I was asked by a colleague how they could put a persons date of birth in one cell, todays date in another, and return their age in years and months. Accuracy to within a month. This is what I gave them.

=TRUNC((B1-A1)/365.25)&" Years "& ROUND(((B1-A1)/365.25-TRUNC((B1-A1)/365.25))*12,0)&" Months"

I have two columns with dates (and times) in that I am trying to define how many days, hrs and mins have elapsed i.e. A1 has 12/12/06 21:00, B1 has 17/12/06 21:00. C1 has B1-A1 and is custom formatted to show as dd"days" hh"hrs" mm"mins". In this case it will therefore show as 5days 0hrs 0mins. Which is correct.

However, if more than 1month has elapsed then the format m"m" d"days" h"hrs" m"mins" does not work. For example 17/03/06 03:00 to 20/12/06 07:00 shows as 10m 4days 4hrs 00min, which it clearly isn't.

I know the reason it does this is because it calculates the difference between the two times and adds that to it's 0 value, which in my format is 01/01/1900 00:00. therefore when it adds 277days (the answer) it becomes 04/10/1900 04:00, so my formatting is just calling the month value ('10') and the day value ('4').

I understand the reason it does this, 277 days on from 01/01/1900 is indeed Oct 4th, but 277 days on from 17/03/06 is not 10months and 4 days as there are different length months in between. It also seems to add a month on, possibly because the format for 'months' is between 1 & 12 and therefore cannot begin at 0?

Does anyone know if it's possible to force excel to work out the correct number of months and days have elapsed between two dates and not apply it to 01/01/1900? Or any other possible solution, maybe with a different custom format?

I have a large sheet of daily river flows and precipitation amounts, over 40+ years.

I want to calculate the average flows in each month of each year (ie 11/1968, 12/1968, 1/1969 etc). Dates are in Col A, flows in Col D.

How to average a particular month over all years like so:

{=AVERAGE(IF(MONTH(A2:A15282)=1,D2:D15282))}

But I don't know how to average per month of each year, or how to make a formula that will allow me to quickly calculate the averages of 100s of months.

I am using the following formula to calculate years months and days in Excell 2007 =DATEDIF(C7,D7,"y") & " yrs, " & DATEDIF(C7,D7,"ym") & " mths, " & DATEDIF(C7,D7,"md") & " days"

The issue is i want years and months between two dates which are not in computer language. Date like 2008/12 and 2010/01. File is attached for you reference

I have been trying to figure out a formula to convert the amount of months in a certain cell to years.

I have come up with:

=INT(E29/12)&" years "&MOD(E29,12) & " months"

The problem is it comes up with 2 years 3.37063951499227 months

How I change it to come up with 2.4 months, round it to the highest number instead of loads of decimal places? I have tried change cell E29 do 0 decimal places but it doesn't work.

Is there a way to show in excel that something feel within a specific time frame? An example being if I want to see the amount of time it took to close a customer service ticket. I would take the closed date minus the raised date, but then I would like to show in a cell it was open from Feb to Mar 2011.

my spreadsheet is setup with two dates: A date for when someone joins our group A date for when they are released/leave

I want to be able to see exactly how many years/months/days transpired between these two dates. I have tried lots of different formulas with no success.

See attached. (I added in some arrows for the first month so it is easier to follow the logic)

I am working with monthly revenues. Revenues are earned in a specific month but only a % is received in that month and over the next 4 months. I need a formula that will spread these revenues earned in 1 month over the next 4 months.

Currently, I have a complex Index/Match formula which works until September. September, October, November, and December do not work correctly because once the months roll over from month 12 (December) back down to month 1 (January), my formula cannot recognize the range.

Essentially, I need the formula to return the correct amount that is being paid, even across different years.

I don't know if my formula can be modified or a new formula would be more efficient.

(This post originated from Commercial Services, which I just requested be removed from that forum)

9 Nov 2012 Apple 5 12 Dec 2012 Apple 3 14 January 2013 Banana 8 17 January 2013 Apple 6 20 January 2014 Apple 3

I would like a sumifs formula that will only add the results for Apple - as follows:

Nov 2012 5 Dec 2012 3 Jan 2013 6 (i.e. does not include Banana - and also does not include Jan 14 Apple)

Although I have experience with sumifs I have not been able to use the correct syntax to identify the month AND year.

