Close Window

Birthday To Age Calculation/formula

I am looking for a formula that can calculate a birthdate written as 01/01/01 to the actual age of a person. The function also needs to be accurate in time, for example if the worksheet was created today and I open the worksheet up in 3 years, I need the the ages to reflect real time as of 3 years later. Please help me with this situation, thanks.

Free Excel Courses

Similar Excel Tutorials

How to get your Excel formulas to update when you edit a worksheet. By default, each time you edit the contents of ...

It is a frustration if your Excel calculation results show as #DIV/0!, especially if you are expecting to use this ...

I'll show you how to stop formulas and functions from performing their calculations and updating in Excel. This ma ...

In this tutorial I am going to introduce how to input, edit and manage excel formulas. To start entering a formula, ...

Helpful Excel Macros

- Determine if a cell in Excel contains a formula or function with this UDF (user defined function). This function return

- This macro will automatically close the workbook in which it is located after that workbook has been opened for a certai

- This UDF (user defined function) calculates the Future Value of Compound Interest in Excel. The mathematical formula th

- This free Excel macro formats a selection of cells in the Time format in Excel. This Time number format means that inst

- This macro will hide all formulas within a workbook and not allow them to be deleted. The page will not be protected li

Similar Topics

This formula is supposed to calculate difference between today and date hired to give years and months of service. Works fine for all except if the person was hired in year 2000 then this formula shows 110 y. Any one know how to fix this? or have a different formula that works.

=DATEDIF(E21,TODAY(),"y")&" y "&DATEDIF(E21,TODAY(),"ym")&" m"


I have a spreadsheet set up with an employees information, including the start date. After each year that the employee is working, he gets bumped up on the pay scale. For this reason, I only need to know how many years the employee has been working, rounded down to the nearest year.

This is what I have so far (hire date is in column B):

=((TODAY()-B4)/365)&" YEARS"

This function gives me a number with many decimal places.

I tried:

=ROUNDDOWN((TODAY()-B4)/365),0)&" YEARS"

It tells me I have too few arguments. Please help!

Hello, please help me out with this one.

So I am at work workin on this report and I need a function that will make Excel automatically insert the today's date in a cell (let's say D90) when I fill the content of another cell (for example C90) and the that will be inserted will never change. I tried to use the =TODAY( ) function but it keeps updating the date in the cell to the current date if i reopen the worksheet 2 days later. I need the cell to keep in the cell the date of the day when I filled in the content of cell C90 and do not updated it every time i open the document to the actual date.. Thanks in advance!!

Sorry for the question. Normally I find answers to my excel questions by going through the help tab or by searching on Google. However, I don't even know what question to ask on this one!?!

Basically I have created a spreadsheet with several columns, but I have one column that lists the shirt size (YS, YM, YL, AS, AM, AL, XL, 2X, 3X) of each person. Is there a formula that I can create that will tabulate the number of sizes (i.e. AS=2, AM=7, etc.)?

In previous years I made a column for each size, and simply placed a "1" in the correct column, and had excel just add the 1's from each column. However, that takes more time and space. I was hoping to streamline it this time around.

Thanks for taking the time to read this post. Any help would be appreciated! Thanks, doug

Hi there

I am trying to calculate our On Time Delivery. I want this as a simple percentage of jobs. I have got this running in the following way:

Column M - Estimated Delivery dates
Column N - Actual Delivery dates
Column O - =IF(SUM(M2-N2)>0,1,0)

Then I have calculated On Time Delivery as: =SUM((SUM(O2:O252))/(COUNTA(N2:N252)))

This seems to work fine. My problem is, if we enter a date in Estimated without a corresponding Actual date, the formula for Column O fills out anyway and improves our On Time Delivery Percentage. How can I set this up so that the formula doesn't calculate if there is no data in Column N?

Any help much appreciated



I have an excel worksheet that adds two other worksheets in a data
triangle. I copied it to create a new data set and used find &
replace to change the worksheet references to the new ones.

The cells still contain the result of the old formula referring to the
previous worksheets. The only way I can get the formula to return the
correct result is to edit (F2) each cell and press enter. Calc now
(F9) does nothing.

I've seen this before, but this time, I need to calculate many
thousands of cells and don't have time for this workaround.

Any ideas?


Don S

Happy Day to all,

Can you please help me,

A1= time in
B1= time out
C1= time in
D1= time out

I want to calculate the late and under time,
Office start at 9:am w/30 mins Grace period,
The break time is one hour only, please include over breaktime in calculation.
End of office hours 6:00 pm, strickly no over time

How would I create a system where an excel file is updated in real time with new values? I have a program which logs data, and I want to have excel open, plotting the data in real time. Is this possible?

