#DIV/0!
A formula divides by zero or by an empty cell.
What it means
division by zero is undefined, so the formula cannot produce a number. An empty cell counts as zero, which is why this error often appears before any data is entered.
How to fix it
- Guard the division: =IF(B1=0, "", A1/B1).
- Use IFERROR to show a fallback: =IFERROR(A1/B1, "").
- Check that the denominator range actually contains numbers.
Common causes
- An explicit division by zero, e.g. =1/0.
- The divisor cell is empty or holds 0.
- AVERAGE over a range with no numeric values.
- A percentage or ratio computed before its denominator is filled in.
A formula that produces it
=1/0