Written and reviewed by FormulaCraft Team. Each formula on this page is run through our verification engine before publishing.
Last reviewed:
NORMINV
NORMINV finds the x-value at which the cumulative normal distribution equals a specified probability, essentially the percentile value. Use it to determine cutoff scores, risk thresholds, or any scenario where you need to know what value corresponds to a given probability under a normal distribution.
Excel
=NORMINV(0.95,70,10)Google Sheets
=NORMINV(0.95,70,10)✓
Verified example
Computed by a real spreadsheet engine on the sample data below.
| Probability | Mean | StdDev |
| 0.95 | 70 | 10 |
| 0.75 | 70 | 10 |
| 0.50 | 70 | 10 |
=NORMINV(0.95,70,10)→86.4485362695
Try it with your data
Edit the grid or formula, then run it through a real spreadsheet engine — no signup.
Sample data — click any cell to edit
Runs server-side · free · no signup
How it works
- 1Specify the target cumulative probability (between 0 and 1), such as 0.95 for the 95th percentile.
- 2Provide the mean and standard deviation of the distribution.
- 3Enter =NORMINV(probability, mean, standard_dev) to get the corresponding x-value.
Need a version for your data?
Try: “Find the test score cutoff that only the top 5% of students exceed given a mean of 70 and SD of 10”