A printable protractor that prints to exact scale
Pick the size, the degree marks, and 180 or 360 degrees. Get a print-accurate PDF with a built-in calibration bar, so you can confirm the scale is exact before you measure a single angle.
Most "printable" protractors print the wrong size. This one does not.
Built in real units
The geometry is authored in millimetres and points, not screen pixels. A 150 mm protractor is drawn at exactly 150 mm, so at 100 percent print it measures 150 mm on paper.
Verify before you trust it
Every sheet carries a 100 millimetre calibration bar. Lay a ruler on it after printing. If it reads 100 mm, your scale is exact. If not, reprint at actual size.
Your settings, your sheet
Half or full circle, your diameter, marks every 1, 5, or 10 degrees, a double scale and radial lines on or off. The preview is exactly what prints.
Print it right, read it right
Short, practical guides on printing to scale, using a protractor, and reading the two scales without the classic mix-up.
Print to scale
How to print a protractor to scale: set page scaling to 100 percent, turn off fit to page, then measure the calibration bar to confirm the size.
Read the guide 02How to use one
How to use a protractor step by step: line up the center on the vertex, set the baseline along one arm, and read where the other arm crosses the scale.
Read the guide 03Inner vs outer scale
A protractor has two scales, inner and outer, running opposite ways. Here is how to tell which one to read so you never confuse a 60 degree angle for 120.
Read the guide 04PDF vs image
A protractor PDF holds its exact size; a screenshot does not. Why the PDF format keeps the scale, and what to check before you print one to use.
Read the guideFrequently asked questions
Will the protractor print at the correct size?
Yes, as long as you print at 100 percent with page scaling set to None or Actual size. The file carries real physical dimensions, so a protractor set to 150 millimetres prints at exactly 150 millimetres. Every sheet includes a 100 millimetre calibration bar so you can measure it after printing and confirm the scale in two seconds.
Why does the print scale matter so much?
A printer set to fit to page quietly shrinks or stretches the page to clear its unprintable margin. Even a two percent change makes the angles and the ruler wrong. That is why every authoritative printable-tool guide tells you to turn scaling off and print at actual size, then verify with a reference mark.
Do I need to sign up or pay?
No. The tool runs entirely in your browser, builds the PDF on your own device, and is free with no account. Nothing you enter is sent anywhere.
Can I choose 180 or 360 degrees?
Yes. Pick a half-circle 180 degree protractor or a full 360 degree circle, set the diameter, choose marks every 1, 5, or 10 degrees, and turn the double scale or radial lines on or off. The preview updates as you change each setting.
What is the double scale for?
A protractor usually carries two sets of numbers running in opposite directions so you can measure an angle opening from either side without flipping the tool. The two readings always add up to 180. You can keep it on or switch to a single clean scale.
Make your protractor now
Set the size, print at 100 percent, and confirm with the calibration bar. Free, in your browser.