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Printable paper generator

Semi-Log Graph Paper Generator

Plot exponential relationships with one logarithmic axis and one evenly spaced linear axis.

No accountExact physical unitsPDF · PNG · SVGBrowser-local generation

Pattern settings

Customize your paper

Presets

Adjust the settings and review the live preview before downloading.

Live preview

210 × 297 mm

Measurements are stored in millimetres. Inch inputs are converted at 25.4 mm per inch. Print PDFs at Actual size or 100%.

How this pattern works

Within every logarithmic decade, positions use log base 10 of values two through nine rather than evenly spaced approximations.

How to use the generator

  1. Choose a preset or adjust the pattern-specific measurements.
  2. Select the paper size, orientation, units, margins, colors, and line weight.
  3. Review the live preview and correct any validation warning.
  4. Download vector PDF or SVG, create a 150/300 DPI PNG, or print from the browser.

Practical uses

  • Exponential growth and decay
  • Frequency-response plots
  • Scientific data spanning several magnitudes

Accurate printing

PDF and SVG retain vector geometry. For physical measurements, print at Actual size or 100% and turn off Fit, Shrink, or Scale to page. Use the first page as a measurement check when printer drivers add non-printable margins.

Questions

Frequently asked questions

Can I print this semi-log paper at actual size?

Yes. PDF is the most predictable format. In the print dialog choose Actual size or 100% and disable Fit to page.

Which paper sizes are supported?

A3, A4, A5, US Letter, and US Legal are available in portrait or landscape orientation.

Are the logarithmic divisions evenly spaced?

No. Minor lines are placed at log10(2) through log10(9) within each decade.

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