How do I calculate the number of batches per hour? Here's what I have so far:

Cell B5: start time: 4:15 formatted as 4:15:00 am
Cell B6: finish time: 6:15 formatted as 6:15:00 am
Cell B7: total time: 2:00 formula in cell: =TEXT(B6-B5,"h:mm")
Cell B8: total batches processed: 22 (this is entered manually)
Cell B9: batches per hour: formula in cell: =B8/TEXT(B7,"h")

as long as I have this formula in cell B9 the answer comes out correct which should be 11 per hour.
If the formula in B9 is B8/B7, the answer is 264.0, Is this because of the way excel is reading the total time or the total time is formatted as a time, not an actual number? Is this the correct way to solve the problem?
answer should be 11 per hour.

I made a simple worksheet that we have been manually entering the time for employees, but there are too many errors (even with simple math). Can someone help me convert the time of ex: written 8-4:30 or 10-3 (meaning 8:00am to 4:30pm) where you have the total weekly hours? Right now I have a column for overtime. Is there a way to automatically calculate the over time also? The work day is 8-4:30 with a half hour lunch (lunch is not calculated into the hours, so you minus a half hour). 8-4:30 equals 8 hours. So, if a person works 8am to 6:30pm, how can I set it up where in the first row of time, I will type in 8-6:30pm. In the totals column to the far right, it will display 8 hours. In the (O.T.) column, it will display 2 hours.

This way, when I call in my payroll, I will have the total "regular" hours in one row and underneath, I will have the total overtime hours.

Or... does anyone have a better solution to keeping track of their hours?


Hi Guys,
I need help....I am working production scheduling with Start and End time but there is a lunch time and tea time. Is there any formula to calculate Start time to End time with excluding lunch time?
Here is example :

Lunch time :12:00pm to 1:00pm.
Duration Process :6 hours.
Start Time (8:00am)
End time (5:00 pm)

I need a formula to calculate from Start Time 8:00am and what is the End Time? with 1 hour lunch time...


In Excel I have been trying to find an easier way to calculate a time
difference where the times cross midnight. Example:
Start time: 23:50:00
End time: 00:15:00

How would you formulate an equation to determine the duration of time or
differnce between the start and end time?

I need a formula to calculate Turn Around Time. Find below the sample data and details for your reference.

Received Date & Time: 10/29/2010 3:27:00 PM
Completed Date & Time: 11/1/2010 3:57:32 AM
Business Hours: 08:00 AM to 05:00 PM
Non Business hours: 05:00 PM to 08:00 AM
Weekdays : Monday to Friday
Weekends: Saturday & Sunday

If I calculate TAT for this time period it should show me 1 hour 33 minutes, why because business hours are closing by 5:00 PM on 10/29 so it should not calculate duration after 5:00 PM to until 08:00 AM on next day, however 10/29 is Friday so formula should calculate the duration from 10/29 Friday 3:37 PM to 10/29 5:00 PM and again it should calculate from 8:00 AM on 11/01 Monday and formula should skip Saturday & Sunday.

In this scenario I have completed the task before 8:00 AM on 11/01 so it should show duration of 1hour 33 minutes.

Please let me know if you need any more details

I am trying to figure out how to write a formula to figure out production cycle time.
We will be building 8 "widgets" a day.
We will work 10 hours a day.
There is a 20 minute break at 9:20 am.
Production shuts down for lunch 30 minutes for lunch at 12:30.
Production starts at 6:00 am.
Here is what I can do.
Production cycle time = (10*60)-30/8 or 71.25 minutes
If we start at 6:00 am, the first scheduled cycle completion time = TIME(6,0,0+71.25/1440)

My problem is when I am trying to use a logical "IF' statement to account for the 20 minute break or lunch and still calculate the end of each cycle time through the day I receive a number of error messages.
This is the formula I am trying to make work. I have the cell the formula is in, formatted with a "mm,ss" format.
I have included an attachment to help (a picture is worth a thousand words).

Any help will be greatly appreciated.
I have bought a number of books in an attempt to figure this out, and I am still stumped

i have a worksheet with formulas in 15,000 cells; i have set the calculation to maunal so that you have to press F9 to calculate the sheet. \

sometimes, it takes 45 seconds to calc the whole sheet, other times, it takes 5 minutes. how do i clear the cache, or what do i have to do so that it calcs 45 seconds each time.

i don't want the application to think, it would be better if those 15,000 cells can be returned in a fraction-of-a-second. any ideas/tips? thanks.

I have a spreadsheet with simple (addition/subtraction) formulas. The file is quite large and the formulas are too. All of a sudden, the formulas stopped working except when I double click in the cell containing the actual formula. For example, if I enter "2" in each cell, A2 and B2, cell B3 should reflect "4" because there is a formula in cell B3 which totals cells A2 and B2. Only by double clicking on cell B3 will the program actually calculate. I'm totally perplexed and so is my IT contact. Anyone?

is it possible to put two formulasinto one cell?

