Free online statistics plot makers and calculators.
Paste paired X/Y data to calculate a trendline equation, slope, intercept, Pearson r, R², RMSE, residuals, and a fitted line chart.
Paste paired X and Y values, one pair per row. Separators: tabs, commas, spaces, line breaks.
PNG, SVG, JPG, and JPEG export run locally.
Enter valid data to calculate results.
Paste paired X/Y values from a spreadsheet-style table or plain text. The calculator uses ordinary least squares to find the fitted line and renders it on top of the scatter plot.
The slope is the expected change in Y for one unit of X. The intercept is the predicted Y value when X is zero. R² estimates how much variation in Y is explained by the fitted line.
A line of best fit is useful when the scatter plot has an approximately linear pattern. With the sample data, Y increases steadily as X increases, so the fitted line has a positive slope and the residual table shows how far each point sits above or below that line.
The slope shows how much the predicted Y value changes for a one-unit increase in X. The intercept is the predicted Y value when X is zero, which is useful when zero is inside the meaningful range of your data.
Pearson r describes the direction and strength of the linear relationship. R² is r squared and estimates how much variation in Y is explained by the fitted line. RMSE summarizes the typical prediction error in Y units, so smaller values usually mean the points are closer to the line.
The residual table compares each observed Y value with the predicted value. Standardized residuals make unusually large errors easier to spot; values with an absolute standardized residual above 2 are marked as potential outliers.
Paste paired X/Y data and create a clean scatter plot.
Create a box plot with quartiles, IQR, and Tukey outliers.
Build a histogram and frequency table from raw values.
Calculate Pearson r and R² from paired X/Y values.
Yes. Copy two numeric columns from a spreadsheet and paste them into the input area. Tab-separated data is supported.
No. DataToPlot parses, calculates, and renders charts in your browser.
The tool supports commas, spaces, tabs, and new lines for numeric data.
Yes. After the preview renders, export the chart as PNG, SVG, JPG, or JPEG.
The page shows a clear error message with the row where parsing failed.
Yes. The calculator shows the fitted equation in y = mx + b form, including slope and intercept.
The calculator uses ordinary least squares simple linear regression.
R² is the share of variation in Y explained by the fitted linear model.