Harvard Online
CS50's Introduction to Databases with SQL
Harvard's course on querying, designing and scaling relational databases with SQL.
Free certificate
50 hrsBeginner
16 free courses
Free Data Science Courses
Data science combines programming, statistics and clear communication. This collection brings together free courses that teach you to clean, analyse and visualise data, with links straight to each provider.
16 free courses
Harvard Online
CS50's Introduction to Programming with R
Harvard's R course: representing, transforming, tidying and visualizing data.
Free certificate40 hrsBeginnerKaggle Learn
Data Cleaning
Kaggle's course on fixing missing values, scaling, dates, encodings and messy entries.
Free certificate4 hrsBeginnerIBM SkillsBuild
Data Fundamentals
IBM SkillsBuild's free data learning plan, ending in a shareable IBM badge.
Free certificate10 hrsBeginnerKaggle Learn
Data Visualization
Kaggle's short course on making line, bar, scatter and distribution charts with seaborn.
Free certificate4 hrsBeginnerKaggle Learn
Intro to SQL
Kaggle's quick introduction to SQL queries using Google BigQuery public datasets.
Free certificate3 hrsBeginnerKaggle Learn
Pandas
Kaggle's short hands-on course on reading, selecting, grouping and cleaning data with pandas.
Free certificate4 hrsBeginnerKaggle Learn
Python
Kaggle's quick Python primer for data science, run entirely in browser notebooks.
Free certificate5 hrsBeginnerfreeCodeCamp
Relational Databases Certification
freeCodeCamp's rebuilt certification on Bash, SQL, PostgreSQL and Git, with a free exam.
Free certificate300 hrsBeginnerKaggle Learn
Advanced SQL
Kaggle's follow-on SQL course: unions, analytic functions, nested data and efficient queries.
Free certificate4 hrsIntermediatefreeCodeCamp
Data Analysis with Python Certification (Legacy)
freeCodeCamp's project-based certification in NumPy, pandas and visualization.
Free certificate300 hrsIntermediateIIT Madras' short NPTEL course on Python, pandas and visualization with two case studies.
Paid certificate16 hrsBeginnerIIT Madras' NPTEL course on the maths and methods behind data science, using R.
Paid certificate48 hrsIntermediateMicrosoft (open-source curricula)
Data Science for Beginners
Microsoft's free 10-week, 20-lesson open curriculum introducing data science.
No certificate40 hrsBeginnerKhan Academy
Statistics and Probability
Khan Academy's full free statistics course, from describing data to significance tests.
No certificate60 hrsBeginnerMIT OpenCourseWare
6.0002 Introduction to Computational Thinking and Data Science
MIT's follow-on to 6.0001 on optimization, simulation, statistics and intro machine learning.
No certificate60 hrsIntermediate
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Questions about free data science courses
Which language is best for data science?
Python is the most common choice in courses, with R and SQL also widely used. Each listing tags the tools it covers so you can pick one that fits your goal.
Are the certificates really free?
Each course card states the certificate status: free means the provider issues a certificate or badge at no cost, paid means the learning is free but the certificate costs extra, and none means no certificate is offered. Always confirm on the provider's page before you enrol, as policies change.
Where do I enrol?
Every course links straight to the provider's own page. We do not host the courses or take payment; you sign up with the provider directly.