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Comparison
Log-log and semi-log graph paper both use logarithmic scales but in different configurations. Log-log has logarithmic scales on both axes for power-law relationships, while semi-log uses one linear and one logarithmic axis for exponential growth and decay.
Key facts
Side-by-side
| Feature | Log-Log | Semi-Log |
|---|---|---|
| Axes | Both logarithmic | One linear, one logarithmic |
| Best for | Power-law relationships | Exponential growth and decay |
| Data range | Multiple orders on both axes | One axis can be linear |
| Typical graph | Frequency vs magnitude | Time vs concentration |
| Example use | Earthquake magnitude analysis | Radioactive decay plotting |
When to use
Choose Log-Log: Choose log-log graph paper when analysing data where both variables span multiple orders of magnitude, such as power-law distributions, scaling phenomena, or frequency spectra.
Choose Semi-Log: Choose semi-log graph paper when visualising exponential growth or decay over time, such as population trends, drug concentration curves, or investment returns.
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Last reviewed and updated by graphpdf.com. Figures on this page follow ISO 216 and ANSI/ASME Y14.1 sheet dimensions. View as Markdown.
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