Calculate Months Between Dates
Aug 21, 2007
I am building a template to auto populate budget value by straight line based on task start/end date criteria. some tasks could give me correct duration distribution, but some don't. I am looking for If function, which could give me correct monthly allocation budget. Here is an example of what I am trying to achieve. task 0110 duration is from 09/15/07 to 05/24/08, duration month is 8. budget $34,465supposed to be allocated to 8 month starting from Sept, 07. but my if logic return 9 month instead.
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Oct 5, 2007
Is there a formula which would show the number of months between two dates eg.
15-Jan-06 to 30-Nov-07 = 23 months
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Dec 20, 2006
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?
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May 19, 2014
I am trying to calculate the number of months in a specific year between two dates.
For example.
Start date 01/06/2012
End Date 01/02/2013
Number of months in 2012 = 6
Number of months in 2013 = 2
How can I write a formula to give me the answer of 6 & 2 from the start and finish dates?
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Dec 20, 2013
I want to display the percentage of occupancy for each month for condo rentals.
I have columns with dates that represent bookings throughout the year. check in and check out dates to be more precise. (A1 and B1 for example) and I have columns with months Jan, Feb, etc. (C1, D1, etc. for example)
The problem I run in to is that I can calculate the number of days between the dates and the fraction of the year (*12 to get a monthly value, but I fail to understand how I can break that up so that I can populate each month with a correct percentage of the total term.
E.g. A1=1-jan-2014 and B1=20-jan-2014 is an easy one because it only covers 1 month:
formula: =(YEARFRAC(A1,B1,3))*12 gives me 62,47% which I could just use as is for that month.
So far so good, but when the period covers more than one month or when the months overlaps, I don't know how to break the outcome up into the appropriate months to display the correct percentage for each month in its own column.
e.g. A1=1-jan-2014 and B1=20-Mar-2014 gives me a result of 253% with the same formula.
100% for November, 100% for December and 63% for January, which I could somehow formulate to break up over different Months.
But then it gets more tricky. What if the booking starts on a day other than the 1st of the Month?
e.g. A1=5-jan-2014 and B1=20-Mar-2014
The result of the formula (243%) is correct, but isn't sufficient to put the correct percentages for each month in their respective column.
What formula(s) should I use to break down the percentages to match the correct fraction of each individual month?
I attached an example of what I have so far for your review : test.xlsx
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Dec 6, 2013
I have a date column (Column E: Date Entered) on my spreadsheet that I need to set conditional formatting on. There are two conditions:
1) 18 months from the date in the cell needs to be highlighted yellow
2) 24 months from the date in the cell needs to be highlighted red
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Nov 9, 2009
I need to be able to calculate age in months, and round whatever remainder to the middle of the month (.5). I am calculating z-scores and percentiles for in a childhood obesity project. The DoB and Date of measurements must be converted to read anything from 142.0 to 142.9 as 142.5.
This value will be used to look up the the appropriate LMS (Box Cox, Median, and Standard Deviation) in another excel table. I have to be able to compute age in months so 142.5, 143.5, 144.5, 144.5 etc. It is just not rounding off to the nearest half month.
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Oct 5, 2006
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"
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Jul 14, 2009
I have a row containing:
Date entered
Name
Date of Birth (DOB)
Occurrences of Name + DOB this Month
Occurrences of Name + DOB within last 3 Months
Occurrences of Name + DOB within last 6 Months
I can manage the occurrences this month but haven't a clue how to calculate the 3 and 6 months ones. I have attached a sheet.
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Oct 14, 2009
I'm trying to make a formula that will calculate the average of the previous 12months. The goal is to tie the formula to a reference cell that contains a date. Each time the date is changed by a user the calculation will be updated accordingly. Here is the CSE formula that I thought would work:
{=AVERAGE(IF($B$5:$B$53=B$2,OFFSET($C$5,(COUNT(C5:$C$53)-1),0,12,1)))}
I've also attached a sample file to illustrate the problem. The 'range' portion ($C$5,(COUNT(C5:$C$53)-1)[/b]of the Offset function was setup simply to get the 12 months which preceeded the reference date.
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Apr 12, 2006
Start date: 12/04/2004
End date: 12/04/2006
The formula should give the answer to 24 months
Example 2
Start date: 12/04/2004
End date: 13/04/2006
The formula should give the answer to 25 months
When I use function =(YEAR(A4)-YEAR(A3))*12+MONTH(A4)-MONTH(A3), it does not
show 25 months for "Example 2" as it is still within the same month "April"
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Feb 1, 2012
I need to automatically calculate the number of months a deal runs through 2012 dependant on the start and end date.
I have attached a basic spreadsheet. Column C shows the results I would like the formula to calculate.
