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ROUGE-1 Score Calculator

EasyText Generation & Advanced

Calculate the ROUGE-1 F1 score between a generated summary and a reference summary.

ROUGE-1 measures unigram overlap:

  • Precision = (matching unigrams) / (unigrams in generated)
  • Recall = (matching unigrams) / (unigrams in reference)
  • F1 = 2 * Precision * Recall / (Precision + Recall)

All comparisons are case-insensitive. Round the F1 score to 4 decimal places.

Input format:

  • Line 1: Generated summary
  • Line 2: Reference summary

Example:

Input:
the cat sat on the mat
the cat is on the mat
Output:
0.8333
Reasoning:

Step 1: Extract unigrams Generated: {the:2, cat:1, sat:1, on:1, mat:1} → 6 words Reference: {the:2, cat:1, is:1, on:1, mat:1} → 6 words

Step 2: Count matches (min count per word) the: min(2,2)=2, cat: min(1,1)=1, on: min(1,1)=1, mat: min(1,1)=1 Total matches: 5

Step 3: Compute scores Precision = 5/6, Recall = 5/6 F1 = 2 * (5/6) * (5/6) / (5/6 + 5/6) = 5/6 ≈ 0.8333

Constraints:

  • Case-insensitive comparison
  • Use word-level unigrams (split on whitespace)
  • If precision + recall = 0, F1 = 0.0
  • Round F1 to 4 decimal places
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Test Results

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