## Calculate CMC Uncertainty Equations For Your ISO/IEC 17025 Scope of Accreditation

This Microsoft Excel calculator will help you quickly calculate uncertainty equations for your ISO/IEC 17025 scope of accreditation using both interpolation and regression analysis.

All you need to do is calculate the expanded uncertainty at two or more points (i.e. high and low) across the range of a measurement function and enter the results in the calculator. Next, the calculator will calculate coefficients for gain and zero-offset and provide an equation that you can add to your scope of accreditation.

Over the years, I have used this same calculator to help me develop scope of accreditation for ISO/IEC 17025 laboratories. I have found it to be a helpful tool every time I have used it; and, I hope that you find this calculator useful too.

### How This Calculator Will Help You

With this calculator you can calculate CMC Uncertainty equations using several different methods, including interpolation and regression. Plus, I have included additional calculators in case you want to build an equation from more than just 2 uncertainty analysis. This calculator will allow to create an equation from 10 points!

Here are the calculators that are included:

#### Interpolation Calculator

- 2 point Interpolation

#### Regression Calculator

- 2 point Regression Analysis
- 3 point Regression Analysis
- 4 point Regression Analysis
- 5 point Regression Analysis
- 10 point Regression Analysis

### What’s Included

After purchase, you will be prompted to download a zip file. Here’s what’s included:

- Microsoft Excel calculator files (.xlsx, .xls)
- Detailed user’s guide
- A backup file in case you damage the original file

## Calculator Screenshots

### Interpolation CMC Uncertainty Calculator 2pt

Calculate a CMC Uncertainty equation using interpolation from two different test points across the range of a measurement function.

### Regression CMC Uncertainty Calculator 2pt

Calculate a CMC Uncertainty equation using interpolation from two different test points across the range of a measurement function.

### Regression CMC Uncertainty Calculator 3pt

Calculate a CMC Uncertainty equation using interpolation from three different test points across the range of a measurement function.

### Regression CMC Uncertainty Calculator 5pt

Calculate a CMC Uncertainty equation using interpolation from five different test points across the range of a measurement function.

### Regression CMC Uncertainty Calculator 10pt

Calculate a CMC Uncertainty equation using interpolation from ten different test points across the range of a measurement function.

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