comparing movie reviews

Film review sites use a variety of different rating systems, making it somewhat difficult to compare assessments from many independent sources. Which is the better score, 4 out of 5 stars from a site that only uses whole stars, or 3 out of 4 stars from a site that uses half-stars? (You might be surprised at the answer!) To help answer such vexing questions, I’ve created a comparison of movie rating systems, with conversion tables covering the most commonly used rating schemes.