diff --git a/CHANGELOG.md b/CHANGELOG.md
index cdc774e1..c3220386 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -29,6 +29,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Add nf-test to local subworkflow: `STARFUSION_WORKFLOW`. [#597](https://github.com/nf-core/rnafusion/pull/597)
 - Add nf-test to local module: `FUSIONINSPECTOR`. [#601](https://github.com/nf-core/rnafusion/pull/601)
 - Add nf-test to local subworkflow: `FUSIONREPORT_WORKFLOW`. [#607](https://github.com/nf-core/rnafusion/pull/607)
+- Updated documentation for fusion-report score calculation to reflect 80/20 weight distribution between tool detection and database hits [#620](https://github.com/nf-core/rnafusion/pull/620)
 
 ### Changed
 
diff --git a/docs/output.md b/docs/output.md
index ad3c78e3..3698f7a6 100644
--- a/docs/output.md
+++ b/docs/output.md
@@ -264,13 +264,18 @@ The weights for databases are as follows:
 - MITELMAN (50)
 - FusionGDB2 (0)
 
-The final formula for calculating score is:
+The score is calculated using two components:
 
-$$
-score = 0.5 * \sum_{tool}^{tools} f(fusion, tool)*w(tool) + 0.5 * \sum_{db}^{dbs} g(fusion, db)*w(db)
-$$
+1. Tool Detection (80% of total score)
 
-All tools have the same weight.
+   - Calculated as: (number of tools detecting the fusion) / (number of tools actually used)
+   - This reflects how many of the active tools found the fusion
+
+2. Database Hits (20% of total score)
+   - Based on database matches using weights above
+   - Calculated as: (number of database hits) / (total possible database hits)
+
+Final score = (0.8 × Tool Detection Score) + (0.2 × Database Hits Score)
 
 ### Salmon