Exceljet

Quick, clean, and to the point

Sum by week number

Excel formula: Sum by week number
Generic formula 
=SUMIFS(sumrange,weekrange,week)
Summary 

To sum by week number, you can use a formula based on the SUMIFS function. In the example shown, the formula in H5 is:

=SUMIFS(total,color,$G5,week,H$4)

where total (D5:D16), color (B5:B16), and week (E5:E16) are named ranges.

Explanation 

The SUMIFS function can sum ranges based on multiple criteria.

In this problem, we configure SUMIFS to sum amounts in the named range total by week number using two criteria:

  1. color = value in column G
  2. week = value in row 4
=SUMIFS(total,color,$G5,week,H$4)

Note $G5 and H$4 are both mixed references, so the formula can be copied across the table.

Column E is a helper column, and contains the WEEKNUM function:

=WEEKNUM(C5)

Week numbers in row 4 are numeric values, formatted with a special custom number format :

"Wk "0 // display as Wk 1, Wk 2, etc.

This makes it possible to match week numbers in row 4 with week numbers in column E.

Author 
Dave Bruns
Related formulas 
Excel formula: Sum if by year
Sum if by year
The first argument for SUMIFs is always the range to sum ("sum_range"), and criteria are supplied as one or more range / criteria pairs. In this example, the sum range is a named range called "amount" (E3:E2931), and the criteria are supplied in two...
Excel formula: Sum by month
Sum by month
The SUMIFS function can sum values in ranges based on multiple criteria. In this case, we configure SUMIFS to sum amounts by month using two criteria: one to match dates greater than or equal to the first day of the month, one to match dates less...
Excel formula: Sum by week
Sum by week
The SUMIFS function can sum ranges based on multiple criteria. In this problem, we configure SUMIFS to sum amounts by week using two criteria: (1) dates greater than or equal to the date in column E, (2) dates less than the date in column E plus 7...
Related functions 
Excel SUMIFS function
Excel SUMIFS Function

SUMIFS is a function to sum cells that meet multiple criteria. SUMIFS can be used to sum values when corresponding cells meet criteria based on dates, numbers, and text. SUMIFS supports logical operators (>,...

Excel WEEKNUM function
Excel WEEKNUM Function

The Excel WEEKNUM function takes a date and returns a week number (1-54) that corresponds to the week of year. The WEEKNUM function starts counting on the week that contains January 1. By default, weeks begin on Sunday, but this can be changed.

Related videos 
How to use the SUMIFs function
In this video we'll look at how to use the SUMIFs function to sum cells that meet multiple criteria in a set of data.
How to build a simple summary table
Pivot Tables are fantastic tools for summarizing data, but you can also use formulas to build your own summaries using functions like COUNTIF and SUMIF. See how in this 3 minute video.

Excel Formula Training

Formulas are the key to getting things done in Excel. In this accelerated training, you'll learn how to use formulas to manipulate text, work with dates and times, lookup values with VLOOKUP and INDEX & MATCH, count and sum with criteria, dynamically rank values, and create dynamic ranges. You'll also learn how to troubleshoot, trace errors, and fix problems. Instant access. See details here.

500 Formulas | 101 Functions

Download 100+ Important Excel Functions

Get over 100 Excel Functions you should know in one handy PDF.