---
title: "R1+R2 Zs Ze Calculator - Reviews, Revenue and Downloads in United Kingdom | Apple App Store"
description: "Calculates R1+R2, Zs or Ze, input two values to calculate the third.   - Calculate: Zs - Calculate: (R1+R2) - Calculate: Ze (not recommended)  A quick and easy way to calculate R1+R2 or Zs.  Check you"
---

# R1+R2 Zs Ze Calculator — United Kingdom
> Calculate R1+R2 or Zs.

![R1+R2 Zs Ze Calculator App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/39/a9/11/39a911d6-0aa2-6b3e-4eca-670d692f878b/AppIcon-1x_U007emarketing-0-11-0-0-85-220-0.png/434x0w.png)

**Developer:** [Pro Certs Software](https://apptail.io/developer/pro-certs-software-BpE) (United Kingdom)
**Category:** Utilities
**Rating:** 3.2/5 (19 ratings)
**Price:** Free
**Bundle ID:** com.procerts.r1r2calculator
**Store:** Apple App Store
**Country:** United Kingdom
**Version:** 4.3.7 (released 2025-07-28)
**Original Release:** 2012-11-02
**Languages:** English

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/gb/app/app/id572416784)
**AppTail Page:** [https://apptail.io/app/r1r2-zs-ze-calculator-fMod/united-kingdom](https://apptail.io/app/r1r2-zs-ze-calculator-fMod/united-kingdom)

## R1+R2 Zs Ze Calculator Description
Calculates R1+R2, Zs or Ze, input two values to calculate the third. 

- Calculate: Zs
- Calculate: (R1+R2)
- Calculate: Ze (not recommended)

A quick and easy way to calculate R1+R2 or Zs.

Check your measured R1+R2 or Zs values with this handy R1+R2 calculator or calculate a value from the other two known values to verify actual measurements obtained.

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

+ Check you measured R1+R2 readings
+ Check your measured Zs readings 
+ Validate or verify your Ze (not recommended)

Although this app allows the calculation of the Ze value, the Ze value should not be calculated. The Ze value should be obtained by actual measurement or by inquiry to the regional electric company. It is good practice to directly measure R1+R2 and Zs values rather than calculating them.

How to calculate Zs:
1) Enter the Zs and R1+R2 values.
2) Tap calculate.

How to calculate R1+R2:
1) Enter the Zs and Ze values.
2) Tap calculate.

How to calculate Ze:
The Ze value should not be calculated, instead obtained by direct measurement or by inquiry to the electricity network company.

## R1+R2 Zs Ze Calculator Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource112/v4/b3/d1/97/b3d19707-64a2-6111-a5f3-a0dd2cd20e58/ec277e60-3448-4f00-bc55-464981618e1c_Calc_Key1.png/1242x2688.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/Purple122/v4/62/e6/c4/62e6c4d6-5417-422d-cf1d-240810e87f64/ca23f5a5-49a3-4d9f-9331-2f4c1df81317_Info1.png/1242x2688.png)

## R1+R2 Zs Ze Calculator Rating Breakdown in United Kingdom
- 5 stars: 9 (47%)
- 4 stars: 1 (5%)
- 3 stars: 0 (0%)
- 2 stars: 2 (11%)
- 1 stars: 7 (37%)

## R1+R2 Zs Ze Calculator Reviews in United Kingdom

### ***** "Great app"
Simple helpful app to make calculations faultless
-- Boredofthinking, 2021-05-19

### **--- "Not good"
I agree with Basic Math if you need this app you definitely need a knew job
-- Astect Gibbo, 2018-08-24

### *---- "Update"
Unfortunately this version does not work on the iPhone
-- Andy Hawton, 2018-01-09

### *---- "Basic math"
If you need this app to do the calculations this app does, you need to find a new job.
Basic math that most electricians could do in their head.
-- Masker14, 2016-10-27

### **--- "Hhmm"
As mentioned by "22w" the ze calculation is wrong. This should be measured!!
-- Wez261, 2013-05-31

### *---- "Oo"
Not a good app. As a calculator to add Ze to [R1+R2] to obtain Zs it's ok. But to use the calculation Zs - [R1+R2] as this app does to obtain Ze is wrong. Ze is either obtained by enquiry from the DNO, or measured with the system isolated, and with all bonding disconnected. Ze is the External EFLI.
-- 22w, 2012-12-10

### ***** "Very good app."
Great app, very useful and handy.
-- Kezzle1982, 2012-11-22

### ***** "Ze + Zs (R1 + R2) calculator"
Great little app. Very handy.
-- Mike Cook, 2012-11-10

### ***** "Zs Ze app"
Great app, very useful. 5 stars!
-- Phillllllllllllllllllllllll, 2012-11-05

### ***** "Very good"
Great app and very useful.
-- Sparky110, 2012-10-31

[View all R1+R2 Zs Ze Calculator reviews and detailed analytics on AppTail](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=reviews)





## R1+R2 Zs Ze Calculator Available In
- [United Kingdom](https://apptail.io/app/r1r2-zs-ze-calculator-fMod/united-kingdom)
- [Israel](https://apptail.io/app/r1r2-zs-ze-calculator-fMod/israel)
- [Argentina](https://apptail.io/app/r1r2-zs-ze-calculator-fMod/argentina)
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- [Vietnam](https://apptail.io/app/r1r2-zs-ze-calculator-fMod/vietnam)
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- [Armenia](https://apptail.io/app/r1r2-zs-ze-calculator-fMod/armenia)

---

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