Protractor

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Easily measure angles in your browser window.

Latest reviews

• (2025-07-26) Sergio Zubizarreta: Great for math exercises.
• (2024-09-13) MuzComedian: This needs some shade toggle or color options I can't see protractor itself where I need to measure
• (2024-08-15) Jeremiah Adegboyega (vex): girl its not "i wish i could give 0 stars" its "i wish i could give 6 stars"
• (2024-08-15) Raiheera Singh Virk: which i could give 0 stars best thing ever!
• (2024-07-29) Keith: Super useful, came in very handy for a project.
• (2024-05-24) STOCKER TIME: Amazing
• (2024-05-14) Shorya Upadhyay: This is an awesome tool!
• (2024-04-03) Mike E: Awesome tool, thank you!
• (2024-03-05) Adam Weinert: Brilliant tool - would love it if it could also display mils (6400)!
• (2024-02-26) Brahim Oubbad: Nice tool, thank you so much
• (2024-01-20) William J. Stockich: For years and years I've searched for a tool that could measure angles. No learning curve here. Accuracy up to 4 decimal digits. Zero-angle (+ x-axis) rotatable to any angle. Click- nudge to get an angle vertex exactly over a point. Zoomable. There are other options and most are adjustable. Beyond imaginable! No improvements left for me except going outside the browsers!
• (2023-11-26) progamer2 progamer2: just amazing bro
• (2023-03-16) David Battaglino: Simple to use and very effiency!! I really hint it to everyone.
• (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!
• (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 :)
• (2022-12-20) 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
• (2022-09-10) 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.
• (2022-05-19) Tom 359: Fantastic UI design, not fiddly at all.
• (2022-04-27) Sean Ryan: It is anti-clockwise. No setting to flip it. Useless.
• (2022-04-27) 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.
• (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
• (2021-11-04) S D: just what i needed
• (2021-10-06) Jossy Sebastian: but it is not visible over some colors ,NEED IN BLACK COLOR
• (2021-10-06) Jossy Sebastian: but it is not visible over some colors ,NEED IN BLACK COLOR
• (2021-10-01) Jack: Doesn't ever open. Totally unusable.
• (2021-10-01) 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!
• (2021-08-18) 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.
• (2021-08-14) Steven Landman: Simple, stylish and perfect for what I needed.
• (2021-08-07) _MemoryCore_: It works :D
• (2021-08-07) _MemoryCore_: It works :D
• (2021-07-11) Stan I: Exactly what I wanted. Thank you!
• (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!)
• (2021-07-01) 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.
• (2021-04-06) 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
• (2021-03-11) 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.
• (2021-03-06) 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.