If you have a simple Org table like:

| 0.5 | | 1.5 | |-----| | |

And you want the A3 cell to contain the sum of A1 and A2 cells, you would add this at the bottom on that table and evaluate it ( C-c C-c ).

#+tblfm : @>$1=vsum(@1..@>>)

That formula reads as: “Set the value of the cell is last row ( @> ) , first column ( $1 ) be equal to the sum of all cells in the same column from row 1 ( @1 ) to second-to-the-last row ( @>> ).”

But then you end up with an odd-looking 2. instead of 2.0 in the result cell:

| 0.5 | | 1.5 | |-----| | 2. | #+tblfm : @>$1=vsum(@1..@>>)

So I had posted a question on the Org mailing list to understand if this was a bug — it was not.

Using printf style %0.1f formatter #

Thanks to the reply from Thierry Banel to that question, one of the solutions is to use field formatters, like in printf in C (and many other languages):

| 0.5 | | 1.5 | |-----| | 2.0 | #+tblfm : @>$1=vsum(@1..@>>);%0.1f

Using Calc f1 formatter #

Another solution, also from Thierry, was to use the Calc f1 formatter instead of %0.1f (and similarly f5 instead of %0.5f ).

| 0.5 | | 1.5 | |-----| | 2.0 | #+tblfm : @>$1=vsum(@1..@>>);f1