Calculator Inputs
The page stays in a single-column flow. The calculator fields shift to three columns on large screens, two on smaller screens, and one on mobile.
Example Data Table
| Example Link | Source | DA | Relevance | Spam | Attribute | Score | Verdict |
|---|---|---|---|---|---|---|---|
| Editorial niche mention | industryinsights.org | 74 | 92 | 9 | Dofollow | 86.52 | Excellent |
| General directory listing | directoryhub.net | 39 | 34 | 58 | Nofollow | 43.12 | Risky |
| Sitewide partner footer link | partnerwidgets.com | 57 | 55 | 29 | Dofollow | 59.30 | Moderate |
| Local resource citation | citybusinessresources.gov | 68 | 79 | 6 | Nofollow | 78.28 | Strong |
Use these samples as calibration points while grading your own backlinks.
Formula Used
Backlink Quality Score = Σ (Normalized Factor Score × Weight)
Each factor is normalized to a 0–100 scale first.
The final score also stays on a 0–100 scale.
Weighted model
- Domain Authority = 14%
- Page Authority = 8%
- Topical Relevance = 16%
- Anchor Naturalness = 8%
- Organic Traffic Strength = 10%
- Inverse Spam Score = 12%
- Outbound Link Control = 7%
Remaining weights
- Placement Visibility = 7%
- Link Attribute Value = 5%
- Indexability = 4%
- HTTP Status Health = 3%
- Editorial Context = 4%
- Referring Domain Diversity = 2%
Scoring notes
Traffic Strength uses a log scale, so extremely large sites do not dominate unfairly.
Inverse Spam Score is calculated as 100 minus spam score, so lower spam performs better.
Outbound Link Control declines as source-page outgoing links increase, because link equity and editorial focus often weaken.
How to Use This Calculator
- Enter the source domain, target page, and anchor text.
- Rate authority, relevance, anchor naturalness, editorial context, and diversity from 0 to 100.
- Add monthly organic traffic, spam score, and outbound link count.
- Select the placement, link attribute, indexability state, and HTTP status.
- Click Check Backlink Quality to view the result, breakdown table, and graph.
- Use the CSV and PDF buttons to save the evaluation.
FAQs
1. What does this score measure?
It estimates how valuable and safe a backlink appears by combining authority, relevance, trust, placement, traffic, and risk indicators into one weighted score.
2. Is Domain Authority enough by itself?
No. A strong domain can still send weak links if the page is irrelevant, overloaded with outgoing links, poorly indexed, or placed in low-value sections.
3. Why is spam score inverted?
Lower spam usually means lower risk. Inverting it keeps every factor aligned, where higher normalized scores always indicate better backlink quality.
4. Why use a log scale for traffic?
Traffic varies massively between websites. A log scale prevents giant publishers from overpowering the model while still rewarding meaningful organic visibility.
5. Are nofollow links useless?
No. They can still drive qualified referral traffic, diversify your profile, support brand visibility, and appear naturally within a healthy backlink mix.
6. When should I consider disavow review?
Review links when spam is high, relevance is weak, placements look manipulative, source pages are broken, or your score repeatedly falls into risky or toxic ranges.
7. How often should I audit backlinks?
Monthly reviews work for active sites. Faster-growing campaigns, aggressive outreach, or recent ranking drops may justify weekly checks.
8. Can this replace manual review?
No. It speeds prioritization, but final decisions still benefit from checking page context, editorial intent, source reputation, and overall link profile patterns.