Translation Memory Match Calculator

Calculate fuzzy match percentage, edit distance, and translation leverage rate for CAT tool translation memory segments.

Source Segment Length (words)

Matched Words

Substitutions

Insertions

Deletions

Tab to move between fields

Match Percentage

80%

Edit Distance2

Match Category75

Leverage Rate56%

How to Use This Calculator

Enter the total word count of the project for translation.
Input the translation memory (TM) match breakdown: 100%, fuzzy 85-99%, fuzzy 75-84%, and no match.
Set the full-translation rate per word and discount rates for each fuzzy match tier.
Review the blended cost and time savings from leveraging existing TM matches.
Update your TM after each project to increase future match rates and reduce costs.

What each input means

Source Segment Length (words): Number of words in the source segment being translated.
Matched Words: Number of words that exactly match the TM entry.
Substitutions: Words replaced with different words (e.g., name or number changes).
Insertions: New words added that were not in the TM entry.
Deletions: Words from the TM entry removed in the source.

Match Category: 100 = exact match, 95 = high fuzzy, 75 = fuzzy, 0 = no match.
Leverage Rate: Estimated reuse percentage for cost savings.

Identify Input Parameters
4 parameters
Source Segment Length (words) = 20, Matched Words = 18, Substitutions = 1, Insertions = 1 = 5 input(s) provided
Calculate Match Percentage
Match Percentage = min(100
80 = 80
Calculate Edit Distance
Edit Distance
2 = 2
Calculate Match Category
75 = 75

Engine last updated July 28, 2026. Checked against 1 independently-derived test — how we verify calculators.

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