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Gingival Index Calculator

Work out gingival index instantly with clear inputs, formula shown and shareable results.

About Gingival Index Calculator

Averages the Loe-Silness gingival scores of 0 to 3 across the sites examined, where a score of 2 or more implies bleeding on probing.

Formula

Loe-Silness gingival index

Index = sum of site scores / sites examined; 0.1-1.0 mild, 1.1-2.0 moderate, 2.1-3.0 severe inflammation

Worked example

With the default values below, Gingival Index Calculator returns Loe-Silness gingival index of 1.125. Change any input above and every figure here is recalculated in your browser.

Inputs used

Sum of site scoresaccepts 0–600
18
Sites examinedaccepts 1–200
16

Results

Loe-Silness gingival index
1.125
Severity band
Moderate inflammation
Bleeding note
Bleeding on probing less likely
Sites examined
16

Step by step

  1. 1Values used
  2. 2Loe-Silness gingival index
  3. 3Loe-Silness gingival index= 1.125
  4. 4Severity band= Moderate inflammation
  5. 5Bleeding note= Bleeding on probing less likely
  6. 6Sites examined= 16

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 3 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.

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

Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.

Frequently Asked Questions

What does a score of 2 mean?

Moderate inflammation with redness, oedema and bleeding on probing.

Is bleeding on probing a better measure?

It is simpler and more reproducible, which is why percentage of bleeding sites is now widely reported instead.

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