# R1+R2 Zs Calculator

##### – VERIFY R1+R2 & Zs –

### Have *multiple* R1+R2 *calculations* to complete? It’s *faster* with the *app.*

## Description

**R1+R2 ZS / ZE CALCULATIONS**

Easily calculate the earth loop impedance (Zs) from the R1+R2 and Ze values or calculate the R1+R2 value from the Zs / Ze values.

A handy app for checking & verifying measured R1+R2 values or for calculating a value (Zs, R1+R2) from the other two known values.

While this app can calculate Ze, Ze values should only be obtained by direct measurement or by inquiry, not calculated. It is best practice to directly measure R1+R2 and Zs values.

##### - Zs, Ze and R1+R2 calculations with instant results!

## Features

- Zs

- R1+R2

- Ze

## App Reviews

Don’t take our word for it – here’s what other app users say:

Simple helpful app to make calculations faultless.

Great little app. Very handy.

Simple, slightly faster than a calculator time is in short supply nowadays.

Great app and very useful.

## Calculate R1+R2

**R1+R2 FROM Zs**

To calculate R1+R2 from Zs enter your measured Zs and measured Ze values, then hit “Calculate”.

Calculating R1+R2 or Zs is a very simple calculation but if you have multiple calculations to do then that’s where this app can speed up the process.

**Calculates:**

- R1+R2.
- Zs (Earth Loop Impedance).
- Ze (External Earth Loop Impedance) – not recommended to calculate.

**Enter any two values to calculate the other!**

#### To Calculate R1+R2:

R1+R2 = Zs – Ze

## Calculate Zs

##### Zs FROM R1+R2

To calculate Zs enter your measured Zs and measured R1+R1 values.

#### To Calculate Zs:

Zs = Ze + R1+R2

#### Max Zs

For maximum Zs values see our Max Zs Values App.

## Calculate Ze

**Ze CALCULATIONS**

Ze should not be calculated, Ze should only be obtained by direct measurement with the appropriate test equipment and approved procedures.

## Saves Time

##### R1+R2 Zs CALCULATIONS

If you have multiple R1+R2 or Zs calculations to complete this app can help by saving time, for example, when calculating R1+R1 enter your Ze and Zs values and calculate, then for the next calculation just update the Zs value and calculate again.

- Quick n Easy
- Saves Time

- Calculate Zs from R1+R2 and Ze
- Calculate R1+R2 from Zs and Ze

Enter any two values to calculate the remaining value.

## FAQ's

**FREQUENTLY ASKED QUESTIONS**

#### What is Zs?

Zs is the earth loop impedance of an electrical circuit.

#### What is Ze?

Ze is the earth loop impedance external to the electrical installation.

#### How to Calculate R1+R2

To calculate R1+R2 we can use this formula, Zs – Ze = R1+R2

#### How to Calculate Zs

To calculate Zs we can use this formula, Ze + R1+R2 = Zs

Demo video may show an older version of the app

## Tablets and Phones

**OPTIMISED FOR MULTIPLE SCREEN SIZES**

This R1+R2 Zs Ze Calculator is optimised to work on all screen sizes and resolutions from the iPhone 5 up to large tablets such as the iPad Pro and all Android devices.

**Features:**

- Easy to use
- Preset R1+R2 Zs formula
- Quick and instant results
- Dedicated support team