Sorry it didn't work : The code I have works acrros B3

It did not work in any cell between B4:b100

It does work, on every cell in the range B1:B100, as long as

1) you enter a value into a single cell
2) you enter a number

If you want to lift the single cell restriction, then remove


Or _
Target.Cells.Count 1

HTH,
Bernie
MS Excel MVP