Keyword Difficulty Estimate Calculator

Work out keyword difficulty estimate instantly with clear inputs, formula shown and shareable results.

About Keyword Difficulty Estimate Calculator

Difficulty combines the authority of the pages already ranking with how many referring domains they carry. What matters for planning is the gap between that field and your own authority, since it determines how much link acquisition is required.

Formula

Difficulty estimate

Score = average authority × 0.6 + log-scaled referring domain factor

Worked example

With the default values below, Keyword Difficulty Estimate Calculator returns Difficulty Score Out Of 100 of 67.3. Change any input above and every figure here is recalculated in your browser.

Inputs used

Average Authority Of Top Resultsaccepts 1–100: 62
Average Referring Domains To Top Resultsaccepts 0–100,000: 180
Your Domain Authorityaccepts 1–100: 41
Monthly Search Volumeaccepts 1–100,000,000: 8,000

Results

Difficulty Score Out Of 100: 67.3
Authority Gap To The Top Results: 21.0
Referring Domains To Match The Field: 180
Feasibility Assessment: Difficult — needs sustained link building

Step by step

1Values used
2Difficulty estimate
3Difficulty Score Out Of 100= 67.3
4Authority Gap To The Top Results= 21.0
5Referring Domains To Match The Field= 180
6Feasibility Assessment= Difficult — needs sustained link building

Assumptions and limits

The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 1 decimal place, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
Figures are estimates based on the inputs given. Marketing performance, platform fees and conversion behaviour vary by audience, channel and season. Use this as a planning guide, not a forecast.
This is an estimate for general information and not professional financial, tax or legal advice. See the full disclaimer for the limits that apply to this kind of calculator.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Figures are estimates based on the inputs given. Marketing performance, platform fees and conversion behaviour vary by audience, channel and season. Use this as a planning guide, not a forecast.

Frequently Asked Questions

Why use a log scale for links?

Because the difference between 10 and 100 referring domains matters far more than between 900 and 1000.

Can low authority sites still rank?

Yes, on specific long-tail queries where intent match beats authority — that is where new sites should start.