Orphan Page Ratio Calculator

Measure the share of pages with no internal inbound links.

About Orphan Page Ratio Calculator

The orphan ratio is the share of total pages that pages with no internal inbound links represents, expressed as a percentage. The same figure is also shown per 1,000 and as a "one in every N" odds statement, which is easier to reason about when the rate is very small. Absolute counts hide scale — a rate normalises the number so you can compare periods, channels or cohorts of different sizes, where lower is better.

Formula

Orphan Page Ratio

Orphan Page Ratio = Pages with no internal inbound links ÷ Total pages × 100

Pages with no internal inbound links: The subset being measured
Total pages: The full population it is drawn from

Worked example

With the default values below, Orphan Page Ratio Calculator returns Orphan Page Ratio of 7.08%. Change any input above and every figure here is recalculated in your browser.

Inputs used

Pages with no internal inbound linksminimum 0: 85
Total pagesminimum 0: 1,200

Results

Orphan Page Ratio: 7.08%
Remaining (whole minus part): 1,115
Equivalent per 1,000: 70.8
One in Every: 14.1

Step by step

1Values used
2Orphan Page Ratio
3Orphan Page Ratio= 7.08
4Remaining (whole minus part)= 1,115
5Equivalent per 1,000= 70.8
6One in Every= 14.1

Assumptions and limits

The result is derived only from the 2 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 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

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

Frequently Asked Questions

How is Orphan Page Ratio calculated?

Orphan Page Ratio = Pages with no internal inbound links ÷ Total pages × 100 The orphan ratio is the share of total pages that pages with no internal inbound links represents, expressed as a percentage. The same figure is also shown per 1,000 and as a "one in every N" odds statement, which is easier to reason about when the rate is very small.

Why does Orphan Page Ratio matter?

Absolute counts hide scale — a rate normalises the number so you can compare periods, channels or cohorts of different sizes, where lower is better.

What values do I need to enter?

This calculator takes 2 inputs: Pages with no internal inbound links, Total pages. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.