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Jul 30, 2007
Is there a way to add # of months to a date and then find out what would be the exact date?
For example if cell A1 = 04/30/07 and Cell B1 = 14 what is the statement that would give me 06/30/08 in Cell C1?
Also, how can I modify the statement if Cell B1 = 14.5 to get 07/15/08?
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Mar 26, 2009
I am trying to calculate Inventory Months Supply.
I can calculate the months suppply as shown below in multiple cells, but I am looking for a formula to do in one cell..
The correct result in this example is: 2.26048
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Dec 23, 2013
finding a formula to calculate the number of months between two dates. I've attached an Excel spreadsheet with sample data. Some are in the future, and some are in the past.
Excel Help.xlsx
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Aug 10, 2014
I was wondering if this can be done we have a monthly award program so if a date was entered for that drive on this month it would = no if blank =yes but needs to reset each month?
=IF(AND('Driver'!A51:A1000)="",IF('Driver'!A51:A1000>='Driver Bonus'!A3,"YES","NO")) This brings back a #value! error
=IF(AND('Driver'!A51<=A3,'Driver'!A51>=A3),"NO","YES") this works but only for that cell i need to also recognize cells A51:A1000
=IF(MAX(INDIRECT("'"&A8&"'!A51:A1000"))<A3+1,IF(MAX(INDIRECT("'"&A8&"'!A51:A1000"))<>A3,"YES","NO")) this also works but only for 1 day
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Aug 7, 2009
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
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Feb 27, 2013
I have a table with model numbers as column A, and Row 1 contains dates, each columns contains net sales, my question is there any simple way to group all dates into months and years, i have tried using a pivot and it doesnt work correctly Screenshot (1).png
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Jan 13, 2010
I would like a formula (if it is possible) that will list which months occur between two dates;
i.e
Start Date (Cell ref A2) = 01/01/2010 (in the dd/mm/yyy format)
End Date (A3) = 02/05/2010
In cells D2:O2 I have the months Jan-Dec. In cells D3:O3 I would like a "Yes" to appear if the above month occurs between the dates in A2 & A3. In this example would like a "Yes" to appear in cells D3, E3, F3, G3 & H3 but not in the other 'Months' appropriate cells.
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Oct 7, 2011
I need a formula to count the months (including part months) between 2 dates.
So i want 01/04/11 to 5/5/11 to equal 2
I have tried a few formulas that get the answer 1 but i need it to count the part month too.
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Nov 28, 2013
I have a column of dates, and wanted to count how many of them are within 3 months of todays date.
I wrote this obvious formula, or so I thought, as it displays zero results, when here should be loads.
=COUNTIF(A:A,>(TODAY()-90)")
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Apr 12, 2007
Which formula should I use to return years and months between two dates.
4/1/05 7/30/25
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Sep 27, 2007
say C2= 22/02/2007. in cell C4 When I use this formula =TODAY()-C2 to get the difference between today and a past date the result the formula give is 07/05/1900
i would like to receive the difference in Months between the past date and today? I.E. HOW MANY MONTHS IN BETWEEN
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Jan 5, 2012
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.
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Jul 9, 2012
I wrote code that works just fine, however, I realized there were parts of the data I was using that had 0's in it for holiday.
Bottom line, this is code that calculated the weighted average of prices for 12 months (12 rows across) and Drows across. I'm trying to use the "do while is empty" approach but can't get the syntax to work. Here's the code
Code:
For r = 1 To drows
Totwavg = 0
Tothours = 0
priceavg = 0
For n = 1 To ncontracts
[Code] .....
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Sep 13, 2009
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"
C7 3/24/04
D7 1/4/08
What is returned is 3 years, 9 months, 136 days
How might if fix it show the correct days?
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Jun 17, 2014
i have column A and B with list of dates. Column A has earlier dates when compared to column B.
i am trying to find a formula with which i can know the difference between the dates in "number of months".
Ex: Column A has 06/01/2014 and Column B has 08/30/2014. The difference between the dates in terms of month is 3 which i need in a formula.
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Jun 18, 2014
Is there any way to organize a list of various months and dates
First by creating a column of just the months, then by all of the dates, serperated by commas?
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Mar 20, 2014
I have a problem again with one of Date Dif function " =DATEDIF(I5|J5|"m") " in attached file i have this function applied to calculate number of months in between two given dates but it seems this function is not working properly or i am missing some info in this to make it run properly. How to fix this function or give me a proper one which can solve my problem to calculate accurate months between these dates in attached file...
Excel Date problem.xlsx
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Oct 31, 2012
i have first date in cell a1 and second date in cell b1. I want formula to to how many months are in between these two dates,, for example
first date: 1 jan 12
swcond date: 5 apr 12
result: 4
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