How to Calculate DA, PA, DR, DV, CF, TF for your SEO Analysis

Each Backlink Audit Tool uses different calculation method reason is each tool have a different capability for link discovery (Incoming Links) and relevant metrics. So these tools are best optimized on their capability and updates happening in SEO space regularly.

But the equations for core algorithm are the same for evaluating domains.

I`m breaking down below piece by piece for major indicators like DA – PA – DR – CF – TF – DV so you can grasp more what these metrics represents and use them properly for your SEO decision making.

Also check here for; Backlink Checker & Audit Tools Comparison : Ahrefs, Moz, Semrush etc. for general performance of Backlink Audit tools.

Moz started and maintaned leader position for a long time then few years ago they focused on local SEO and put link discovery speed and other issues such as Ai integration to audit and keyword research to secondry priority. Which was a mistake for Moz, when the competing firms growing Moz stays the same but it`s safe to say Moz single handedly built the standarts of keyword research and Backlink analysis tools.

So now lets dive in how these metrics are calculated ?

How to Calculate Moz Rank and Moz Trust?

• Domain Authority (DA) – Moz (Semrush uses same model)Moz Rank : Proprietary algorithm but core function works like this and the main goal is General health of the website and
  relevant interactions. (Checks what`s missing basically)

  

  calculated as:$mR$ is the MozRank of the target page.
  
  mRi is the MozRank of the linking page
  
  Li is the total number of outbound links on the linking pageExample of how to calculate Moz Rank

          Moz Trust : Measures external links and their quality

• TrustScore​ is the trust score of the linking site
• LinkDistance​ is the number of hops (number of devices) from a trusted seed site to the designated website.

Domain Authority effected by quality and quantity of backlinks to a domain. A simple way to approximate this is by using the logarithm of the sum of Moz Rank and Moz Trust of all linking domains.

So in this calculation we ended up :

• Page X MozRank: 2.8
• Page X MozTrust: 21.5

How to calculate Page Authority (PA) – Moz

Page Authority is similar to Domain Authority but focused on a specific page. A simple approximation can be the logarithm of the sum of MozRank and MozTrust of all links to the page.

How to calculate Domain Rating (DR) – Ahrefs

Domain Rating is influenced by the number and quality of referring domains. A simple way to approximate this is by using the logarithm of the sum of the authority scores of all referring domains.ust

Example Calculations

1. Domain Authority (DA):
   • Suppose you have the following linking domains with MozRank and MozTrust:
     

     Calculation of Domain Authority (DA)

      

      

2. Page Authority (PA):
   • Suppose you have the following links to a page with Moz Rank and Moz Trust:
     • Link A: Referring Link
     • Link B: Referring Link
3. Domain Rating (DR):
   • Suppose you have the following referring domains with authority scores:
     • Domain A: Authority Score 50
     • Domain B: Authority Score 40
       

       How to Calculate Page Authority (DR)

How to calculate Trust Flow (TF) – Majestic

Trust flow metric build by Majestic SEO

and for the normalized Trust Score

Normalization (Optional)

Meaning as taking mean average or rounding up the numbers for more optimized outcome. Keep in mind these metrics are not certain values for SEO efforts again discovery of the sources online varies by service to service.

Here is a detailed test results of their capability.

How to calculate Citation Flow (CF)

Citation Flow build by Majestic also and it`s the summary of number of citations or backlinks it has.

Example of Citation Flow

Algorithm for Citation Flow

Citation Flow for the given example is 1.95

Domain Value by Page Ads

In 2023 we noticed update cycle and and metrics provided by these tools are not sufficient enough so we come up with general valuation algorithm covers every aspect of incoming and outgoing links, keywords + competition and much more. This new proprietary algorithm by far best in the industry due to our test results.

Domain Value (DV) encapsulates DR,DA,PA,CF,TF and all those metrics and giving you a general score. Thanks to latest Keyword Research Module build by Page Labs now its possible to pull metrics from each footprint a website makes online.