zScore Calculator

Download an Excel workbook which calculates the percent of area under the normal curve from a z-score and finds the z-score from area under the curve.

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$21.99 Now :

If you will be making copies or distributing the product, please purchase the site license

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.

Z-Score Calculations

Percent of Area from Z-score
Z-Score from Percent of Area (Inverse Lookup)

What Customers are Saying:

I needed to know how to perform a statistical test in Excel but could not figure it out. This calculator gave me exactly what I was looking for.

Sharon Kaiser

We are very impressed with the zScore Calculator tool.

Dr. Ann-Margaret Esnard
Director, Visual Planning Technology Lab
Florida Atlantic University

$21.99 Now :

If you will be making copies or distributing the product, please purchase the site license All major credit cards, debit cards and PayPal Accepted.

All major credit cards, debit cards and PayPal Accepted.