Calculator
Enter up to four domains. Leave unused domain blocks blank. The calculator uses a weighted comparison model rather than pulling live authority metrics from an external API.
Example Data Table
| Domain | DA | Backlinks | Ref. Domains | Keywords | Traffic | Spam % |
|---|---|---|---|---|---|---|
| alphaexample.com | 72 | 18500 | 1420 | 8700 | 69000 | 3 |
| betabrand.io | 61 | 9700 | 880 | 6200 | 47000 | 5 |
| gammastore.net | 54 | 7200 | 530 | 4100 | 28500 | 8 |
| deltahub.org | 47 | 3600 | 290 | 2300 | 15000 | 6 |
Formula Used
This page estimates overall comparative strength with a weighted benchmark. It does not calculate an official third-party authority metric. Larger counts are log-normalized so huge backlink or traffic numbers do not overpower everything else.
Normalized metric:
Normalized Value = log10(Value + 1) / log10(Max Value + 1) × 100
Composite score:
Score = (0.35 × DA) + (0.20 × Referring Domains Norm) + (0.15 × Backlinks Norm) + (0.15 × Organic Keywords Norm) + (0.10 × Organic Traffic Norm) + (0.05 × (100 - Spam Score))
- DA receives the highest weight because it summarizes relative authority.
- Referring domains matter more than raw backlinks because link diversity is usually stronger than repetition.
- Keywords and traffic reflect real search footprint.
- Spam score slightly reduces strength through the clean profile term.
How to Use This Calculator
- Add at least two domain names.
- Enter each domain’s authority, backlinks, referring domains, organic keywords, monthly traffic, and spam score.
- Click Compare Domains.
- Review the result cards, chart, comparison table, and domain-specific focus suggestions.
- Export the results to CSV for spreadsheets or PDF for reporting.
- Update the values as new SEO data becomes available and compare again.
FAQs
1. What does this calculator compare?
It compares manually entered SEO indicators across domains, including authority, backlinks, referring domains, organic keywords, organic traffic, and spam score, then produces a weighted benchmark score.
2. Is domain authority a Google metric?
No. Domain authority is a third-party predictive metric. It can be useful for relative comparisons, but Google does not publish or use a public score called domain authority.
3. Why are backlinks log-normalized?
SEO link counts often vary by huge amounts. Log normalization keeps very large numbers from dominating the model and makes comparisons more balanced and realistic.
4. Can a lower DA site still win the comparison?
Yes. A site with lower authority can still score better if it has stronger referring domain diversity, broader keyword coverage, better traffic, and a cleaner link profile.
5. How often should I update the inputs?
Monthly works well for most campaigns. Faster-moving niches may benefit from weekly refreshes, especially during aggressive link building or major content expansion.
6. Which metric matters most in this model?
Domain authority has the largest single weight, but the final score still depends on link diversity, visibility, traffic strength, and risk. Balanced domains usually perform best.
7. Can I compare sites from different niches?
You can, but context matters. Similar niches and search markets usually produce more useful comparisons because keyword demand, link opportunities, and traffic ceilings differ.
8. Does spam score reduce the final score?
Yes. The model converts lower spam into a cleaner profile score. Cleaner profiles receive a small advantage, helping separate strong domains from risky ones.