Cronbach's alpha reliability calculator
Paste your questionnaire data from Excel and get the reliability coefficient and item analysis instantly.
Everything is calculated in your browser, and your data isn't sent anywhere.
About the tool
Alpha = (k ÷ (k − 1)) × (1 − Sum of item variances ÷ variance of the total score), where k is the number of items. Each item's correlation with the corrected total score (excluding the item itself) is also calculated. Everything is computed in your browser, and your data isn't sent anywhere.
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