Printable Protractor
Print a protractor at the size you need. Choose a 180° half circle or a 360° full circle, set the radius in millimetres or inches, and pick marks every 1° (with longer 5° and 10° marks), every 5° or every 10°. Two number scales read both ways round, so you can measure from either arm, or choose one scale for beginners. Each protractor has a centre mark on the baseline, a dashed cut line and, if you want, a red line at an angle you type (for example 35°) to copy or check an angle. Start from 7 ready protractors or set your own, and fill the page with as many as fit. Every page has a calibration square and the print-at-100% note. Download a vector PDF, 300 DPI PNGs or an SVG. Nothing is uploaded.
100% private — everything runs in your browser. Everything runs in your browser; nothing is uploaded.
Print at 100% (Actual size), not Fit to page, then measure the square in the corner. Cut on the dashed line. Put the centre mark on the corner of the angle and the baseline (0°) along one arm, then read where the other arm crosses the scale that starts at 0 on that arm. Print on transparency film to see the lines through it.
Protractor
Page
Runs in your browser with our own code: nothing you type is uploaded or saved. You may use what you make here, including commercially, with no credit needed.
How to print and use a protractor
- Pick a ready protractor, or choose 180° or 360°, the radius and the marks.
- Choose one or two number scales and, if you like, type an angle for the red angle line.
- Download the PDF and print at 100% (Actual size), then measure the calibration square.
- Cut on the dashed line. Card stock is stiffer; transparency film lets you see the lines underneath.
- Put the centre mark on the corner of the angle and the baseline along one arm. Read the scale that starts at 0 on that arm where the other arm crosses it.
What you can use it for
- Maths lessons and homework on angles
- A see-through protractor on transparency film
- Big protractors for a classroom board or wall
- Checking and copying angles in drawings and crafts
- Angle cards and worksheets with a marked angle
- Marking cuts for woodwork and models
The ready protractors
| Protractor | Type | Radius | Marks | Scales | Per US Letter page | Per A4 page |
|---|---|---|---|---|---|---|
| 180° protractor, double scale, 1° | 180° | 80 mm | 1° | Two | 2 | 2 |
| 360° protractor, double scale, 1° | 360° | 85 mm | 1° | Two | 1 | 1 |
| Big 180° protractor (whole page) | 180° | 120 mm | 1° | Two | 1 | 1 |
| 180° protractor for beginners (one scale, 5°) | 180° | 75 mm | 5° | One | 2 | 2 |
| 4 in 180° protractor (radius 2 in) | 180° | 2 in (50.8 mm) | 1° | Two | 3 | 3 |
| 6 in 180° protractor (radius 3 in) | 180° | 3 in (76.2 mm) | 1° | Two | 2 | 2 |
| 360° protractor, one scale | 360° | 85 mm | 1° | One | 1 | 1 |
Portrait pages, except the big one (landscape). Radius = centre to the outer end of the marks.
Largest radius that fits
| Paper | 180°, portrait | 180°, landscape | 360°, portrait | 360°, landscape |
|---|---|---|---|---|
| US Letter | 92.2 mm (3.62 in) | 123.9 mm (4.87 in) | 92.2 mm (3.62 in) | 73.7 mm (2.9 in) |
| A4 | 89.3 mm (3.51 in) | 132.8 mm (5.22 in) | 89.3 mm (3.51 in) | 70.8 mm (2.78 in) |
Reading the two scales
| Mark (from the right, anticlockwise) | 180°: outer | 180°: inner | 360°: outer | 360°: inner |
|---|---|---|---|---|
| 0° | 180 | 0 | 0 | 0 |
| 30° | 150 | 30 | 30 | 330 |
| 45° | 135 | 45 | 45 | 315 |
| 90° | 90 | 90 | 90 | 270 |
| 120° | 60 | 120 | 120 | 240 |
| 180° | 0 | 180 | 180 | 180 |
On the 180° protractor the two numbers at any mark add up to 180; on the 360° protractor they add up to 360 (0 at the 0° mark).
The marks
| Mark every | Mark length | Marks on a 180° protractor | Marks on a 360° protractor |
|---|---|---|---|
| 10° | 8 mm | 19 | 36 |
| 5° | 5.5 mm | 37 | 72 |
| 1° | 3 mm | 181 | 360 |
On an 80 mm radius, 1° is 1.4 mm along the outer edge of the marks.
Which tool to use
| You want | Use |
|---|---|
| A protractor on paper or film, any size | Printable Protractor (this page) |
| To measure an angle on screen or in a photo | Online Protractor |
| Angle grids for drawing | Isometric Graph Paper |
| Nets of 3D shapes to cut and fold | 3D Shape Nets |
To measure angles in a photo or on screen, use the Online Protractor. For 30° and 60° grids, see Isometric Graph Paper; for paper models, 3D Shape Nets.
More free tools
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Frequently asked questions
Is the printed protractor accurate?
Yes, when you print at 100% (Actual size). Every mark is drawn at its exact angle from the centre, and our tests read the PDF back and check the radius and the end of every mark to within 0.2 mm on US Letter and A4. Measure the calibration square on the page first.
How do I use a protractor?
Put the centre mark exactly on the corner (vertex) of the angle and line the baseline up with one arm. Find where the other arm crosses the scale and read the scale that starts at 0 on the first arm.
Why are there two rows of numbers?
So you can measure from either side. On the 180° protractor the outer numbers start at 0 on the left and the inner numbers start at 0 on the right; at every mark the two numbers add up to 180. On the 360° protractor the outer numbers run anticlockwise and the inner numbers clockwise from 0 on the right.
What size is the protractor?
The radius you type, measured from the centre mark to the outer end of the marks. The cut line is 3 mm outside that. The page tells you the largest radius that fits your paper.
What is the difference between 180° and 360°?
A 180° protractor is a half circle for angles up to 180°. A 360° protractor is a full circle, handy for reflex angles (more than 180°) and bearings.
How do I make a see-through protractor?
Print the PDF on transparency film made for your kind of printer (inkjet or laser film are different), then cut it out. Clear film lets you see the angle through the protractor.
What does the angle line do?
It draws a red line from the centre at the angle you type, such as 35°. Use it to copy that angle onto paper, or as an angle card for a lesson.
Is it free?
Yes. There is no sign-up, no watermark and no limit.
Is anything uploaded?
No. The protractors are drawn by JavaScript in your browser and nothing you type is sent anywhere.