful when calculating working hours for freelancers and freelance artists. For example, you have 28 working days to complete your next order. This is 672 hours. Let's take away the time for sleep 28 × 8 = 224, the time for breaks and rest 28 × 4 = 112 and we get that you have 336 hours for effective work. You can already work with this and use time management techniques for productive work.

Amount/time difference

This program gives you the ability to add hours or days and calculate the total time in months, weeks, days, minutes, seconds and even milliseconds. This is a fun calculator that can be used in practice to calculate the time required to complete several types of work or to calculate the free time remaining after completing a task.

Apparently this is a very common occurrence. I immediately went online to look for an online service that allows calculate how old a person is by his date of birth.

As expected, such services exist. And not a little. Talented PHP programmers took care of "lost in time" and wrote all sorts of calculator scripts for counting years by date of birth, or simply calculating the number of years, months, days, hours, minutes and even seconds between two dates online.

I want to write about some of them.

Calculation of how many years, months, days, hours, minutes have passed by date of birth

Surely many have asked the question: “How many days do I live?” . But not many bothered to count. This is a very tedious task. But using this site:

you can easily calculate by date of birth. You will find out how old you are, months, days, hours, minutes, seconds and even milliseconds.

The service will also tell you when your next birthday will be.

Calculate days and years between two dates - online calculator

http://planetcalc.ru/274/ - with the help of this calculator you will be able to count days and years between two dates in online mode. Just enter the required data and the service will give you the exact result.

Counting the number of days from a date to a date

http://www.calculator888.ru/skolko-dnei/ is another site where you can find out exactly how old a person is. Moreover, it can calculate online the number of years, months, days, hours, minutes, seconds that have passed from one date to another.