Multiple Y-Axis Chart Maker

A multiple Y-axis chart displays two or more data series that have different value ranges or units. Each series gets its own Y-axis scale, allowing you to compare metrics that would otherwise be impossible to show together. For example, you can compare revenue in millions with profit margin as a percentage on the same chart, each with its own properly scaled axis.

Use this chart type when your data series have vastly different scales or units. Common scenarios include financial analysis (income, cashflow, and revenue), business metrics (sales volume vs conversion rate), scientific data (temperature vs pressure), or any situation where plotting everything on a single scale would make some data invisible or meaningless.

Each Y-axis is color-coded to match its corresponding data series. Look at the axis labels and titles to understand what unit each axis represents. The left side typically shows two related metrics, while the right side shows the third metric with the line series. Hover over data points to see exact values from all series at that point.

Stock analysis is one of the most popular uses, where you compare price, volume, and indicators together. Marketing teams use it to show ad spend versus conversions. Manufacturing compares production output with defect rates. Healthcare might show patient counts alongside treatment success rates. Any time you need to correlate different metrics over time, this chart type is invaluable.

Absolutely. Your data never leaves your browser. All chart rendering happens locally on your device, and we have no ability to see, store, or access your numbers. This makes our tool perfect for sensitive financial data, confidential business metrics, or any information you need to keep private.