On the attached timesheet there are columns IN, OUT, IN,OUT
The lunch time is worked out by deducting 'C8 from C9' and this works fine when all 'IN, OUT' cells are filled in but for some reason when just the first two cells are filled in it gives a -12 hour answer.

looking at cell 'C11 ' in the attached worksheet, I currently have the formula
=IF(C13=0,","SUM(C9-C8)) The reason for this is to make it look tidy by having blank cells until a calculation is needed,, My problem is, If someone just comes in for the morning one day for instance 8am to 12 noon then they won't have lunch, but C11 will show -12:00
Can I put another formula into C11 to tell it not to deduct C8 from C9 until a time is put into C9.
The following is the sort of thing (many variations) I have been trying but because I'm hopeless at formulas I'm not having any success


I am using the following formula to calculate the number of days between a date and the current date: =DATEDIF(A1,TODAY(),"d") What do I add to the formula to leave cell blank if no date is entered in the cell for calculation.

I found this solution for "drop down list with hyperlink" but it did not work.

Perhaps a better solution is to use a workaround that relies on the HYPERLINK function to refer to whatever is selected in the drop-down list. For instance, if you have your data validation drop-down list in cell A1, then you might put the following formula in cell B1:

=HYPERLINK(A1, "Goto Link")

The solution directly above provides exactly what I am looking for
in the field where I write the formula, but it fails to hyperlink.
I have created a drop down list and linked each one of them to a
specific worksheet. When I select them individually they link to
appropriate worksheet. But when I select them in the drop down
list I receive the following error when I select the Hyperlink in
cell B1 as directed above.

"Cannot open the specified file"

Any thoughts?


I am looking for assistance in having one cell in a text format equals another cell that contains a time value in hh:mm format.

For example: Cell A1 has a time format (hh:mm) value of 04:00; which is the Start Time. I would like cell D1 to have a text format value of "04:00" (result is dependant upon what is entered in A1). I would duplicate the same formulas to reflect Stop Times in other cells.

My final result is to have another cell (F1) use the Concatenate formula to have the Start and Stop time shown in one cell as "04:00 - 12:30". The times would change based on the Time formated values entered into the Start and Stop time cells.

I have researched this in the board and found many excellent ways to do the opposite, but not convert Time format to Text format. Any assistance is greatly appreciated.


I am trying to calculate the average Talk Time into Minutes and Seconds. Every time I have tried, I get the wrong average.

For example, if I have a total of 53 calls and the total talk time is 4:19:05, what would the average talk per call be? I tried doing everything in seconds (this would give me a total of 15545 seconds) but the total I was getting is 4:89.

What would the formula be to get the correct average time?

Good day... I need an IF Function that will allow me to action a time in a time range:

... If the time 04:16 falls in the time range 04:00 - 04:29, than put a one (1) in the filed x...
... If the time 04:16 doesn't fall in the time range 04:00 - 04:29, than leave the x fiel empty

Any help is appreciated.

I am trying to work out how to calculate the geometric mean of a series of values, some of which are negative, ie. investment returns over a series of years with some negatives.

The Geomean function doesn't work because it only uses positive numbers.

Any help would be greatly appreciated.

How can I calculate a 3% anual rent increase over 15 years (3% over the last year's rent)?


I have two columns of data: column A contains the date and time in the form dd/mm/yyyy. Column B contains a number value. All the times are in order, so column A looks like:


I have data from 2007 to 2010. I need to calculate an average daily value (in column B) for each month, and display it in column C. So, for January, I need to calculate the average of 31 days, February, 28 days, etc.

Is there a function I can use to do this? I've been trying the AVERAGEIF formula but can't get it to work. Any ideas would be much appreciated!

Many thanks,

Related pages

developer ribbon excelexcel macro text boxconvert stone kiloexcel dotted line printcreating a multiplication table in excelmortgage prepayment calculator excelexcel formula for overtimebackward vlookupfree training matrix template excelexcel lookup exactrecord macro autohotkeyexcel 3d surface charterror 91 vbalitres per 100km to mpg ukapplication.filedialog msofiledialogfilepickervba double clickkeyboard shortcut for format paintershortcut key for highlight in excelovertime spreadsheet templateconvert minutes to tenthsexcel count alphabet7 day rotating rostervba code to copy and pasteexcel interpolate functiondecile calculatorexplain pmt function in excelinsert picture in header excelsalary sheet excel templatemacros disabledmsofiledialogopenvba to unprotect sheet with passwordnumbered raffle ticket template freedde stockunhide personal xlsbexcel scheduling template employeeshow to convert euros to dollars formulaincrement in excelstacked columns in excelhours calculator with lunchprinting barcodes in excelexcel macro vlookupvba set cell colormerge excel worksheets into one master worksheetlinear interpolation calculator excelmacro transposevba excel hyperlinkpmt formula excelexcel square root functionisblank in exceldegrees keyboard shortcutchartrangesumifs with orweibull plot in excelnavy prt calculatorfourier analysis excelifna excelformula for kilowatt hourswrq reflection for unix and openvmshow to split cell contents in excelactive row vbanonlinear curve fitting excelvba roundupexcel depreciation scheduleconvert ist to estexcel formula to delete duplicatesexcel vba loginhow to calculate percentages excelerror message excel cannot complete this task with available resourcesr1c1 excel3d graphs in excel24 hour roster examplesexcel vba exitkml excelcalculating per diem