Cronbach's Alpha Calculator

A lightweight web app tool to calculate Cronbach's alpha (α) that accepts CSV, XLSX, and XLS files.

Check it out: https://cronbach-calc.vercel.app/

Supported File Extensions

• XLSX / XLS
• CSV

Features

• Input Modification - Edit and adjust data from file uploads or manual input
• Formula Breakdown - View step-by-step calculation process
• Statistical Analysis - Detailed variance and mean calculations

Built with

• React JS + Vite (SWC)
• TailwindCSS

TODO

• better table navigation for large datasets to improve ux
• other reliability assessment methods (?)

Validation

Verified against existing calculators and references for accuracy testing.

Sample input file. The header row is intentionally included to simulate an error; remove it to retain only the raw data.

Notes

I built this project mainly to learn my way around web frameworks. It gave me plenty of practice with JavaScript basics, TailwindCSS, formatting tools like eslint/prettier, SEO/meta tag setup, and platform deployment. I also discovered react-icons - a really nice little gem.

Send your feedbacks here.

Credits

• Uedufy — Interpretation reference tables, validation reference
• Eugene O'Loughlin — Validation reference
• Wessa, P. (2025), Free Statistics Software, Office for Research Development and Education — Validation reference
• Cogn-IQ — Validation reference
• Datalab — Validation reference