Protractor

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Easily measure angles in your browser window.

Latest reviews

• (2023-03-16) David Battaglino: Simple to use and very effiency!! I really hint it to everyone.
• (2023-01-25) Kalamazoo Veterans: The tool seems to be very helpful. However, the numbering system on my protractor is counterclockwise and I am unable to rectify the problem [90 is 270 and vice versa]. I've tried uninstalling and reinstalling multiple times and it appears to be the default. Please help!
• (2022-12-20) Lilly Roundare: very simple to use, if a little difficult to center exactly. but overall it helped a lot :)
• (2022-09-10) Hansse: It's been really helpful during my online classes
• (2022-06-20) Martin Rosenblad: Precis vad jag behövde, mycket bra!
• (2022-05-19) Tom 359: Fantastic UI design, not fiddly at all.
• (2022-04-27) Sean Ryan: It is anti-clockwise. No setting to flip it. Useless.
• (2022-04-13) Zac D: Awesome tool, wish I could double click on a number/angle to copy it.
• (2021-11-04) S D: just what i needed
• (2021-10-06) Jossy Sebastian: but it is not visible over some colors ,NEED IN BLACK COLOR
• (2021-10-01) Jack: Doesn't ever open. Totally unusable.
• (2021-09-01) Muniba Invests: Maybe I don't know how to use it, but I click on the extension and NOTHING happens.
• (2021-08-18) Andy Parsons: Great tool for measure joint angles for patients virtually! Thanks!
• (2021-08-14) Steven Landman: Simple, stylish and perfect for what I needed.
• (2021-08-07) _MemoryCore_: It works :D
• (2021-07-11) Stan I: Exactly what I wanted. Thank you!
• (2021-07-01) Crispin Dry: Really helpful for me. From my window I can see a church spire on the horizon, about 4 miles away. I took a reading with my compass (297°) then, using the protractor, I centred it on my location in Google Maps and set the line to that reading. Lo and behold the line went very close to a church marked on the map that was actually 4.14 miles away! (The church was St. Jude's in Hampstead, London. Download the protractor and you should be able to work out which street I live in!)
• (2021-04-06) T_Rizzle: It is perfect. It is accurate and no bugs or unworking things on it. Perfect for geo homework.
• (2021-03-11) haobing zheng: this is so useful and i think it is perfect
• (2021-03-06) KY Poon: This extension is great! I would suggest to make "clockwise" rotation AND 0 degree at the North to make measurement of North bearing much easier. Thanks to the option page, I can customize that by my own. But I would suggest to make it a default option to save everybody's time.
• (2021-02-25) ashkillaシ: This is the worst protractor app ever, I might as well go and buy a real one.
• (2021-02-23) Kabir Kumar: Pretty great!
• (2021-01-26) Cat Gamer: I love it but I have no idea how to change colours can someone help pls?
• (2021-01-19) William Tong: It's not moving, any ideas?
• (2020-12-03) iamcatrina: thanks for this helped a ton with geometry homework
• (2020-11-14) Twiisted: It hard to use
• (2020-10-22) Zachary Benson: it worked at first but now when i click n the little icon it won't open
• (2020-10-19) Lord Widdershins: Simple and eeasy for when you need an angle, but dont have a protractor... and its free!
• (2020-10-12) Brian Ly: Really good; you don't need a physical protractor
• (2020-10-01) a guy on the internet: Works really well. However there is 1 thing I would like to see which would be a dark line mode which makes the protractor dark for working on light things like a document. But it works perfectly.
• (2020-09-02) Lord Elmo: Great extension, I do have a suggestion though. So when you are trying to measure the angle you can make the lines transparent to make sure you are directly on what it is you are trying to measure
• (2020-08-26) Isaiah Saunders: I used this for my school and it worked but when I closed it, I couldn't press any of my choices.! I'm going to keep trying this but if it keeps doing the same thing than...
• (2020-07-27) Benjamin Baker: So helpful for utility line design. Recommending it to all of my coworkers!
• (2020-07-16) Relaxing Music Videos: May I inquire , If I measure on a document of Microsft Word which are already a picture. Would it be possible?Kindle Help. Thank you
• (2020-07-01) Bryentt Engelhardt: wouldn't work for me. Couldn't load over a jpg loaded in chrome. so I added it to google photos. It worked there, but the need to have the full circle prevents me from starting the center point at the top of the image.
• (2020-04-07) Dave Baker: Just brilliant! I use this to calculate angles on mapping for drone flying. I set the middle over something of interest (like a local airport), rotate the overlay so that 0° is true north, I then set the green pointer at the Magnetic deviation for my area (10.5° for my location) and the blue pointer for the area I want to work out. I can then see the difference between the Blue and Green pointers, giving me a Magnetic compass reference to work with. Absolutely love it.
• (2020-04-01) Dawn Marchant: Why do the angles increase backwards? I can rotate it to have zero at the top but for measuring bearings you go clockwise so 90 degrees would be on the right not the left. I can't see anyway to amend this in the options. Is this possible?
• (2020-02-04) Heather Zhang: 3.0.1 Does not working at all... no reaction after clicked the button...
• (2020-01-23) Michael Lee: The tool works great, but I'm a little concerned by the new update - why does it need permissions for browser history?
• (2020-01-22) Sean Oconnor: Great Addon, could you maybe add Gradians ? (0-400)
• (2019-11-23) Johan Muizelaar: Works great, both on my Chromebook and Windows 10 laptop. Eye for detail.
• (2019-11-22) Kris Mahan: This is a great extension. I find this extremely useful. If i could make a suggestion.... allow another unit for pitch gauge. (think roofing)
• (2019-11-19) Fatima: very simple and easy to use.
• (2019-11-13) Robbie Greiner: Simple and easy to use. Love the new UI!
• (2019-07-29) Sayyaf Ali: Does not work on images or jpg's
• (2019-03-29) Daniel J. Lewis: Really useful and straightforward. I wish you could choose where the 0 degree bearing starts and choose CW, CCW, but other than that its perfect.
• (2019-03-20) Fifth Nebula218: trying to move the protractor on my chrome book makes the protractor jump and get stuck at the top on the screen. if fixed i will rate higher.
• (2019-03-03) Анна Михельсон: Простое, функциональное.
• (2019-01-23) Riot Act: it is a good extension and if the pointers stop moving just double click them
• (2019-01-14) I don't know how to get it to work :(