Features & Benefits

• Get the exact area : No need to try and interpret hard-to-read z-score tables.
• Calculates the area under the normal curve from a z-score.
• Inverse Lookup: Finds the z-score from a percent of area under the normal curve.
• Computes both 1-tailed and 2-tailed areas and z-scores with a visual reference.
• Easily integrate the formulas into your spreadsheets

Who Should Buy

• Anyone that needs a quick and easy way to convert z-scores into percentages or percentages into z-score.

Select Sample Screen Shots

Find the area under the normal curve Just enter the z-score and you can find the 1 and 2-sided area under the curve. The results are precise to over 8 decimal points.

Inverse Z-lookup Find a z-score from area under the curve. This calculator is does an inverse z-lookup for 1 and 2-sided areas.

Calculator HomePage The two z-calculators are easily accessible from a home main page. Add links to data sets or include your data in the worksheet.