The Septuagint (LXX) Greek Psalter differs in numbering from the Masoretic Hebrew text that is the basis for Protestant English Bibles and many modern Roman Catholic Bibles.

The difference in numbering is shown in the chart below.

Here’s a more detailed listing:

Septuagint Hebrew

Nos. 1–8 Nos. 1-8
9: 1 – 21 9: 1-21
9: 22-39 10: 1-18
Nos. 10 – 112 Nos. 11 – 113
113: 1-8 114: 1-8
113: 9-26 115: 1-8
114 116: 1-9
115 116: 10-19
Nos. 116-145 Nos. 117-146
147: 1-9 147: 12-20
Nos. 148-150 Nos. 148-150
Psalm 151 Septuagint (not in English Bibles based on the Hebrew Masoretic text)

The numbers are the same for Psalms 1-8. Psalm 9 in the Septuagint combines 9 and 10 in the Masoretic. Psalm 113 in the Septuagint combines Psalms 114 and 115 in the Masoretic. Psalms 114 and 115 in the Septuagint are combined in Psalm 116 in the Masoretic. Then the Septuagint’s Psalms 146 and 147 are combined in Psalm 147 in the Masoretic. The Septuagint includes Psalm 151, which is not contained in the Masoretic text used by most English Bibles today.

Note that the verse numbers for the Psalms can also differ, because the Septuagint in later numbered versions generally counted the “heading” for the Psalm as the first verse, which English Bibles usually do not do.