Ultimately I want to look through many hundreds of dates, and add anything that fits two criteria - 1) a 'name' criteria, and 2) it falls within a certainly month and year.

ith the example below, i am having a problem with the calculation of Total Month. If i put Dec 31 2012 in A2 the total month is 10 BUT if I change the A2 to Dec 30, 2012 the total month is 11. What i am trying to do is to calculate the number of months only disregarding the years. example August 15, 2010 and January 16, 2013 i need to have total months of 5 months only.

I have a start date dd/mm/yyyy, and require a formula that everytime a spreadsheet is opened, based on the current date, to calculate how many years, months and days have elasped yy mm dd since the start date...

I have come accross this calendar online and it suits my requirements, however, the month s currently static and the year is dynamically controlled by a spin button.

The formulas in the relevent days are as follows

Day 1 =IF(AND(YEAR(JanOffset+1)=calendarYear,MONTH(JanOffset+1)=1),JanOffset+1,"") Day 2 =IF(AND(YEAR(JanOffset+2)=calendarYear,MONTH(JanOffset+2)=1),JanOffset+2,"")

and so on, I need the formula and the spin button the also change the month as well as the year.

I would like to calculate the number of years and months that have passed since a certain date. Would like it in a number format so I can pickout those who have gone reached 5 year increments during each month.

Such as someone reaching 40 injury free years in June of this year I can let them know.

I am looking for a formula that will return the number of months (periods) between two dates, ignoring days and years. Using the above dates, which cannot be changed, the result needs to be 63. The formulas I have tried keep returning 64 because my later date is at the end of a period, and my earlier date is at the beginning.

I have some cells which must be in the format 15/06/2007 15:25

I then need to add either days, months or years onto it.

Say the above date/time is in cell A1, when I do =YEAR(A1)+5 it displays 2012 if I choose the general cell format, but when I select the same cell format (date time) it comes out as 04/07/1905 00:00

I have a table that lists the months of the year down from cell A2:A13, and days of the week along row from cell B1:H1. The data in between (cell B2:H13) is pulled through from elsewhere in the workbook and is in number format.

What I basically want to do is create another worksheet with the months of the years listed down column A, and in column B, for each month, I want the first day of the week where the value in the original table is more than zero, and in column C the second day of the week where the value is more than zero. I really hope that makes sense, was quite difficult to explain!

I have a spreadsheet with my students that needs to find the date a person will be 18. based on their date of birth. I have =B27+(365.25*18) where their DOB is in B27. I have had several instances where it is correct and several instances where it is a day off.

I need to calculate a quote over 4 years but the first and last years are not full 12 months.

On Row 20 are monthly costs for each year. The start and end date is in Row 3.

I need to find a formula that can calculate ANNUAL TOTAL for the all these year in Row 22 populated automatically, not just manually times the months in each cell.

I have date fields as column labels in a pivot table. When I try to group them I'm only given the option to group by integers and not by months, years etc.

I've had a look at the format settings of the column and they are formatted as date fields.

The formula that I currently have in E2, is giving me the number of years served by an employee. Is there another formula that can give me the number of years each employee has served? This is the formula that I have in E2

I am looking to calculate compound interest over a period of 10 years.

I am looking at putting a lump sum in at the beginning and contribute in monthly installments for the entire 10 years. How would I go about this.. I know there are formulas there, however I'm not a financial person at all..

Per the attached, I am looking to add restrictions to my formula based on YEARS OF SERVICE per the age restrictions each person falls into, those with 0-4 YOS who are under 20 years old etc.

I need to calculate the monthly repayments on a loan taken out over a certain amount of years, which I can do fine.

I just cant get my head around how to calculate monthly repayments over a certain amount of years when the intrest is compounding annualy.

What I have so far:

p*(1+(r/100))^n Where p is value of original loan, r is annual intrest rate, n is amount of years, and I am hoping I am right in saying this is the total repayable amount of the loan?

Then putting that aside I created a amortization table. (which I am certain i forgot to include compound intrest in!)

To keep it short i followed this guide for the amortization table.

and now I am so confused about if I should be using PMT, PPMT, NPER?!