Printable Semi-Log Graph Paper
Regular graph paper uses equal numeric steps on both axes. Semi-log graph paper keeps one axis linear and spaces the other by powers of ten, so values such as 1, 10, 100, and 1,000 can be plotted without crowding the smaller numbers together.
Choose how many tenfold cycles your data needs, then select a paper size and orientation. You can download the PDF, open it in your browser for printing, or customize the grid.
Recommended download
A4 3-cycle semi-log graph paper
Not sure where to start? This A4 portrait template covers three powers of ten, such as 1 to 1,000, on the vertical logarithmic axis. It is a practical general-purpose choice for science labs, growth and decay curves, and engineering data.
- Paper
- A4 (210 x 297 mm)
- Orientation
- Portrait
- Log scale
- Vertical / Base 10
- Range
- 3 cycles
Print at Actual Size or 100% when the physical 10mm spacing on the linear axis must remain accurate.
Is semi-log graph paper right for my data?
Use it for tenfold changes
Choose semi-log paper when one variable changes by ratios or powers of ten, such as exponential growth, decay, frequency response, or measurements covering a wide range.
Match cycles to your data
One cycle covers a tenfold range. Count how many powers of ten your minimum and maximum values span, then choose 1, 2, 3, or 4 cycles.
Use regular paper for linear data
If both variables change in equal numeric steps, use square grid or coordinate paper instead. Semi-log spacing is only helpful when one axis needs a logarithmic scale.
Related semi-log graph paper
FAQ
What is semi-log graph paper used for?
Semi-log paper is used when one variable changes exponentially or spans several powers of ten while the other variable changes linearly. Common examples include growth, decay, frequency response, and scientific measurements.
How many logarithmic cycles should I choose?
Use one cycle for one tenfold range, two cycles for two powers of ten, three cycles for three, and four cycles when the logarithmic variable spans four orders of magnitude.
Which axis is logarithmic on these templates?
The vertical Y-axis is logarithmic and the horizontal X-axis is linear. Open the custom generator if you need to place the logarithmic scale on the other axis.
How should I print semi-log graph paper?
Choose the PDF that matches the paper loaded in the printer, then print at Actual Size or 100%. Turn off Fit to Page when physical spacing must remain accurate.