Rounding Up to a Value Ending in 9

by Allen Wyatt
(last updated June 23, 2018)

6

Bob performs calculations and wants to round the results up to the next value that ends in 9. In other words, to set a target retail price he wants to calculate the various costs and then round the answers up so that they end in 9. Thus, $1.42 rounds to $1.49, $1.49 has no change, $9.01 rounds to $9.09, etc.

There are actually quite a few formulas you can use to adjust your prices as you desire. Excel provides a good number of different rounding functions that can be tried. You might think that you could use a simple ROUNDUP function to do the work, as shown in the following:

=ROUNDUP(A1,1)-0.01

This won't work properly, however, if the value in A1 ends with a zero (1.00, 1.10, 1.20, etc.). In that case the formula simply subtracts 0.01 from the original value, converting 1.00 to 0.99, for instance.

The solution is to add 0.01 to the value in A1 before you do the rounding, in this manner:

=ROUNDUP(A1+0.01,1)-0.01

You can also use the CEILING function in almost the exact same manner as you did the ROUNDUP function:

=CEILING(A1+0.01,0.1)-0.01

A different (and shorter) approach, though, is to use the ROUNDDOWN function to do the rounding, in this manner:

=ROUNDDOWN(A1,1)+0.09

You could also use the straight ROUND function in this manner:

=ROUND(A1+0.05,1)-0.01

Shorter still is a solution that doesn't rely on any of the built-in rounding functions:

=(INT(A1*10)+0.9)/10

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Author Bio

Allen Wyatt

With more than 50 non-fiction books and numerous magazine articles to his credit, Allen Wyatt is an internationally recognized author. He is president of Sharon Parq Associates, a computer and publishing services company. ...

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What is two more than 9?

2019-09-11 10:11:47

Peter Atherton

Tom
I suspect that usually you will round up unless there is an offer on the item. That is a question for the management. Here are a few suggestions
=TRUNC(A2,0)-0.01
=INT(A2)+0.99
=ROUND(A2,0)-0.01
(see Figure 1 below)

Figure 1. 


2019-09-10 12:23:21

Tom

Thanks for the info.
Do you know if I want to do only roundup not rounddown?
For example, I want to make decimal always to .99 whether the value is 16.34 or 16.75


2018-06-26 15:33:48

Willy Vanhaelen

@Neill
Your question was a little fuzzy and by re-reading it carefully I realised that you probably meant a sequence of 5th, 15th and 25th. If so, the UDF i posted earlier will not meat your requirements. This UDF then will:

Function FormatDate(X As Date)
If Day(X) > 25 Then
FormatDate = Application.EoMonth(X, 0) + 5
Else
FormatDate=DateSerial(Year(X),Month(X),Application.RoundUp(Day(X)+ 5,-1)- 5)
End If
End Function

If you entrer =FormatDate("6/6/2018) this UDF will return 15 Jun 2018.


2018-06-26 12:18:09

Willy Vanhaelen

@Neill
This User Defined Function should do the job:

Function FormatDate(X As Date)
If Day(X) > 25 Then
FormatDate = Application.EoMonth(X, 0) + 5
Else
FormatDate=DateSerial(Year(X),Month(X),Application.Ceiling(Day(X),5))
End If
End Function

Place this macro in a module.
For the 6th of June for example, enter: =FormatDate("6/6/2018")
The result is: 10 Jun 2018.

Let me know if this meets your requirement.


2018-06-25 02:39:35

Neill

How would you roundup to the nearest x5th of each month (5th (for 26th of prior month through to 5th of current month), 15th, 25th) ?


2018-06-23 14:19:02

Erik

This also works:
=TRUNC(A1*10)/10+0.09


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