Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

Language Entropy Calculator

Computes the Shannon information entropy of a text based on character or symbol probabilities. Used by computational linguists and NLP researchers to quantify predictability and information density in language.

Character Probability 1

Character Probability 2

Character Probability 3

Fill in the required fields to see your result.

Language

CEFR Level Score Calculator

Convert any raw test score to a CEFR proficiency level on the A1–C2 scale. Ideal for teachers, test designers, and language learners benchmarking exam results.

Test Score (points)

Maximum Score (points)

Fill in the required fields to see your result.

Key differences

	Language Entropy Calculator	CEFR Level Score Calculator
Category	Language	Language
Inputs required	3	2
Result	Entropy (bits)	CEFR Level Score
What it does	Computes the Shannon information entropy of a text based on character or symbol probabilities. Used by computational linguists and NLP researchers to quantify predictability and information density in language.	Convert any raw test score to a CEFR proficiency level on the A1–C2 scale. Ideal for teachers, test designers, and language learners benchmarking exam results.