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How to sum the last N rows in Excel and Google Sheets
Topic:SUM & aggregationExcel & Google Sheets
=SUM(OFFSET(A1,COUNTA(A1:A7)-3,0,3,1))Try it with your data
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Step by step
- 1COUNTA(A1:A7) finds the last filled row by counting non-empty cells.
- 2OFFSET starts that many rows down minus N, then takes a block N rows tall and 1 column wide.
- 3SUM totals that final block — here the last 3 values, 40 + 50 + 60 = 150.
Tips
- Change the two 3s to sum a different number of trailing rows.
- Widen A1:A7 to your real column (e.g. A1:A1000) so the formula keeps working as data grows.
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Frequently asked
How do I sum the last N rows ignoring blanks in between?
COUNTA counts only non-empty cells, so gaps are skipped when locating the end, but the N-row block itself is positional. For scattered data, filter first.
More on SUM & aggregation
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SUMPRODUCT
Multiply ranges together row by row and sum the result — ideal for weighted totals.
How-toHow to calculate a 30-day rolling sum
Sum the 30 calendar days ending on a chosen date with SUMIFS, including timestamps on the final day and excluding future rows.
Error fixFix 0
SUM returns 0 or the wrong total in Excel and Google Sheets — fix numbers stored as text, filtered ranges, manual calculation mode, and circular references.
ReferenceSUBTOTAL
Aggregate a range (sum, average, count…) while ignoring other SUBTOTALs and, optionally, hidden rows. Ideal under filters.
How-toHow to sum a column
Add up an entire column with SUM. Total a whole column or a fixed range — identical in Excel and Google Sheets.
How-toHow to create a running total
Build a cumulative running total with a SUM and a clever anchored reference that grows as you copy it down. Works in both apps.