In this article
NORMINV returns the value at a normal probability. It is a compatibility function: Excel keeps it so workbooks from Excel 2007 and earlier still calculate, but Microsoft recommends NORM.INV for new work. Both give the same result.
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Syntax
=NORMINV(probability, mean, standard_dev)| Argument | What it means |
|---|---|
probability |
0..1 |
mean, standard_dev |
Distribution |
Examples
Example 1
=ROUND(NORMINV(A2,B2,C2),2)Result: 62.82. See the worked example table below for more cases.
💡 For new workbooks use NORM.INV: it gives the same answer and is the name Microsoft keeps documenting.
NORMINV in practice
Where you will use it
- Opening and checking older workbooks that use NORMINV
- Understanding formulas shared by colleagues on older Excel versions
- Knowing when to swap in NORM.INV for clarity
Worked example
| p | Mean | SD | Formula | Result |
|---|---|---|---|---|
| 0.9 | 50 | 10 | =ROUND(NORMINV(A2,B2,C2),2) | 62.82 |
| 0.5 | 50 | 10 | =ROUND(NORMINV(A3,B3,C3),2) | 50 |
| 0.05 | 50 | 10 | =ROUND(NORMINV(A4,B4,C4),2) | 33.55 |
Results calculated in Excel. Same result as NORM.INV.
Mistakes people make
| Mistake | What to do instead |
|---|---|
| Using NORMINV in new files | Prefer NORM.INV: same result, clearer name, and the function Microsoft keeps improving |
| Mixing old and new names in one model | Pick one style per workbook so formulas are easy to audit |
Related functions
📚 Part of the free Excel course: Beginner → Expert · Try it in the Formula Lab or ask the AI Helper.
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