Formula (Example Logic): BQS = Overall quality score based on authority, relevance, traffic, spam score, and content quality.
Steps:

1. Enter Domain Authority (0–100).

2. Add Relevance score (how related the site is to your niche).

3. Enter estimated Traffic value.

4. Add Spam Score (lower is better).

5. Enter Content Quality score.

6. Click calculate to get your Backlink Quality Score.

Higher BQS = Stronger, safer backlink.