Online Correlation Calculator, Calculate Pearson’s r with Interactive Scatter Plot. Need to calculate the correlation between two datasets quickly? This free online correlation coefficient calculator does more than just give you a number—it creates a beautiful, customizable scatter plot with trendline in real-time. Input your X and Y values (comma or space-separated), and instantly get Pearson’s correlation coefficient (r), sample size (n), and a professional-grade visualization perfect for reports or presentations. With built-in examples for positive, negative, and weak correlations, plus a responsive glass-morphism design, it’s the perfect tool for students, teachers, and data enthusiasts. Try it live in your browser—no download required.
