The Excel HLOOKUP Function

Related Functions:
LOOKUP Function
VLOOKUP Function

Basic Description

The Excel Hlookup function 'looks up' a given value in the top row of a data array (or table), and returns the corresponding value from another row of the array.

The syntax of the function is :

HLOOKUP( lookup_value, table_array, row_index_num, [range_lookup] )

Where the function arguments are as follows:

lookup_value - The value that you want to look for, in the first row of the supplied data array
table_array - The data array or table, that you want to search the first row of, for the supplied lookup_value
row_index_num - The row number, within the supplied array, that you want the corresponding value to be returned from
[range_lookup] -

An optional logical argument, which can be set to TRUE or FALSE, meaning :

TRUE - if the function cannot find an exact match to the supplied lookup_value, it should use the closest match below the supplied value

(Note: If range_lookup is set to TRUE, the top row of the table_array must be in ascending order)

FALSE - if the function cannot find an exact match to the supplied lookup_value, it should return an error

Wildcards

In text-related Hlookups, the lookup_value can contain the following wildcard characters:

?    -    matches any single character
*    -    matches any sequence of characters


Hlookup Function Examples

Hlookup Example 1

Cells A2-F6 of the spreadsheet below, show the exam scores for 5 students in 4 different subjects. If you want to look up a specific score (eg. Biology) for one of the students (eg. Ed), this can be done using the Hlookup function, as shown in cell B10 of the spreadsheet.

 Formulas:

Example of use of the Excel Hlookup Function

 Results:

Excel Hlookup Function Result

In the above example, the Hlookup function searches through the top row of the table_array (the range A2-F2), to find a match for the lookup_value (the name "Ed"). When the the name 'Ed' is found, the function returns the corresponding value from the 5th row of the lookup_table.

Excel Hlookup Example Explanation

This is illustrated on the right. The function finds the name 'Ed' in the top row of the table_array and then returns the value from the 5th row of the table_array.

If we change the name in the individual spreadsheet from 'Ed' to 'Cara', the Hlookup functions would automatically recalculate the functions to display the exam results for Cara.


Hlookup Example 2

Cells A1-F3 of the spreadsheet below, show body types relating to body mass index (BMI), for the ranges 0 - 18.4, 18.5 - 24.9, 25.0 - 29.9 and over 30.

Cell C6 shows the user's current BMI, which is 23.5, and cell C7 shows the Hlookup function that is used to look up the body type that relates to this BMI.

Example of use of the Excel Hlookup Function

The Hlookup function in the above spreadsheet returns the result "Normal Weight", which is the correct body type for a BMI of 23.5.

Note that, in this example, the range_lookup argument is set to TRUE, to tell that function that, if it cannot find an exact match to the supplied lookup_value, it should use the closest match below this value. Therefore, for all BMIs up to and including 18.4 the function would return "Underweight", for all BMIs between 18.5 and 24.9, the function would return "Normal Weight", etc.


Further Hlookup Examples

For a practical example of the HLOOKUP function being used to create a variable drop-down list, see the Variable Drop-Down List page.

Also, there are further examples on the Microsoft Office website.


Hlookup Function Common Errors

If you get an error from the Excel Hlookup function this is likely to be one of the following :

Common Errors
#N/A - Occurs if the Hlookup function fails to find a match to the supplied lookup_value
The cause of this will generally depend on the supplied range_lookup:
if range_lookup = TRUE
(or is omitted)
- the #N/A error is likely to be because the smallest value in the lookup row is greater than the supplied lookup_value
if range_lookup = FALSE -

the #N/A error is likely to be because an exact match to the lookup_value is not found in the lookup row

if you can't understand why this is, check out Common Problem No. 1 (below).
#VALUE! - Occurs if either:
- The supplied row_index_num argument is < 1 or is not recognised as a numeric value
or
- The supplied range_lookup argument is not recognised as TRUE or FALSE
#REF! - Occurs if the supplied row_index_num argument is greater than the number of rows in the supplied table_array

Also, the following problem is encountered by some users:

Common Hlookup Problem

You can see the value that you want to look up in your table_array, but your Excel HLOOKUP is returning the #N/A error. Why can't it 'see' the lookup_value in the table_array?

Possible Reason No. 1

You may have unseen spaces at the start or end of either the value you are looking up, or in the cells of your table_array. These spaces cause your lookup_value cell and the 'matching' cell in your table_array to have slightly different content.

Solution No. 1
Check the contents of the cells that you believe should match. If there are unseen additional spaces in one or both of the lists, remove these using the TRIM function:
  1. Create a new row or column next to the one with the additional spaces in it
  2. Use the TRIM function in your new row or column, to get rid of extra spaces
  3. Copy the contents of the new row or column and paste these over the top of the original row or column, using paste->special->values
  4. Delete the row or column containing the TRIM function
Possible Reason No. 2

The contents of the cells that are being compared may have different data types. For example, the cell containing your lookup_value may be stored as a number by Excel, whereas the values in your table_array may be stored as text even though they look like numbers.

Solution No. 2
Force both sets of data to have the same type. For example, if you want both sets of values to be stored as text, convert both sets of data to text, using Excel's Text To Columns tool:
  1. Use the mouse to select the cells you want to convert to text (this must be done one column at a time)
  2. From the Data tab at the top of your Excel workbook, select the Text to Columns ... option
  3. Make sure the Delimited option is selected and click next
  4. Make sure all the delimiter options are unselected and then click next again
  5. You should now be offered a selection of Column Data Formats. Select Text and click the Finish button

The data in your selected cells should now be stored as text within Excel and so the Excel Hlookup function should be able to 'look up' the matching value.

Note that you could have chosen to convert the contents of your cells to Excel's 'general' type, by simply selecting the column data format General in the Text To Columns tool.
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